GNC Calcium Citrate 1000 mg
Brand: GNC · Form: SUPPLEMENT FORM, OTHER [E0172]
Our assessment
The evidence shows that calcium is essential for bone health, but our assessment of GNC Calcium Citrate 1000 mg requires careful attention to dosing and timing. While calcium supports bone mineralization and neuromuscular relaxation [NIH ODS], you must be aware that high intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. Data for this specific product's exact bioavailability is not available.
How it works
Think of calcium as a key structural component for your skeleton. It supports bone density and mineral deposition, and it also helps your muscles relax and your nerves signal properly [NIH ODS]. Taking calcium citrate, which is often more absorbable than other forms, can help you meet your daily needs.
Safety profile
FDA received 592,059 total adverse event reports across all supplements. Specific side effects from high calcium levels include 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].
Our recommendation
Start with a single tablet daily and take it with food to enhance absorption. Do not exceed the total recommended dietary allowance from all sources (food plus supplements) without your doctor's guidance. If you take thyroid medication or antibiotics, separate your calcium dose by at least 2 hours [NIH ODS]. Monitor for constipation or nausea, and report any unusual symptoms to your healthcare provider.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 180.0 Vegetarian Caplet(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