health
Nutrient Depletion
Adverse effectNutrient Depletion is an adverse health-related effect in which nutrient reserves or availability decline, contributing to nutritional stress. The nutrients involved can vary, including vitamin C, other antioxidant reserves, iron, biotin, or thiamine.
Nutrient Depletion is categorized as a health-related effect, with its meaning presented in a concise, accessible format.
These are research findings, not promises. Most options have little evidence, and results differ from person to person.
What can cause it
How likely each one is to cause it, most likely first.
FastingpracticeUnclear
Based on 2 studies. Strongest study: a systematic review of studies.
A 2026 review described randomized trials of alternate-day fasting and time-restricted eating reporting reduced intake of calcium, magnesium, potassium, folate, vitamin C, and B-complex vitamins. A 2025 systematic review also associated Ramadan fasting during the third trimester, or during both the second and third trimesters, with birth weight reductions of 60 g and 80 g, respectively.
Open the Fasting pageOzone TherapypracticeUnclear
Based on one study. Strongest study: a pooled analysis of several trials.
In pooled human studies in people with Covid 19, albumin decreased in the ozone group.
Open the Ozone Therapy pageSwimmingpracticeUnclear
Based on one study.
Heavy endurance training can raise hepcidin after sessions, potentially lowering iron stores over time, mainly in female athletes with high training loads.
Open the Swimming pageCoffee EnemapracticeUnclear
Based on one study.
Repeated diarrhea or frequent enemas may contribute to depletion of water-soluble nutrients and electrolytes.
Open the Coffee Enema page
The expert view shows every study, dose protocol and source.
What can cause it
Interventions reported to bring this on4 listedHighest probability
- →PracticesFastingCertaintyLowSourceClinical2 other sources
A 2026 review described randomized trials of alternate-day fasting and time-restricted eating reporting reduced intake of calcium, magnesium, potassium, folate, vitamin C, and B-complex vitamins. A 2025 systematic review also associated Ramadan fasting during the third trimester, or during both the second and third trimesters, with birth weight reductions of 60 g (P < 0.007) and 80 g (P = 0.03), respectively.
Who was studied
- Healthy people and patients
Open FastingStudy result
maternal Ramadan fasting during the third trimester or both the second and the third trimester of pregnancy was associated with reduced birth weight by 60 g (P < 0.007) and 80 g (P = 0.03), respectively
- →PracticesOzone TherapyCertaintyLowSourceClinical1 other source
In pooled human studies in people with Covid 19, albumin decreased in the ozone group (MD = –0.26 g/dL, *P* = 0.007, I2 = 0, fixed-effect).
Who was studied
- People with a condition
- Covid 19
Open Ozone TherapyStudy result
the albumin level decreased in the OZ group (MD = –0.26 g/dL, *P* = 0.007, I2 = 0, fixed-effect)
- →PracticesSwimmingCertaintyLowSourceReference knowledge1 other source
Heavy endurance training can raise hepcidin after sessions, potentially lowering iron stores over time, mainly in female athletes with high training loads.
Open SwimmingStudy result
Heavy endurance training raises the iron-regulating hormone hepcidin after sessions, which can lower iron stores over time, mainly in female athletes with high training loads.
- →PracticesCoffee EnemaCertaintyLowSourceTheoretical1 other source
Repeated diarrhea or frequent enemas may contribute to depletion of water-soluble nutrients and electrolytes.
Open Coffee EnemaStudy result
Repeated diarrhea or frequent enemas can contribute to depletion of water-soluble nutrients and electrolytes.
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
Nutrient Depletion is an adverse health-related effect in which nutrient reserves or availability decline, contributing to nutritional stress. The nutrients involved can vary, including vitamin C, other antioxidant reserves, iron, biotin, or thiamine. It may be associated with factors such as Cigarette Smoking, Swimming, Alpha-Lipoic Acid (ALA), or Curcumin, but the specific nutrient affected depends on the factor and circumstances.
How interventions help
Nutrient depletion can arise through several distinct pathways rather than one shared mechanism. Some exposures increase metabolic or oxidative demand, which can use up nutrient reserves more quickly. Others may interfere with absorption, transport, conversion, or availability of a nutrient. Depletion can also result when one substance replaces a broader dietary source, or when repeated fluid and gastrointestinal losses remove water-soluble nutrients and electrolytes.
The practical implications differ by exposure pattern. Concerns described here are generally linked to long-term or high intake, extensive dietary replacement, repeated losses, or a pre-existing marginal nutrient status rather than a single isolated use. This means the same intervention may have different relevance depending on how it is used and what nutritional reserves are present beforehand.
The potential effects span antioxidant reserves, biotin, thiamine, iron, niacin, essential fatty acids, vitamin E, and electrolytes. These are not interchangeable forms of depletion: a mechanism involving nutrient binding or competition differs from one involving increased turnover or physical loss. The available findings do not establish a common onset time, required duration, or whether changes persist after an exposure stops, so the outcome should be interpreted in the context of the specific intervention and pattern of use.
Choosing guidance
When comparing these options, first consider the exposure pattern behind the concern. Several potential depletion effects are described only with sustained, high-dose, extensive replacement, or repeated use, so they are more relevant to people considering ongoing regimens than to someone evaluating a single exposure. No specific dose, duration, or onset time is provided, so the options cannot be compared reliably by how much is required or how quickly depletion might appear.
The evidence also differs in kind. One option has clinical evidence from a quasi-experimental study, while other concerns come from pharmacology references or theoretical reasoning. This means the findings do not all represent the same level of direct observation in humans, and the clinical relevance may vary with a person’s nutritional status, diet, and pattern of use. Health status was not specified for the studied populations.
For practical selection, people considering long-term or high-dose use should focus on whether the proposed regimen matches the exposure conditions described, while those considering extensive dietary replacement or repeated procedures should examine how that choice fits with overall nutrient and electrolyte intake. Where studies or evidence types differ, treat the entries as distinct kinds of information rather than as directly interchangeable estimates of risk.