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Acid Blockers and Vitamin and Mineral Depletion

Acid blocker use is associated with depleted levels of several critical vitamins and minerals. Learn which ones and how to avoid depletion.

By inhibiting gastric acid secretion, acid blockers interfere with absorption and bioavailability of critical vitamins and minerals.

Proton pump inhibitors, part of a larger acid blocker class of drugs, have consistently demonstrated their effectiveness for treating multiple conditions while maintaining a “favorable safety profile.”1 That is to say, their use comes with an extremely low theoretical risk of developing conditions like stomach cancer.

Because they have been seen as a safe panacea, researchers are concerned that they may be overprescribed, particularly to patients outside of a hospital setting. Indeed, studies prove that proton pump inhibitors are overprescribed to treat stress ulcers in non-intensive care patients. While researchers have created guidelines to avoid prescribing chronic use of these drugs, few clinicians follow them. Contributing to this overuse is that 80% of acid blockers are available without a prescription.1

In 2010, proton pump inhibitor sales were almost $10 billion in the US alone.1

Maybe if the public understood that “safety” means little more than a lack of a link to cancer, they would question the need for chronic use of a prescription. Maybe the presence of so many of these drugs on the shelf at every drug store and grocery store, and even gas station, gives the false sense that they are as innocuous as the saline nasal mist, the bandages, and the cough drops in the aisle.

Since the mid-2000s, researchers noted numerous potential adverse effects of proton pump inhibitors, including increased risk of enteric infections, community-acquired pneumonia, and fracture related to osteoporosis. In 2010, acid blockers’ interference with vitamin and mineral absorption finally started to receive attention.1

While the general population can likely manage these potential depletions, elderly and malnourished patients as well as those undergoing dialysis or taking multiple proton pump inhibitors are at risk for severe deficiencies.

Acid blockers raise risk of B12 deficiency

The omnivorous Western diet provides substantially more B12 than needed for normal cognitive function and metabolism, assuming no interference with absorption. Bound to dietary protein, B12 requires an enzyme to be extracted for subsequent absorption. Gastric acid activates the enzyme, thus the acid suppression mediated by proton pump inhibitors may interfere with the ability to absorb B12.1

In a 2013 study, researchers concluded that taking acid blockers raised the risk of B12 deficiency. Younger people and women were at the highest risk, which nullified when the drug was ceased. They also noted the risk was greater when the dose was higher.2

Other studies have found relationships between proton pump inhibitor use and low B12 in some people, but the research remains inconclusive and literature review authors warn that many of the studies were poorly controlled.

Even without the use of medications, gastric acid declines as we age. About 20% of elderly people are B12 deficient. According to multiple researchers, it is worth monitoring B12 status in elderly people taking PPIs while likely not much of a concern in the general population.3

Types of proton pump inhibitors/acid blockers known to deplete B12

Cimetidine, Esomeprazole, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

Example B12 depletion symptoms

  • Jaundiced or pale skin
  • Fatigue
  • Weakness
  • Swollen, red tongue
  • Dizziness

    Acid blockers lower active Vitamin C

    Proton pump inhibitors lower Vitamin C concentration in gastric juices, disproportionately affecting its biologically active, antioxidant form, ascorbic acid. Scientists found a “notable decrease” in Vitamin C concentrations in patients taking omeprazole for four weeks.5

    Types of proton pump inhibitors/acid blockers known to deplete Vitamin C

    Cimetidine, Esomeprazole, Famotidine, Lansoprazole, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

    Example Vitamin C depletion symptoms

    • Dry, splitting hair or nails
    • Easy bruising
    • Slow-healing wounds
    • Frequent nosebleeds
    • Unexplained weight gain

      Acid blocker-induced Vitamin C depletion may affect iron levels

      Some researchers believe this proton pump inhibitor-induced Vitamin C depletion contributes to the non-heme iron depletion associated with use of this drug class.6 Non-heme iron, the type found in plants, requires Vitamin C for absorption. The iron depletion effects may be significant.

      Types of proton pump inhibitors/acid blockers known to deplete iron

      Cimetidine, Esomeprazole, Famotidine, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

      Example iron depletion symptoms

      • Fatigue
      • Pale skin
      • Weakness
      • Cold hands and feet
      • Shortness of breath

        FDA warns proton pump inhibitors deplete magnesium

        While rare, magnesium deficiency is a well-documented effect of many acid blockers. The FDA issued a warning about low magnesium levels and long-term proton pump inhibitor use in 2011.

        The vast majority of the documented cases occurred in people taking PPIs for at least 5 years, and the median age was 70.2 Researchers hypothesize that pH affects magnesium absorption, but the exact mechanisms remain unknown. Scientists also are unclear as to whether PPI-induced magnesium deficiency is common or whether it occurs only in certain people.7

        Types of proton pump inhibitors/acid blockers known to deplete magnesium

        Cimetidine, Esomeprazole, Famotidine, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

        Example magnesium depletion symptoms

        • Low mood
        • Loss of appetite
        • Muscle cramps
        • Fatigue
        • Constipation

          Acid blockers may deplete potassium

          Researchers say PPIs can deplete potassium by inhibiting absorption and increasing excretion.6

          Types of proton pump inhibitors/acid blockers known to deplete potassium

          Cimetidine, Esomeprazole, Famotidine, Lansoprazole, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

          Example potassium depletion symptoms

          • Muscle cramps
          • Digestive issues
          • Muscle aches
          • Mood changes
          • Trouble breathing

            Proton pump inhibitors are associated with lower zinc levels

            In multiple studies, low serum zinc levels were found in subjects taking proton pump inhibitors for at least seven days. The challenges to absorption seem to differ on the type of zinc administered. PPIs had fewer effects on zinc absorption from meals as opposed to supplements.

            Types of proton pump inhibitors/acid blockers known to deplete Iron

            Cimetidine, Esomeprazole, Famotidine, Lansoprazole, Nizatidine, Omeprazole, Pantoprazole, Rabeprazole, Ranitidine4

            Example zinc depletion symptoms

            • Impaired senses of smell and taste
            • Slow wound healing
            • Loss of appetite
            • Low mood
            • Joint pain

              Why replenish vitamins and minerals depleted by acid blockers?

              All the nutrients potentially depleted by long-term proton pump inhibitor use are critical to your body’s normal function. If you have low levels of these nutrients, your nerves, muscles, cardiac system, and brain will suffer.

              B12 is critical for proper nerve and blood cell health, and contributes to making DNA. Vitamin C is one of the most important nutrients for immune system health, as well as a powerful antioxidant. Iron is essential to make the protein that transports oxygen from the blood to the lungs. Magnesium supports more than 300 essential processes in the body. Potassium is critical for cardiac function. Zinc supports proper immune function and brain health.

              How to replenish nutrients depleted by acid blockers/proton pump inhibitors

              Ensuring that you consume optimal amounts of vitamins and minerals from food is difficult enough when processing, cooking, and mineral-depleted soil leave less nutrients in our meals. Over-reliance on nutrient-poor processed foods — particularly those containing the Vitamin C absorption saboteur sugar — exacerbate the problem. Add a prescription drug to the mix, and absorbing the required amounts of every nutrient becomes a real challenge.

              Iron may be the simplest potential depletion to avoid as acid blockers have demonstrated little interference with heme iron. Eating sources of heme iron (meat, poultry, seafood, eggs) instead of relying solely on non-heme (grains, legumes, nuts, fortified foods) should reduce the risk of proton pump inhibitor-induced deficiency.

              If you’re worried about potassium, the best value may be in the banana. Cooked spinach and broccoli, as well as melons and potatoes are also strong sources. Potassium can be dangerous in high doses, which is why standalone supplements are rare and often available by prescription only. Because the mineral is lost in sweat, many sports drinks and supplements include low doses. It’s also common in multivitamins.

              Magnesium is one of the most widespread deficiencies with experts claiming as many as 50% of US adults are deficient. So much of the magnesium content of foods is removed by lack of magnesium in soil and processing of grains. Magnesium is easy to supplement as long as you use an absorbable form like magnesium glycinate or magnesium citrate. Since it’s water-soluble and your body excretes any excess, there’s no danger to taking large doses. The issue with taking even the absorbable forms of magnesium in traditional oral forms is that they follow the same absorption pathways that may be compromised due to chronic acid blocker use. Liposomal magnesium supplements, like Lypo-Spheric® Magnesium, bypass these systems for superior absorption.

              Vitamin B12 is in a similar conundrum. Low levels are common in specific groups: in older people due to malnutrition and a natural decline in stomach acid, and in younger people due to vegetarian and vegan diets, and in people with digestive conditions that interfere with absorption. The problem with traditional supplements in the case of PPI-induced vitamin depletion is similar to the challenges magnesium faces. Again, a liposomal B complex supplement may be advisable. Author of Drug Muggers: Which Medications Are Robbing Your Body of Essential Nutrients — and Natural Ways to Restore Them, Suzy Cohen, RPh, recommends a B complex over B12 supplements as an influx of one B vitamin can cause a “relative deficiency” of others.

              Vitamin C is plentiful in many fruits and vegetables, and few people experience deficiency. Since the recommended daily allowance is just enough to avoid the potentially deadly chronic deficiency disease scurvy, doctors and researchers have been arguing for decades that the RDA is not enough for optimal health. Vitamin C supplements are some of the most common, yet often least effective due to absorption challenges. Liposomal supplements bypasses your body’s restrictive nutrient transport system to deliver Vitamin C into the bloodstream and the cells where it is needed.


              1 Heidelbaugh J. J. (2013). Proton pump inhibitors and risk of vitamin and mineral deficiency: evidence and clinical implications. Therapeutic advances in drug safety, 4(3), 125–133.

              2 Lam JR, Schneider JL, Zhao W, Corley DA (2013). Proton Pump Inhibitor and Histamine 2 Receptor Antagonist Use and Vitamin B12 Deficiency. JAMA. 310(22):2435–2442. doi:10.1001/jama.2013.280490

              3 Qorraj-Bytyqi, H., Hoxha, R., Sadiku, S., Bajraktari, I. H., Sopjani, M., Thaçi, K., Thaçi, S., & Bahtiri, E. (2018). Proton Pump Inhibitors Intake and Iron and Vitamin B12 Status: A Prospective Comparative Study with a Follow up of 12 Months. Open access Macedonian journal of medical sciences, 6(3), 442–446. doi:10.3889/oamjms.2018.142

              4 Cohen, Suzy, RPh. Drug Muggers: Which Medications Are Robbing Your Body of Essential Nutrients—and Natural Ways to Restore Them. Rodale, 2011.

              5 Henry EB, Carswell A, Wirz A, Fyffe V, McColl KE. Proton pump inhibitors reduce the bioavailability of dietary vitamin C. Aliment Pharmacol Ther. 2005;22(6):539-545. doi:10.1111/j.1365-2036.2005.02568.

              6 Urbas R, Huntington W, Napoleon LA, Wong P and Mullin JM. Malabsorption-Related Issues Associated with Chronic Proton Pump Inhibitor Usage. Austin J Nutr Metab. 2016; 3(2): 1041.

              7 Florentin, M., & Elisaf, M. S. (2012). Proton pump inhibitor-induced hypomagnesemia: A new challenge. World journal of nephrology, 1(6), 151–154.