Major Magnesium 500 mg
Brand: Major · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that this product, Major Magnesium 500 mg, contains calcium as an ingredient. Our assessment is that you should be very cautious with this supplement. The data indicates that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. We cannot recommend this product for general use without more specific ingredient information.
How it works
Calcium supports bone mineralization and density, and it helps with neuromuscular relaxation and nerve signaling [NIH ODS]. Think of calcium as a key building block for your skeleton and a regulator for your muscles and nerves. However, because the label only lists "See label" for the brand and ingredients, we cannot confirm the exact form or amount of calcium you would be getting from each dose.
Safety profile
FDA received a total of 592,059 adverse event reports for this product. Side effects from high calcium levels in the blood and urine can 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]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available on specific report counts for each side effect.
Our recommendation
Our recommendation is to not take this supplement until you have more information. Check the product label for the exact amount of calcium per serving and the specific ingredient list. If you need a magnesium supplement, look for a product that clearly states "Magnesium" as the primary ingredient with a specific form (like magnesium glycinate or citrate) and a clear brand name. Always consult your doctor or pharmacist before starting any new supplement, especially if you take prescription medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Major |
|---|---|
| Serving Size | |
| Contents | 100.0 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