GNC Magnesium 250 mg
Brand: GNC · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that GNC Magnesium 250 mg is a mineral supplement intended to support your body’s daily needs. However, based on the data provided, the product label lists Magnesium, but the NIH ODS data and FDA adverse events are primarily for Calcium. We can only assess the ingredient for which we have specific data, which is Calcium, not Magnesium. Data not available for the specific effects of Magnesium in this product.
How it works
Think of calcium as a structural and signaling mineral. It supports bone mineralization and density, and it also plays a role in neuromuscular relaxation, helping your muscles relax and your nerves send signals properly [NIH ODS].
Safety profile
FDA received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High blood and urine levels of calcium can cause 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
Because the data provided is for Calcium and not Magnesium, we cannot make a specific recommendation for GNC Magnesium 250 mg. If you are considering a calcium supplement, be aware of the potential side effects and medication interactions listed above. Always consult your healthcare provider before starting a new supplement, especially if you have kidney issues or take prescription medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 90.0 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