GNC Vitamin C + Zinc
Brand: GNC · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that this product combines two well-studied nutrients. However, based on the data provided, we can only speak to the calcium component. You should be aware that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Always check the specific label for the exact doses of vitamin C and zinc in this product.
How it works
Calcium acts as a master regulator for your bones and muscles. It supports bone density through mineralization and helps your muscles relax and nerves signal properly [NIH ODS]. Data on the specific roles of vitamin C and zinc in this product is not available for this analysis.
Safety profile
FDA received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high levels in your blood and urine can cause poor muscle tone, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [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
If you take this product, be cautious not to exceed your total daily calcium needs from all sources (diet plus supplements). Separate calcium supplements from thyroid medication and certain antibiotics by at least 2 hours [NIH ODS]. Data not available for a specific dose recommendation for this product.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 60.0 Capsule(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