The nutrient deficiencies caused by common medications
Drug-Induced Nutrient Depletion (DIND): The Hidden Cost of Chronic Medication
In practice, we often see patients who maintain exemplary diets yet present with significant micronutrient deficiencies. While lifestyle and genetics play a role, the answer is often found in their medicine cabinet. Many of the most commonly prescribed medications in the UK, from acid reflux treatments to statins, interfere with the complex biochemistry of nutrient absorption, utilisation, and excretion.
This phenomenon, known as Drug-Induced Nutrient Depletion (DIND), occurs through several mechanisms:
altered intestinal pH
competitive inhibition of proteins that transport molecules
accelerated kidney (renal) clearance.
Understanding these interactions is essential for long-term physiological homeostasis.
The main culprits
Based on clinical data and industry-standard pharmacological benchmarks, these are the ten most significant drug-nutrient interactions:
Proton pump inhibitor (PPIs) eg. omeprazole, lansoprazole → B12, magnesium, iron, calcium. Long-term use can cause fatigue, bone density loss, and hypomagnesemia. PPIs reduce stomach acid in order to treat reflux. However, stomach acid is essential for the liberation of Vitamin B12 from dietary protein and for the solubility of minerals like iron and calcium. Long-term use is associated with a 65% increase in the risk of B12 deficiency.
Statins eg. atorvastatin, simvastatin → Statins inhibit the enzyme HMG-CoA reductase to lower cholesterol. Unfortunately, this same pathway is responsible for the production of Coenzyme Q10, an essential component for mitochondrial energy production. Statins can reduce serum CoQ10 levels by as much as 40%, which is often linked to muscle fatigue, myalgia and mitochondrial fatigue.
Biguanides eg. metformin → deficiency in vitamin B12, folate. This can contribute to peripheral neuropathy (nerve pain) and certain types of anemia. Metformin is a first-line anti-diabetic medication, yet research indicates up to 30% of long-term users experience reduced vitamin B12 absorption. The drug interferes with calcium-dependent membrane action in the ileum (the end of the small intestine), where B12 is primarily absorbed. This is clinically vital because B12 deficiency can cause peripheral neuropathy - a symptom often mistakenly attributed to the diabetes itself.
Synthetic oestrogens eg. combined oral contraceptives, HRT → deficiencies in B6 (pyridoxine), B9 (folate), B12 (cyanocobalamin), zinc, magnesium. These can dysregulate mood fluctuations and lead to elevated homocysteine levels. This is one explanation of the increased risk of blood clots on these medications although the clinical significance is usually fairly low. Oral contraceptives increase the metabolic turnover of Vitamin B6, which is a cofactor in the synthesis of serotonin and dopamine. This biochemical drain may contribute to mood disturbances. Furthermore, systemic levels of zinc and magnesium are frequently suppressed in women taking synthetic estrogens.
Corticosteroids eg. prednisolone, hydrocortisone → deficiencies in calcium, vitamin D, potassium, zinc. Long-term corticosteroids increase osteoporosis risk and can lead to impaired wound healing.
Loop Diuretics eg. furosemide, bumetanide → electrolytes (sodium, potassium, magnesium, zinc). Increased urination will lead to more of these electrolytes being eliminated from the body. Significant reductions in these can cause arrhythmias and muscle cramps.
Antibiotics eg. amoxicillin, doxycycline. Can lead to reduction in vitamin K2, B vitamins. Vitamin K2 is produced in the large intestine through your own gut flora. Antibiotics are non-selective towards bacteria so they will harm these beneficial bacteria as well as the bacteria causing the infection you are affected by. When these beneficial bacteria are harmed it can lead to gut dysbiosis, bloating, change to stool cycle and can even affect some blood-thinning medication such as warfarin.
Methotrexate → folate (Vitamin B9). Methotrexate inhibits an enzyme called dihydrofolate reductase. This enzyme is essential for the production of folate, which is then a crucial factor in making DNA. DNA is essential for the cell replication and growth and usually the fastest growing cells are most affected. This is why side-effects of methotrexate commonly include mouth ulcers, hair loss, liver stress and gastrointestinal discomfort.
Anticonvulsants eg. phenytoin, sodium valproate (Epilim) → vitamin D, calcium, folate, biotin, zinc. Reduced absorption of vitamin D and calcium can lead to bone disorders, such as osteomalacia, especially in children. In medications where the absorption of biotin is reduced then hair loss and skin sensitivities can be experienced.
Stimulant laxatives eg. Senna, Bisacodyl → overuse of these medications can lead to electrolytes such as potassium, sodium and magnesium to be excessively flushed out. As these laxatives work by stimulating the large intestine, it reduces the time that water and nutrients are able to be absorbed. Because it they do not tend to work on the small intestine then the absorption of calories from macronutrients (fats, protein , carbohydrates) are unaffected.
A Critical Note on Professional Guidance
It is imperative to understand that you should never discontinue prescribed medication based on concerns about nutrient depletion. These medications are vital for managing chronic conditions. Instead, the goal is "informed co-management."
If you are on long-term medication, you do not need to guess if you are deficient; you can know. Monitoring your biomarkers allows for targeted, high-bioavailability supplementation that offsets the negative effects your medication may be having on your system without interfering with the drug's efficacy.
The Orion Medica Strategy: Precision Monitoring
At Orion Medica, we specialise in the cross-over of pharmacology and nutrition. Our blood panels are specifically designed to look for the biomarkers of drug-induced depletion.
Don't let your life-saving medication compromise your nutritional health.
The only way to truly treat a deficiency is to identify it first.
Book your targeted blood test, using this link, today to ensure your nutrient levels are optimised alongside your treatment plan.
