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Drug Nutrient Depletion Guide

SSRIs (Antidepressants): What It Depletes and How to Replenish

SSRIs (Antidepressants) (Zoloft, Prozac, Lexapro, Celexa) is associated with clinically documented depletion of 3 key nutrients. Below you'll find the mechanism, clinical evidence, and evidence-based replenishment protocols for each.

This page is educational content based on published clinical trials. All supplement recommendations should be discussed with your prescribing physician before implementation. Evidence ratings follow the same RCT-first methodology used across the full Evidence Based Longevity database.
3 Documented Depletions · RCT Evidence
1
Melatonin
Moderate Depletion Risk
How It Depletes

SSRIs alter serotonin availability — serotonin is the precursor to melatonin. Chronic SSRI use can disrupt the serotonin→melatonin conversion cycle, affecting sleep architecture.

Clinical Evidence

Sharpley et al. (1994) — documented sleep architecture changes and melatonin alteration with SSRIs

Symptoms of Deficiency

Insomnia, poor sleep quality, fatigue, vivid dreams

Evidence-Based Replenishment

Melatonin 0.5–1mg before bed. Low doses are more physiological — consult prescriber for timing.

View on Fullscript: Life Extension Melatonin 300mcg

Discuss with your physician before adjusting supplementation. This is educational content, not medical advice.

2
Folate (Methylfolate)
Moderate Depletion Risk
How It Depletes

Several SSRIs (especially fluoxetine) inhibit folate-dependent enzyme activity. Low folate predicts SSRI non-response. L-methylfolate is now used as an adjunct to improve antidepressant outcomes.

Clinical Evidence

Papakostas et al. (2012) — L-methylfolate addition significantly improved SSRI response rate in treatment-resistant depression

Symptoms of Deficiency

Antidepressant non-response, elevated homocysteine, mood instability

Evidence-Based Replenishment

L-Methylfolate 7.5–15mg daily (prescription doses used clinically; 400–800mcg OTC for maintenance).

View on Fullscript: Thorne 5-MTHF (Methylfolate)

Discuss with your physician before adjusting supplementation. This is educational content, not medical advice.

3
Sodium / Electrolytes
Moderate Depletion Risk
How It Depletes

SSRIs can cause SIADH (syndrome of inappropriate antidiuretic hormone secretion), leading to hyponatremia — especially in older adults.

Clinical Evidence

Kirby & Ames (2001) — hyponatremia in SSRI users, most common in elderly and those on diuretics

Symptoms of Deficiency

Confusion, fatigue, nausea, headache (in severe cases: seizures)

Evidence-Based Replenishment

Monitor sodium levels, especially in older adults or those also taking diuretics.

Discuss with your physician before adjusting supplementation. This is educational content, not medical advice.

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