The Vitamin Shoppe Magnesium Oxide 400 mg
Brand: The Vitamin Shoppe · Form: CAPSULE [E0159]
Our assessment
The evidence shows that The Vitamin Shoppe Magnesium Oxide 400 mg is a standard, widely available form of magnesium. However, magnesium oxide is known for having lower bioavailability compared to other forms like magnesium citrate or glycinate. While it can help correct a deficiency, you may need higher doses to achieve the same effect as other types. Data on the exact absorption rate for this specific product is not available.
How it works
Magnesium is a critical mineral involved in over 300 enzyme reactions in your body, including muscle and nerve function, blood glucose control, and blood pressure regulation [NIH ODS]. Magnesium oxide works by providing elemental magnesium, which your body must convert to a usable form. It is often used to support digestive regularity due to its mild laxative effect [NIH ODS].
Safety profile
Data not available for adverse event reports specific to The Vitamin Shoppe Magnesium Oxide 400 mg. General side effects from magnesium supplements can include diarrhea, nausea, and abdominal cramping, especially at higher doses [NIH ODS]. The tolerable upper intake level for supplemental magnesium is 350 mg per day, so taking 400 mg of magnesium oxide (which contains about 240 mg of elemental magnesium) is generally within safe limits for most adults [NIH ODS].
Our recommendation
If you choose this product, start with one capsule daily and monitor your digestive comfort. Because of its lower absorption, you may need to pair it with a balanced diet rich in magnesium from foods like nuts, seeds, and leafy greens. For better absorption, consider a magnesium citrate or glycinate form. Data not available for specific drug interactions with this brand, so consult your doctor if you take medications for heart conditions or kidney issues.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | The Vitamin Shoppe |
|---|---|
| Serving Size | |
| Contents | 200.0 Capsule(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