Proton Pump Inhibitors (PPIs): What It Depletes and How to Replenish

PPIs reduce gastric acid needed for magnesium absorption in the duodenum. The FDA issued a black box warning in 2011 for hypomagnesemia in PPI users. Risk increases significantly after 1+ year of use.

FDA Drug Safety Communication (2011); Cundy & Mackay (2011) — 13 cases of severe hypomagnesemia in PPI users

Muscle cramps, tremors, cardiac arrhythmia, hypertension, fatigue, anxiety

B12 absorption requires gastric acid to cleave it from food proteins. PPIs suppress acid production, dramatically reducing food-bound B12 absorption. Crystalline B12 in supplements bypasses this.

Lam et al. (2013) JAMA — 65% increased risk of B12 deficiency with 2+ years PPI use

Cognitive decline, peripheral neuropathy, fatigue, elevated homocysteine

Gastric acid is required for zinc ionization and absorption. PPI use reduces zinc bioavailability by 40–50%.

Sturniolo et al. (1991) — significant zinc depletion with acid suppression therapy

Immune suppression, wound healing delay, taste/smell changes, skin issues

Ascorbic acid (Vitamin C) in the stomach is converted from dietary sources partly via acid-dependent mechanisms. PPI users show lower gastric and serum Vitamin C.

Rune et al. (1998) — significantly lower gastric Vitamin C concentrations in PPI vs. non-PPI users

Immune impairment, oxidative stress, slower tissue repair

Non-heme iron (from plants) requires an acidic environment for conversion to absorbable ferrous form. PPI use impairs this conversion.

Hutchinson et al. (2007) — significantly impaired iron absorption with acid suppression

Fatigue, anemia, cold intolerance, cognitive fog