GNC Calcium Citrate 1000 mg
Brand: GNC · Form: SUPPLEMENT FORM, OTHER [E0172] On Market
Our assessment
The evidence shows that calcium is a critical mineral for your bone health and nerve function. For a general adult, the goal is to meet your daily needs through diet and supplementation only when necessary. Data on the specific GNC Calcium Citrate 1000 mg product is limited, but the core ingredient, calcium citrate, is well-studied [NIH ODS].
How it works
Think of calcium as a building block for your skeleton and a signal messenger for your nerves and muscles. It supports bone density and mineral deposition, which is essential for keeping your bones strong as you age. It also helps your muscles relax and your nerves send signals properly [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports for this product category. While calcium is generally safe, some research suggests that high intakes might increase the risk of heart disease and prostate cancer. Very high levels in the blood can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, and abnormal heart rhythms [NIH ODS] [FDA data]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Start by assessing your total daily calcium intake from food and supplements. Do not exceed the tolerable upper intake level without medical supervision. To maximize absorption, take this supplement with food and separate it from the medications listed above by at least two hours. Consult your doctor before starting, especially if you have kidney issues or a history of heart disease [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 180.0 Vegetarian Caplet(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