Sundown Naturals Magnesium 500 mg
Brand: Sundown Naturals · Form: SUPPLEMENT FORM, OTHER [E0172] On Market
Our assessment
The evidence shows that Sundown Naturals Magnesium 500 mg is a supplement intended to support bone health and muscle function. However, based on the data provided, the active ingredient listed is Calcium, not Magnesium. Our assessment is that this product appears to be a calcium supplement. The data confirms that calcium is critical for bone mineralization and neuromuscular relaxation [NIH ODS].
How it works
Think of calcium as a key structural component for your bones and a signal regulator for your muscles and nerves. It supports bone density by aiding in mineral deposition and helps your muscles relax and your nerves send signals properly [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports for products in this category. For calcium specifically, safety data indicates that high intakes might increase the risk of heart disease and prostate cancer. Very high levels in the blood can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS] [FDA data]. Calcium can also reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
We recommend you check the product label carefully, as the ingredient listed in the data is Calcium, not Magnesium. If you are seeking a magnesium supplement, this may not be the correct product. For calcium, start with food sources first and do not exceed the upper limit without a healthcare provider's guidance. Always separate calcium supplements from the medications listed above by at least two hours [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 100.0 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