Nutricost Magnesium Oxide
Brand: Nutricost · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that Nutricost Magnesium Oxide is a straightforward supplement for increasing your magnesium intake, but it is not the most absorbable form of the mineral. While magnesium is essential for hundreds of bodily processes, magnesium oxide is known for having lower bioavailability compared to other forms like magnesium citrate or glycinate. Data not available on specific benefits or efficacy for this product.
How it works
Magnesium is a critical mineral involved in over 300 enzyme systems. It supports muscle and nerve function, protein synthesis, blood glucose control, and blood pressure regulation [NIH ODS]. However, magnesium oxide works primarily as a source of elemental magnesium, and it must be converted by stomach acid into a usable form. This conversion process is less efficient than with other magnesium compounds, meaning less magnesium may be available for your body to use [NIH ODS].
Safety profile
Safety data is based on the general ingredient, not this specific product. High levels of magnesium from supplements can cause diarrhea, nausea, and abdominal cramping. FDA has received 592,059 total adverse event reports across all supplement categories, though specific report counts for magnesium oxide are not available. Do not exceed the tolerable upper intake level of 350 mg of supplemental magnesium per day to avoid adverse effects [FDA data] [NIH ODS].
Our recommendation
Our assessment: Consider magnesium oxide only if you are looking for a low-cost option and do not mind a lower absorption rate. For better bioavailability and fewer digestive side effects, choose a magnesium form like magnesium glycinate or citrate. Always check with your healthcare provider before starting any new supplement, especially if you have kidney issues or take medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Nutricost |
|---|---|
| Serving Size | |
| Contents | 240.0 Capsule(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