21st Century Coral Calcium 1000 mg
Brand: 21st Century · Form: CAPSULE [E0159]
Our assessment
The evidence shows that calcium is essential for bone health and nerve function, but the dose in this product requires careful consideration. For most adults, the RDA for calcium is 1,000 mg per day from all sources, meaning this single supplement could meet your entire daily need [NIH ODS]. You should evaluate your total dietary calcium intake before starting this supplement.
How it works
Think of calcium as a foundation builder for your body. It supports bone mineralization and density, and it helps your muscles relax and nerves signal properly [NIH ODS]. When you take coral calcium at 1,000 mg, you are providing a substantial portion of your daily mineral requirement for these critical functions.
Safety profile
FDA received 592,059 total adverse event reports across all supplements. For calcium specifically, very high intakes can cause constipation, nausea, and poor muscle tone [NIH ODS]. Some research suggests high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High blood calcium levels can lead to abnormal heart rhythms, poor kidney function, and extreme tiredness [NIH ODS].
Our recommendation
Start by calculating your daily calcium from food. If you consume dairy, leafy greens, or fortified foods, you may need only 500 mg or less from supplements. Take this product with food and separate it from medications like thyroid hormone or antibiotics by at least 2 hours [NIH ODS]. Data on the specific benefits of "coral" calcium over standard calcium sources are not available.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 120.0 Capsule(s) |
| Market Status | Off 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