GNC Super Magnesium 400 mg
Brand: GNC · Form: SUPPLEMENT FORM, OTHER [E0172]
Our assessment
The evidence shows that GNC Super Magnesium 400 mg is a product containing calcium, which supports bone mineralization and neuromuscular relaxation [NIH ODS]. However, the data provided does not contain specific information about the magnesium content or other ingredients in this product. Data not available for magnesium specifics.
How it works
Think of calcium as a key structural component — it helps your body build and maintain strong bones through bone mineralization and supports proper muscle and nerve function through neuromuscular relaxation [NIH ODS]. This mineral plays a fundamental role in keeping your skeletal system resilient and your nerves signaling correctly.
Safety profile
FDA received 592,059 total adverse event reports for this product category. High calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Side effects from high calcium levels include 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 reduce the absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
If you choose to take this supplement, be aware of the potential risks from high calcium intake and discuss with your healthcare provider, especially if you take any medications listed above [NIH ODS]. Start with a low dose and monitor for side effects such as constipation or nausea [NIH ODS]. Data not available for a specific dosage recommendation for this product.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 90.0 Caplet(s) |
| Market Status | Off 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