Home › Drug Nutrient Depletions › Diuretics (Water Pills)
Drug Nutrient Depletion Guide

Diuretics (Water Pills): What It Depletes and How to Replenish

Diuretics (Water Pills) (Hydrochlorothiazide, Furosemide (Lasix), Chlorthalidone) is associated with clinically documented depletion of 4 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.
4 Documented Depletions · RCT Evidence
1
Magnesium
Critical Depletion Risk
How It Depletes

Loop and thiazide diuretics increase urinary excretion of magnesium. Magnesium depletion is one of the most consistent findings with long-term diuretic use.

Clinical Evidence

Ryan (1987) — documented magnesium wasting with thiazides; Whang et al. (1990) meta-analysis

Symptoms of Deficiency

Cardiac arrhythmia, muscle cramps, hypertension (paradoxically worsens), fatigue

Evidence-Based Replenishment

Magnesium bisglycinate 300–400mg daily. Monitor serum magnesium every 6 months — low magnesium impairs potassium repletion.

View on Fullscript: Thorne Magnesium Bisglycinate

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

2
Potassium
Critical Depletion Risk
How It Depletes

Loop and thiazide diuretics directly increase renal potassium excretion. Hypokalemia is the most well-recognized and dangerous diuretic side effect.

Clinical Evidence

Siscovick et al. (1994) JAMA — low potassium from diuretic use linked to cardiac arrest risk

Symptoms of Deficiency

Muscle weakness, cardiac arrhythmia, fatigue, hypertension

Evidence-Based Replenishment

Dietary potassium (bananas, leafy greens, avocado) first. Supplement only under physician guidance — potassium dosing requires monitoring.

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

3
Zinc
Moderate Depletion Risk
How It Depletes

Thiazide diuretics increase urinary zinc excretion — documented in multiple studies of long-term use.

Clinical Evidence

Oster et al. (1989) — significant zinc losses with hydrochlorothiazide

Symptoms of Deficiency

Immune suppression, taste changes, wound healing impairment

Evidence-Based Replenishment

Zinc bisglycinate 15mg daily with food.

View on Fullscript: Thorne Zinc Picolinate 15mg

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

4
B Vitamins (B1, B6)
Moderate Depletion Risk
How It Depletes

Loop diuretics (furosemide) increase urinary B1 (thiamine) excretion significantly. Thiamine deficiency in heart failure patients on furosemide is a documented clinical problem.

Clinical Evidence

Seligmann et al. (1991) — 33% thiamine deficiency in CHF patients on furosemide

Symptoms of Deficiency

Fatigue, nerve damage, heart dysfunction, cognitive impairment

Evidence-Based Replenishment

B-complex or thiamine 50–100mg daily if on loop diuretics long-term.

View on Fullscript: Thorne Basic B Complex

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

Taking Diuretics (Water Pills)? Build Your Replenishment Stack.

Our 13-question quiz accounts for your medications, health goals, and risk factors — and outputs a personalized supplement protocol rated against published clinical trials.

Take the Free Quiz

Other Drug Depletion Guides