GNC Super Magnesium 400 mg
Brand: GNC · Form: SUPPLEMENT FORM, OTHER [E0172] On Market
Our assessment
Our assessment: GNC Super Magnesium 400 mg provides calcium, a mineral that supports bone density and nerve signaling [NIH ODS]. However, the evidence shows that high calcium intake from supplements may carry risks, including a potential link to heart disease and prostate cancer [NIH ODS]. You should weigh these risks carefully before starting this supplement.
How it works
Think of calcium as a building block for your skeleton and a signal regulator for your nerves. It supports bone mineralization and helps your muscles relax after contracting [NIH ODS]. When you take this supplement, the calcium is absorbed into your bloodstream to perform these functions.
Safety profile
FDA received 592,059 total adverse event reports across all products, though specific report counts for this supplement are not available. High levels of calcium in your blood and urine 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
Our recommendation: Before taking GNC Super Magnesium 400 mg, consult your healthcare provider to check your current calcium intake from food and other supplements. Do not exceed the recommended daily allowance without medical supervision, and be aware of the potential interactions with your medications [NIH ODS]. Data on any specific magnesium content is not available.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC |
|---|---|
| Serving Size | |
| Contents | 90.0 Caplet(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