Porphyria
Porphyria is a metabolic condition. This classification places it among conditions related to metabolism.
Porphyria is categorized as a metabolic condition. Start with a clear overview of its classification.
This list shows research findings, not treatments. Nothing here replaces medical care. If you have this condition, talk to a doctor.
May not suit people with this condition
Supplements and practices linked to problems for people with this condition.
FastingpracticeUnclear
Calorie restriction and fasting can activate the hepatic heme pathway and precipitate acute porphyria attacks; carbohydrate loading is part of attack treatment.
Open the Fasting pageRed Light Therapy (Photobiomodulation)practiceUnclear
Porphyrias can involve extreme sensitivity to light, including visible wavelengths, and red light therapy could provoke a painful reaction.
Open the Red Light Therapy (Photobiomodulation) page
The expert view shows every study, dose protocol and source.
What may help
Interventions recorded as helping with this conditionNothing in this library is currently recorded as helping with Porphyria. That means nothing is on file — not that nothing exists. Only 107 of 338 catalogued supplements have a written-up profile so far.
What to avoid
Interventions recorded as making it worse2 listedHighest probability
- →PracticesFastingCertaintyLowSourceReference knowledge
Calorie restriction and fasting can activate the hepatic heme pathway and precipitate acute porphyria attacks; carbohydrate loading is part of attack treatment.
Open FastingRationale
Calorie restriction and fasting induce hepatic heme-pathway activity (ALAS1) and can precipitate acute porphyria attacks. Carbohydrate loading is part of attack treatment.
- →PracticesRed Light Therapy (Photobiomodulation)CertaintyLowSourceReference knowledge
Porphyrias can involve extreme sensitivity to light, including visible wavelengths, and red light therapy could provoke a painful reaction.
Open Red Light Therapy (Photobiomodulation)Rationale
Porphyrias cause extreme sensitivity to light, including visible wavelengths, and red light therapy could provoke a painful reaction.
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.
Full write-up
What is it
Porphyria is a metabolic condition. This classification places it among conditions related to metabolism. The available description does not provide further details about symptoms, causes, types, or how it may affect daily life.
Evidence-backed options
No evidence-backed options are listed for Porphyria here. Questions about treatment or supportive options should be discussed with a qualified clinician.
What to avoid
Several items are flagged because they may affect pathways involved in porphyria attacks or skin sensitivity. Iron is a concern when it contributes to iron overload, which can trigger acute attacks of porphyria cutanea tarda. Iron supplementation is contraindicated in active porphyria.
St. John's Wort may pose two separate concerns. Its hepatic enzyme induction may precipitate acute porphyria attacks, while hypericin-mediated photosensitization may aggravate cutaneous porphyria. These mechanisms are relevant to both acute attack risk and skin manifestations.
CBD (Cannabidiol) is flagged because cannabinoids may trigger acute porphyric attacks through effects on CYP450 enzymes. It is described as contraindicated in all porphyria types. Ozone Therapy is flagged based on its physiological properties, although the stated rationale does not specify a more detailed mechanism.
Because porphyria includes different types and may involve acute or cutaneous manifestations, the relevance of these concerns can depend on the individual condition. Anyone with porphyria should review these options with a clinician before use, particularly when considering Iron supplementation or products that may affect liver enzymes or photosensitivity.