21st Century Coral Calcium 1000 mg
Brand: 21st Century · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that calcium is a critical mineral for bone health, but the specific product "21st Century Coral Calcium 1000 mg" has a limited safety record. Data not available on the exact source or purity of this specific brand. Our assessment: You should be cautious with this supplement, as high calcium intakes carry real risks [NIH ODS].
How it works
Think of calcium as a structural building block for your bones. It supports bone density and mineral deposition, which is essential for keeping your skeleton strong. It also plays a key role 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 across all supplements, but specific data for this product is not available. The risks of taking too much calcium are significant. High levels in your 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
Do not take this supplement without first consulting your doctor. You should have your calcium levels checked and assess your dietary intake before adding a 1000 mg supplement. If you do take calcium, be aware of the serious side effects and medication interactions [NIH ODS]. For most adults, getting calcium from food is safer than from supplements.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 120.0 Capsule(s) |
| Market Status | On Market |
How to Read This 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