Source Naturals Coral Calcium Multi-Mineral Complex

Our assessment

The evidence shows that calcium is essential for bone health, but the specific formulation of Source Naturals Coral Calcium Multi-Mineral Complex does not have unique advantages over standard calcium supplements. For you, the key is to ensure you meet your calcium needs without exceeding safe limits, as the data shows high intakes carry risks [NIH ODS].

How it works

Think of calcium as the building block for your skeleton. Its primary role is bone mineralization, where it supports bone density and mineral deposition. Calcium also plays a critical part in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS].

Safety profile

FDA has received 592,059 total adverse event reports for all supplements, though specific data for this product is not available. The data on calcium itself shows that high intakes might increase the risk of heart disease and prostate cancer. High levels of calcium 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].

Our recommendation

Before starting this supplement, check your total calcium intake from food and other supplements. Be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. If you take any of these, separate your calcium dose by at least two hours. For most adults, the goal is to get calcium from food first, and use supplements only to fill a verified gap. Data not available on the specific benefits of coral calcium over other forms.

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