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Alternative medicine

Black Salve

Black Salve is an alternative-medicine practice, but its role is not established. Overall, the evidence is insufficient to show reliable benefits, and it should not be regarded as a proven treatment.

Black Salve is associated with attempts to speed wound healing, but that benefit is not established.

We do not advise this practice

It can cause harm.

Why it is not advised

Black Salve is used with the aim of destroying skin lesions and promoting healing, but there is no human evidence that it accelerates wound healing, and its use has not been shown to reliably clear skin cancer. Caustic tissue destruction can damage healthy tissue while obscuring whether a lesion is malignant or whether cancer remains, potentially delaying effective care. This makes use on a suspected cancerous lesion particularly concerning. The resulting tissue injury can also lead to lasting scarring or impaired function. Safety in pregnancy and while breastfeeding has not been established.

Overview

Black Salve is an alternative-medicine practice, but its role is not established. Overall, the evidence is insufficient to show reliable benefits, and it should not be regarded as a proven treatment. The research includes case reports rather than stronger study designs, limiting how confidently any conclusions can be drawn. Black Salve is harmful and is not advised. The proposed effects do not establish that it can treat a condition, and this evidence does not provide a basis for adopting it as a health practice.

Barely researched: 12 studies. Last checked Oct 9, 2026.

No studies of this practice are on file. What follows is drawn from 30 community reports and general safety knowledge — read it as description, not evidence.

0
human evidence
0
eligible
3
unclassified
0
animal / null result

1 of 9 flagged interactions are serious or life-threatening·2 likely contraindications

EvidenceInsufficient
12
Studies

Evidence checked Oct 9, 2026 · newest study 2025

Study designs:Case series3Case report9
Study grades:
D
12

30 community reports across 3 platforms

Coverage

Effects
3
Side effects
12
Interactions
11
1 high-risk
How to read the evidence

Evidence tier — overall strength of the evidence for the whole compound

  • StrongWell established — backed by strong, consistent human research.
  • ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
  • PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
  • LimitedVery limited evidence — treat this as a hypothesis, not proof.
  • InsufficientNot enough good evidence to draw conclusions yet.

Certainty — how sure we can be that the effect is real

  • Very highVery sure — strong, consistent evidence
  • HighFairly sure — consistent evidence from good studies
  • MediumModerately sure — new studies could change this
  • LowNot sure — little or mixed evidence
  • Very lowVery unsure — almost no usable evidence

Source — where the data comes from

  • Meta-analysisPooled analysis of many trials — the strongest evidence
  • RCTRandomized controlled trial — a strong human study design
  • ClinicalA human clinical study
  • Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
  • Animal researchStudied in animals, not humans
  • Community reportsAggregated user reports — anecdotal signal, not evidence
  • TheoreticalMechanism-based reasoning, not yet tested

Study grade — quality of each underlying study (A best, D weakest)

  • AHigh-quality — strong, consistent human trials
  • BGood — solid evidence with some limitations
  • CModerate — limited, small, or mixed-quality studies
  • DWeak — preliminary, indirect, or animal-only

Confidence — how strongly the sources back a finding

A 0–100 score from study quality and agreement

Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.

Interacts with some medications and supplements — worth checking before combining.See interactions

These are research findings, not promises. A practice does not replace medical treatment.

What does research say?

None of these claims has good evidence yet. Best evidence first.

3 claims:1 not enough evidence2 not tested in people

  • Wound Healing AccelerationNot enough evidence

    Too few or too small studies to know if it works.

    The one study found a benefit. Strongest study: a single case report.

    A 2025 case report described an ulcer in a melanoma and skin cancer context that gradually re-epithelialized and fully healed by day 20.

    Open the Wound Healing Acceleration page
  • Antifungal EffectNot tested in people

    Only tested in animals, cells or theory. Results like these often do not carry over to people.

    The one study found a benefit.

    Sanguinarine has shown in vitro antifungal activity, particularly against Candida species and dermatophytes, with membrane disruption and inhibition of biofilm formation described as possible mechanisms.

    Open the Antifungal Effect page
  • Antiviral EffectNot tested in people

    Only tested in animals, cells or theory. Results like these often do not carry over to people.

    The one study found a benefit.

    Sanguinarine and other alkaloids in Black Salve have shown in vitro antiviral activity against certain enveloped viruses; this finding does not establish an antiviral effect in people.

    Open the Antiviral Effect page

Only reported by users, not studied: Analgesic Effect.

What can go wrong

What studies and reports say about its harms and who is most at risk.

Side effects

Possible: Skin Rash / Irritation.

11 more with weak evidence.

Most at risk if you have
Melanoma, Cancer (General), and Skin Cancer
Serious interactions with
Derma Rolling (Microneedling)

General wellness information, not medical advice. If you already do it, talk to a doctor, especially if you take medicines or have a health condition.

The expert view shows every study, dose protocol and source.

Effects

3 listed

Start here

The best we have, but the evidence is still weak

  1. Wound Healing AccelerationCertaintyLowSourceClinicalnot used for recommendations1 cited study · 1 other source

    A 2025 case report described an ulcer in a melanoma and skin cancer context that gradually re-epithelialized and fully healed by day 20.

    What the sources found

    2 positive · 0 neutral · 0 negativeconfidence 34/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Who was studied

    • People with a condition
    • Melanoma
    • Skin Cancer

    Where the evidence comes from

    • Article1
    • Community reports1

    Protocol behind this outcome

    1 protocolEstimated

    What the studies reporting this result did.

    Format
    Self-guided
    Supervision
    Self-guided

    A repeated course

    Why it isn't used for recommendations

    Animal or in-vitro evidence only

    Show studies (2)
    Case reportDpositiven=120% confidence2025

    Basal Cell Carcinoma Self-Treated With an Escharotic Agent (Black Salve) and Timeline of Cutaneous Responses.

    This ulcer gradually re-epithelialized and fully healed by day 20.

    Low-quality journalOpen-labelNo control group
    Community reportsmoderate effectpositive47% confidence

    This effect was mentioned in 10 of 29 community reports discussing it (YouTube 8, Reddit 2).

    10 mentions
    Open Wound Healing Acceleration
    →
  2. Antifungal EffectCertaintyLowSourceTheoreticalnot used for recommendations1 other source

    Sanguinarine has shown in vitro antifungal activity, particularly against Candida species and dermatophytes, with membrane disruption and inhibition of biofilm formation described as possible mechanisms.

    What the sources found

    1 positive · 0 neutral · 0 negativeconfidence 50/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Expert opinion1

    Why it isn't used for recommendations

    No supporting study on file

    Show studies (1)
    Expert opinionpositive50% confidence

    Sanguinarine exhibits in vitro antifungal properties, particularly against Candida species and dermatophytes, due to membrane disruption and inhibition of biofilm formation.

    Expert knowledge synthesis
    Open Antifungal Effect
    →
  3. Antiviral EffectCertaintyLowSourceTheoreticalnot used for recommendations1 other source

    Sanguinarine and other alkaloids in Black Salve have shown in vitro antiviral activity against certain enveloped viruses; this finding does not establish an antiviral effect in people.

    What the sources found

    1 positive · 0 neutral · 0 negativeconfidence 50/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Expert opinion1

    Why it isn't used for recommendations

    No supporting study on file

    Show studies (1)
    Expert opinionpositive50% confidence

    Black salve contains sanguinarine and other alkaloids from bloodroot (Sanguinaria canadensis), which have demonstrated in vitro antiviral activity against certain enveloped viruses.

    Expert knowledge synthesis
    Open Antiviral Effect
    →

Side effects

12 listed

Highest probability

  1. Skin Rash / IrritationCertaintyMediumSourceClinical8 cited studies · 2 other sources

    A 2023 case series of 409 people described necrosis, ulceration, or scarring of normal tissue; a 2013 case series of 11 also reported scarring.

    What the sources found

    0 not observed · 0 unclear · 10 reportedconfidence 45/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Rating adjusted

    Lowered from High to Medium after checking study quality: journal, risk of bias, trial size and design.

    Why this rating

    • A reviewer set it to High · curator approved
    • A reviewer set it to Medium · Re-confirm medium. Black salve is an escharotic (a corrosive paste), so burns and tissue necrosis are how it works. Eight case reports and series show this, including a 409-patient histopathology series where it killed normal tissue on benign lesions. All the evidence is case-level with no trials, so medium is the highest rating the few-own-studies cap allows.

    Who was studied

    • Healthy people and patients
    • Cancer (General)
    • Colon Cancer
    • Melanoma
    • Skin Cancer

    Where the evidence comes from

    • Article8
    • Community reports1
    • Reference knowledge1
    Show studies (10)
    Case seriesDnegativen=40942% confidence2023

    Persisting Cancer in Black Salve Treated Skin Lesions: Results of a Large 5 Year Retrospective Analysis of Australian Histopathology Specimens.

    Necrosis/ulceration/scarring of normal tissue

    Top journalNo control group
    Case seriesDnegativen=245% confidence2010

    An Internet misadventure: bloodroot salve toxicity.

    Lesion ulceration and purulence with progression to malignant melanoma diagnosis after bloodroot salve use

    Low-quality journalOpen-labelNo control group
    Case reportDnegativen=145% confidence2018

    Naturopathic Self-Treatment of an Atypical Fibroxanthoma: Lessons for Dermatologic Surgery.

    Severe burn of the scalp extending to 20% of scalp surface area

    No control group
    Case reportDnegativen=145% confidence2015

    Black salve and bloodroot extract in dermatologic conditions.

    dermatitic plaque

    No control group
    Case reportDnegativen=145% confidence2025

    A case of compound X (black salve) self-treated melanoma in situ leading to hospitalization and extensive tissue damage.

    Full-thickness tissue necrosis

    Weak journalOpen-labelNo control group
    +4 more in Sources
    Open Skin Rash / Irritation
    →
Low probability(11)
  1. Skin BurnCertaintyLowSourceClinical5 cited studies

    A 2023 case series reported necrosis, ulceration, and scarring of normal tissue in 409 people. A 2010 case series described chemical escharotic tissue destruction at the application site in 2 people.

    What the sources found

    0 not observed · 0 unclear · 5 reportedconfidence 45/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Rating adjusted

    Lowered from Medium to Low after checking study quality: journal, risk of bias, trial size and design.

    Who was studied

    • Healthy people and patients
    • Colon Cancer
    • Skin Cancer

    Where the evidence comes from

    • Article5

    Protocol behind this outcome

    4 protocolsMeasured

    What the studies reporting this result did.

    Format
    Self-guided
    Supervision
    Self-guided

    Courses and single sessions · 1 repeated-course and 2 single-session protocols

    Show studies (5)
    Case seriesDnegativen=40945% confidence2023

    Persisting Cancer in Black Salve Treated Skin Lesions: Results of a Large 5 Year Retrospective Analysis of Australian Histopathology Specimens.

    Necrosis/ulceration/scarring of normal tissue

    Top journalNo control group
    Case seriesDnegativen=245% confidence2010

    An Internet misadventure: bloodroot salve toxicity.

    Chemical escharotic tissue destruction at application site

    Low-quality journalOpen-labelNo control group
    Case reportDnegativen=145% confidence2017

    Facial eschar following a single application of black salve.

    Facial eschar with progressive blackening and swelling at the application site

    Top journalNo control group
    Case reportDnegativen=147% confidence2018

    Naturopathic Self-Treatment of an Atypical Fibroxanthoma: Lessons for Dermatologic Surgery.

    Severe burn of the scalp extending to 20% of scalp surface area

    No control group
    Case reportDnegativen=145% confidence2015

    Black salve and bloodroot extract in dermatologic conditions.

    skin erosion

    No control group
    Open Skin Burn
    →
  2. Inflammation IncreaseCertaintyLowSourceClinical2 cited studies · 1 other source

    A 2013 case series involving 11 people with melanoma reported granulomatous inflammation; a 2014 case report described localized inflammation and ulceration at the application site.

    What the sources found

    0 not observed · 0 unclear · 3 reportedconfidence 53/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Rating adjusted

    Lowered from Medium to Low after checking study quality: journal, risk of bias, trial size and design.

    Who was studied

    • People with a condition
    • Melanoma

    Where the evidence comes from

    • Article2
    • Reference knowledge1
    Show studies (3)
    Case reportDnegativen=145% confidence2014

    Application of black salve to a thin melanoma that subsequently progressed to metastatic melanoma: a case study.

    Localized inflammation and ulceration at application site

    No control group
    Reference knowledgenegative75% confidence

    Intense local inflammation and swelling in response to the caustic injury, which can extend beyond the application site

    Open Inflammation Increase
    →
  3. PainCertaintyLowSourceClinical2 cited studies · 2 other sources

    A 2010 case series described intense pain during bloodroot treatment in 2 people, and a 2023 case report described burning pain.

    What the sources found

    0 not observed · 0 unclear · 4 reportedconfidence 46/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Who was studied

    • Healthy people and patients
    • Colon Cancer
    • Skin Cancer

    Where the evidence comes from

    • Article2
    • Community reports1
    • Reference knowledge1
    Show studies (4)
    Case seriesDnegativen=245% confidence2010

    An Internet misadventure: bloodroot salve toxicity.

    Intense pain during bloodroot treatment

    Low-quality journalOpen-labelNo control group
    Case reportDnegativen=140% confidence2023

    Black Salve: A Dangerous Corrosive Disguised as an Alternative Medicine.

    Burning pain

    Low-quality journalNo control group
    Reference knowledgenegative80% confidence

    Application commonly causes significant burning pain and pain from the resulting ulcerative tissue injury.

    Community reportsnegative20% confidence

    This effect was mentioned in 2 of 22 YouTube videos discussing it.

    Open Pain
    →
  4. Menstrual Cycle ChangesCertaintyLowSourceClinical1 cited study

    A 2020 case report described oligomenorrhea.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 45/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Who was studied

    • People with a condition
    • Pcos

    Where the evidence comes from

    • Article1
    Show studies (1)
    Open Menstrual Cycle Changes
    →
  5. Injury Risk IncreaseCertaintyLowSourceReference knowledge1 other source

    A pharmacology reference warns that uncontrolled tissue destruction can cause permanent scarring, disfigurement, and functional impairment.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 80/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative80% confidence

    High risk of permanent scarring, disfigurement, and functional impairment due to uncontrolled tissue destruction

    Open Injury Risk Increase
    →
  6. Peripheral Nerve DamageCertaintyLowSourceReference knowledge1 other source

    Deep tissue destruction may injure skin or deeper nerves, potentially causing persistent numbness, altered sensation, or neuropathic pain.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 70/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative70% confidence

    Deep tissue destruction may injure cutaneous or deeper nerves, producing persistent numbness, altered sensation, or neuropathic pain.

    Open Peripheral Nerve Damage
    →
  7. Allergic ReactionCertaintyLowSourceReference knowledge1 other source

    Bloodroot constituents or product excipients may trigger localized or systemic hypersensitivity reactions.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 57/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative57% confidence

    Botanical bloodroot constituents or product excipients may provoke localized or systemic hypersensitivity reactions.

    Open Allergic Reaction
    →
  8. NauseaCertaintyLowSourceReference knowledge1 other source

    Nausea may occur if toxic bloodroot alkaloids are absorbed systemically, especially when the salve is applied over large areas or damaged skin.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 49/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative49% confidence

    Nausea can occur with systemic absorption of toxic bloodroot alkaloids, especially after application over large areas or damaged skin.

    Open Nausea
    →
  9. DizzinessCertaintyLowSourceReference knowledge1 other source

    Systemic exposure to preparations containing sanguinarine may cause dizziness.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 46/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative46% confidence

    Dizziness may occur with systemic exposure to sanguinarine-containing preparations.

    Open Dizziness
    →
  10. VomitingCertaintyLowSourceReference knowledge1 other source

    Vomiting is a possible sign of systemic bloodroot toxicity when substantial absorption occurs.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 46/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative46% confidence

    Vomiting is a possible manifestation of systemic bloodroot toxicity when substantial absorption occurs.

    Open Vomiting
    →
  11. WeaknessCertaintyLowSourceReference knowledge1 other source

    Generalized weakness may accompany systemic toxicity or significant tissue injury from black salve.

    What the sources found

    0 not observed · 0 unclear · 1 reportedconfidence 43/100

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Where the evidence comes from

    • Reference knowledge1
    Show studies (1)
    Reference knowledgenegative43% confidence

    Generalized weakness may accompany systemic toxicity or significant tissue injury from black salve.

    Open Weakness
    →

Don't do it if

When to skip it or get medical advice first8 listed

Highest probability

  1. MelanomaCertaintyHighSourceClinical2 cited studies

    Case reports describe melanoma progression after application, as well as tissue necrosis and cellulitis after self-treatment; they provide no evidence of efficacy. Earlier reports also describe incomplete eradication and progression.

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Why this rating

    • A reviewer set it to High · curator approved

    Who was studied

    • People with a condition
    • Melanoma

    Protocol behind this outcome

    2 protocolsEstimated

    What the studies reporting this result did.

    Format
    Self-guided
    Supervision
    Self-guided

    Courses and single sessions · 1 repeated-course and 1 single-session protocols

    Rationale

    Case report showing progression of melanoma after black salve application; no evidence of efficacy.

    Show studies (2)
    Case reportDn=120% confidence2014

    Application of black salve to a thin melanoma that subsequently progressed to metastatic melanoma: a case study.

    Case report showing progression of melanoma after black salve application; no evidence of efficacy.

    No control group
    Case reportDn=120% confidence2025

    A case of compound X (black salve) self-treated melanoma in situ leading to hospitalization and extensive tissue damage.

    Case report of self-treatment leading to tissue necrosis and cellulitis; prior cases show incomplete eradication and progression.

    Weak journalOpen-labelNo control group
    Open Melanoma
    →
  2. Cancer (General)CertaintyHighSourceClinical1 cited study

    A 2023 case series reported cancer persistence in 28.8% after treatment, including cancers that may have been metastatic.

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Why this rating

    • A reviewer set it to Medium · curator approved
    • A reviewer set it to High · curator approved

    Who was studied

    • People with a condition
    • Cancer (General)

    Rationale

    High rates of cancer persistence (28.8%) after black salve treatment, including potentially metastatic cancers.

    Show studies (1)
    Case seriesDn=40940% confidence2023

    Persisting Cancer in Black Salve Treated Skin Lesions: Results of a Large 5 Year Retrospective Analysis of Australian Histopathology Specimens.

    High rates of cancer persistence (28.8%) after black salve treatment, including potentially metastatic cancers.

    Top journalNo control group
    Open Cancer (General)
    →
Medium probability(1)
  1. Skin CancerCertaintyMediumSourceClinical2 cited studies

    A 2023 case series found cancer persisted after black salve treatment in 28.8% of cases, including potentially metastatic cancers. Caustic destruction can obscure pathology, leave malignant tissue behind, and delay effective cancer care.

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Why this rating

    • A reviewer set it to Medium · curator approved
    • A reviewer set it to Medium · Case series show cancer persisted after black salve in 28.8% of 409 cases (36718525) and residual or masked carcinoma (24150196). Destroying a suspected skin cancer with caustic paste delays real treatment and hides what is left. medium stands on today's evidence.

    Who was studied

    • People with a condition
    • Skin Cancer

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 85/100

    Rationale

    A known or suspected malignant skin lesion requires diagnostic biopsy and definitive treatment; caustic destruction can obscure pathology, leave malignant tissue behind, and delay effective cancer care.

    Show studies (2)
    Case seriesDn=40940% confidence2023

    Persisting Cancer in Black Salve Treated Skin Lesions: Results of a Large 5 Year Retrospective Analysis of Australian Histopathology Specimens.

    High rates of cancer persistence (28.8%) after black salve treatment, including potentially metastatic cancers.

    Top journalNo control group
    Case seriesDn=1130% confidence2013

    Histopathological features associated with application of black salve to cutaneous lesions: a series of 16 cases and review of the literature.

    Residual basal cell carcinoma was found in one of 16 cases after black salve use, and the literature review describes malignant tumours masked by uncontrolled escharotic treatment.

    No control group
    Open Skin Cancer
    →
Low probability(5)
  1. Diabetes Type 2CertaintyLowSourceClinical1 cited study

    A 2022 case report noted that uncontrolled diabetes may increase the risk of wound-healing complications.

    How big is the effect

    No study gave a number we could compare, so the size is not known.

    Who was studied

    • People with a condition
    • Diabetes Type 2
    • Neuropathy Peripheral

    Protocol behind this outcome

    1 protocolMeasured

    What the studies reporting this result did.

    Format
    Self-guided
    Supervision
    Self-guided

    A repeated course

    Rationale

    Paper notes patients with uncontrolled diabetes may be at risk for complications related to wound healing.

    Show studies (1)
    Case reportDn=120% confidence2022

    Black salve: risky escharotic.

    Paper notes patients with uncontrolled diabetes may be at risk for complications related to wound healing.

    Weak journalNo control group
    Open Diabetes Type 2
    →
  2. WoundCertaintyLowSourceReference knowledgeTheoretical

    On open or broken skin, the corrosive paste can deepen and enlarge the wound, causing excessive tissue loss and delayed healing.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 80/100

    Rationale

    Open wound or broken skin at the application site — the corrosive paste will deepen and enlarge the wound, causing excessive tissue loss and delayed healing

    Open Wound
    →
  3. Bleeding DisordersCertaintyLowSourceReference knowledgeTheoretical

    Caustic tissue destruction creates open wounds that can carry a high risk of prolonged or severe bleeding when blood clotting is impaired, including with hemophilia, thrombocytopenia, or anticoagulant use.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 75/100

    Rationale

    Impaired hemostasis (e.g., hemophilia, thrombocytopenia, anticoagulant use) — the caustic destruction of tissue creates open wounds with a high risk of prolonged or severe bleeding

    Open Bleeding Disorders
    →
  4. PregnancyCertaintyLowSourceReference knowledgeTheoretical

    Sanguinarine has uterine-stimulant and embryotoxic effects in animal models and can cross biological membranes. If absorbed through damaged skin, it poses a theoretical risk of miscarriage or fetal harm.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 75/100

    Rationale

    Sanguinarine crosses biological membranes and has uterine stimulant and embryotoxic effects in animal models; systemic absorption via damaged skin poses theoretical risk of miscarriage or fetal harm.

    Open Pregnancy
    →
  5. BreastfeedingCertaintyLowSourceReference knowledgeTheoretical

    Animal studies report that sanguinarine is excreted in breast milk. If it is absorbed through the mother’s skin, this could expose the infant to toxicity.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 70/100

    Rationale

    Sanguinarine is excreted in breast milk in animal studies; potential exposure to infant via systemic absorption in mother from topical application poses risk of toxicity.

    Open Breastfeeding
    →

Interactions

Dangerous combinations

Highest severity first

  1. PracticesDerma Rolling (Microneedling)TheoreticalSerious

    Microneedling Derma Rolling can create channels that carry sanguinarine and zinc chloride deeper into tissue, increasing chemical injury, necrosis, scarring, and possible systemic absorption when used with Black Salve.

    Where the evidence comes from

    • Expert opinion

    Confidence

    confidence 53/100

    Open Derma Rolling (Microneedling)
    →
  2. SupplementsGinkgo BilobaTheoreticalCaution

    Ginkgo Biloba can reduce platelet clumping, so using it while Black Salve burns an open skin wound may increase bleeding or oozing at the treated site.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 80/100

    Open Ginkgo Biloba
    →
  3. SupplementsOmega-3TheoreticalCaution

    Fish oil has blood-thinning properties, which may increase the risk of excessive bleeding or prolonged oozing where Black Salve has destroyed tissue.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 80/100

    Open Omega-3
    →
  4. SupplementsBromelainTheoreticalCaution

    Bromelain has antiplatelet and proteolytic activity. With the deep necrotic ulcer Black Salve can produce, it may increase bruising and bleeding and delay hemostasis.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 76/100

    Open Bromelain
    →
  5. SupplementsAloe VeraTheoreticalCaution

    Topical Aloe Vera may irritate skin injured by Black Salve or complicate wound care. Applying it to these lesions should be avoided unless directed by a clinician.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 75/100

    Open Aloe Vera
    →
  6. SupplementsGarlicTheoreticalCaution

    Garlic's antiplatelet activity may worsen bleeding at the site where Black Salve is applied.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 70/100

    Open Garlic
    →
Unrated(3)
  1. SupplementsVitamin ETheoreticalCaution

    On tissue damaged by Black Salve, topical Vitamin E may trap irritants and delay healing; it may also worsen inflammation and increase the risk of infection or keloid formation.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 70/100

    Open Vitamin E
    →
  2. SupplementsChondroitin SulfateTheoreticalCaution

    Chondroitin Sulfate may impair platelet-mediated clotting, potentially increasing bleeding from tissue ulcerated by Black Salve, particularly after extensive applications.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 68/100

    Open Chondroitin Sulfate
    →
  3. SupplementsCod Liver OilTheoreticalCaution

    High-dose Cod Liver Oil provides omega-3 fatty acids that can reduce platelet aggregation, potentially adding to bleeding from tissue necrosis caused by Black Salve.

    Where the evidence comes from

    • Reference knowledge

    Confidence

    confidence 65/100

    Open Cod Liver Oil
    →

Weakens or is weakened by

Highest probability

  1. PracticesHyperbaric Oxygen Therapy (HBOT)CertaintyMediumSourceTheoreticalCompetitive

    Hyperbaric Oxygen Therapy (HBOT) enhances wound healing and angiogenesis, potentially reducing Black Salve’s escharotic action.

    Where the evidence comes from

    • Expert opinion

    Confidence

    confidence 50/100

    Open Hyperbaric Oxygen Therapy (HBOT)
    →
  2. PracticesRed Light Therapy (Photobiomodulation)CertaintyMediumSourceTheoreticalCompetitive

    Red Light Therapy (Photobiomodulation) promotes wound healing and tissue repair, which may counteract the corrosive effect intended with Black Salve.

    Where the evidence comes from

    • Expert opinion

    Confidence

    confidence 50/100

    Open Red Light Therapy (Photobiomodulation)
    →

Community experience

Based on 30 public posts from YouTube, Reddit, and Hacker News.

Signal found5 signals3 platforms
YouTube 22Reddit 7Hacker News 1

What people report it did

2 outcomes mentioned across 30 public reports. A report often mentions several, so these counts do not add up to the total.

Reported benefits2

References

13 screened · 12 analysed · 13 listed below

Studies and sources cited on this page. Evidence quality varies — check the grade on each.

  1. A case of compound X (black salve) self-treated melanoma in situ leading to hospitalization and extensive tissue damage.JAAD Case Rep2025Case reportDn=1
  2. Basal Cell Carcinoma Self-Treated With an Escharotic Agent (Black Salve) and Timeline of Cutaneous Responses.Cureus2025Case reportDn=1
  3. Black Salve: A Dangerous Corrosive Disguised as an Alternative Medicine.Cureus2023Case reportDn=1
  4. Persisting Cancer in Black Salve Treated Skin Lesions: Results of a Large 5 Year Retrospective Analysis of Australian Histopathology Specimens.Integr Cancer Ther2023Case seriesDn=409
  5. Black salve: risky escharotic.Scars Burn Heal2022Case reportDn=1
  6. Intravaginal Application of Topical Black Salve for High-Grade Cervical Intraepithelial Neoplasia.Ochsner J2020Case reportDn=1
  7. Naturopathic Self-Treatment of an Atypical Fibroxanthoma: Lessons for Dermatologic Surgery.J Drugs Dermatol2018Case reportDn=1
  8. Facial eschar following a single application of black salve.Clin Toxicol (Phila)2017Case reportDn=1
  9. Black salve and bloodroot extract in dermatologic conditions.Cutis2015Case reportDn=1
  10. Application of black salve to a thin melanoma that subsequently progressed to metastatic melanoma: a case study.Dermatol Pract Concept2014Case reportDn=1
Show all 13 references
  1. Histopathological features associated with application of black salve to cutaneous lesions: a series of 16 cases and review of the literature.2013Case seriesDn=11
  2. An Internet misadventure: bloodroot salve toxicity.2010Case seriesDn=2
  3. Expert knowledge synthesis

Diatelos provides general wellness information based on published research. It is not medical advice. Talk to a clinician before starting any new supplement or practice, especially if you have a health condition, are pregnant, or take medication.