Longs Wellness Calcium Magnesium & Zinc

Our assessment

The evidence shows that this supplement provides three essential minerals, but the most important data relates to calcium. For bone health, calcium supports bone density and mineral deposition [NIH ODS]. However, you should be aware that some research suggests high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a structural building block for your bones and a nerve relaxant for your muscles. It supports bone mineralization and neuromuscular relaxation, helping your muscles relax and nerves signal properly [NIH ODS]. The other minerals in this formula work alongside calcium for basic bodily functions.

Safety profile

FDA received 592,059 total adverse event reports across all products in this category [FDA data]. For calcium specifically, high levels in the blood and urine can cause 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]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data for magnesium and zinc side effects are not available from the provided data.

Our recommendation

Start by evaluating your total daily calcium intake from all sources — food and supplements. If you take this supplement, take it separately from medications like thyroid hormone or antibiotics by at least 2 hours [NIH ODS]. For most adults, the goal is to meet — not exceed — your daily needs. Data not available for specific dosage recommendations from this product's label.

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