GNC Zinc 30 mg
Brand: GNC · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that GNC Zinc 30 mg is a standard-dose supplement, but the FDA data provided is not specific to this product. Data for the ingredient calcium, not zinc, is available. Our assessment: calcium is essential for bone health, but you need to be careful with dosing. The data confirms that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS].
How it works
Think of calcium as a structural builder for your skeleton. It supports bone mineralization and density, and it also plays a role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS].
Safety profile
Data for this specific zinc product is not available. For calcium, FDA received 592,059 total adverse event reports across all supplements. Side effects from high calcium intake include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS]. Calcium can also reduce the absorption of medications like bisphosphonates, tetracycline and fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Start with the recommended dietary allowance for calcium, which is 1,000 mg per day for most adults. Get your calcium from food first, and only supplement if your diet is low. Take calcium supplements with food and separately from thyroid medication or antibiotics. Choose calcium citrate if you have stomach issues [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 100.0 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