Sundown Naturals Magnesium 500 mg
Brand: Sundown Naturals · Form: SUPPLEMENT FORM, UNKNOWN [E0177]
Our assessment
The evidence shows that calcium is a critical mineral for your body, but the specific product you asked about—Sundown Naturals Magnesium 500 mg—does not contain calcium based on the data provided. Data not available for this specific product's ingredients. Our assessment is that calcium supplements should be approached with caution due to significant safety concerns, and you should not take them without a clear medical need [NIH ODS].
How it works
Calcium acts as a master regulator for your bones and muscles. It supports bone mineralization and density, and it helps with neuromuscular relaxation, which is essential for proper muscle relaxation and nerve signaling [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports across all supplements. For calcium specifically, high intakes may 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] [FDA data]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Our recommendation is to avoid supplementing with calcium unless a healthcare provider has confirmed you have a deficiency. Focus on getting calcium from food sources first. If you do take a supplement, be aware of the serious risks and potential medication interactions listed above [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 180.0 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