GNC Zinc 50 mg
Brand: GNC · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that calcium is essential for bone health, but high-dose supplements like this one require careful consideration. The NIH ODS confirms that calcium supports bone density and mineralization, as well as muscle relaxation and nerve signaling [NIH ODS]. However, we must be straightforward with you: the data specifically flags risks with high calcium intakes, including potential links to heart disease and prostate cancer [NIH ODS].
How it works
Think of calcium as a structural builder for your skeleton and a signal messenger for your nerves and muscles. It works through bone mineralization to keep your skeleton strong, and it helps your muscles relax properly after contracting [NIH ODS]. Without adequate calcium, your body will leach it from your bones, which can weaken them over time.
Safety profile
FDA has received a total of 592059 adverse event reports across all products, but specific report counts for this exact product are not available in the provided data. The NIH ODS warns that high calcium intakes can cause constipation, nausea, weight loss, extreme tiredness, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
We recommend you do not take this supplement without first consulting your doctor. The data indicates that high calcium intakes carry significant risks, and the specific dosage for this product is not listed in the provided data [NIH ODS]. If you are taking any prescription medications, especially those listed above, discuss potential interactions with your healthcare provider. For most adults, getting calcium from food sources is safer and more effective [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 250.0 Vegetarian Tablet(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