Finest Nutrition Calcium, Magnesium & Zinc

Our assessment

The evidence shows that this combination supplement provides calcium, magnesium, and zinc, which are essential minerals. Calcium is the primary ingredient with the most established role in bone health. However, you need to be aware of the risks associated with calcium supplementation, as high intakes may carry significant health concerns.

How it works

Think of calcium as a key structural component for your bones. It supports bone density and mineral deposition, and it also plays a vital role in neuromuscular relaxation and nerve signaling [NIH ODS]. Magnesium and zinc support many other functions in the body, but specific data for this exact combination product is not provided beyond the calcium mechanism.

Safety profile

FDA received a total of 592,059 adverse event reports for this product. For the calcium component 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]. Some research also suggests that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Before starting this supplement, we strongly recommend you assess your dietary intake of calcium from food and other supplements. Because high calcium intakes are linked to serious health risks including heart disease, do not exceed the recommended dosage on the label without consulting your doctor [NIH ODS]. If you take any prescription medications, especially antibiotics or thyroid medication, talk to your pharmacist or physician about timing your doses to avoid absorption problems [NIH ODS].

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