GNC Magnesium 500
Brand: GNC · Form: CAPSULE [E0159]
Our assessment
The evidence shows that GNC Magnesium 500 is a straightforward mineral supplement. Our assessment is that magnesium is an essential nutrient, but the specific benefits you experience will depend on your current dietary intake and health status. The data provided does not include specific clinical trials for this exact product, so we must rely on general mineral science.
How it works
Think of magnesium as a cellular workhorse. It supports bone mineralization and neuromuscular relaxation, meaning it helps your muscles relax and your nerves signal properly [NIH ODS]. This mechanism is critical for energy production, muscle function, and maintaining a steady heartbeat.
Safety profile
The FDA has received a total of 592,059 adverse event reports across all supplements, though data specific to magnesium alone is not available. The NIH ODS notes that very high levels of certain minerals can cause poor muscle tone, constipation, nausea, and abnormal heart rhythms [NIH ODS]. Additionally, minerals like calcium can reduce the absorption of medications such as tetracycline and levothyroxine [NIH ODS]. Data not available for magnesium-specific drug interactions with this product.
Our recommendation
Start by assessing your current magnesium intake from food sources. If you have a known deficiency or a condition that depletes magnesium, this supplement may be appropriate. However, because data on this specific product's side effects and studies is not available, we recommend consulting your healthcare provider before starting, especially if you take prescription medications. Choose a reputable brand and follow the label directions [FDA data].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 120.0 Capsule(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