PureFormulas Amino-Mag 200 mg

Our assessment

The evidence shows that this product provides 200 mg of elemental calcium per serving. We want to be clear: this is a calcium supplement, not a magnesium supplement as the brand name might suggest. For most adults, the RDA for calcium ranges from 1,000 mg to 1,200 mg daily, so this product would serve as a partial contribution to your total daily intake [NIH ODS].

How it works

Think of calcium as a building block and a signal messenger. It supports bone mineralization by helping deposit minerals into your skeleton, and it also plays a role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS].

Safety profile

Safety data is limited for this specific product, but FDA has received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. Signs of excessive calcium include poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS] [FDA data].

Our recommendation

We recommend you consider this product only if you need a modest calcium boost and are not already getting enough from food or other supplements. Be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available on specific magnesium content or amino acid chelate form — we cannot confirm the product's name matches its ingredient list. Start low and consult your healthcare provider before adding this to your routine.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide