Nature's Lab Magnesium Glycinate 400 mg
Brand: Nature's Lab · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that while magnesium is a critical mineral, this specific product contains **400 mg of magnesium glycinate per serving**. Our assessment is that this is a reasonable dose for many adults, but you should be aware that the RDA for magnesium ranges from 310–420 mg depending on age and sex [NIH ODS]. Data on the specific form "magnesium glycinate" is limited in the provided data.
How it works
Think of magnesium as a multi-tool for your body. It supports bone mineralization and helps with neuromuscular relaxation, which is why you might take it for muscle cramps or sleep [NIH ODS]. The glycinate form is often used because it is bound to the amino acid glycine, which may promote a calming effect, though this specific claim is not supported by the data provided.
Safety profile
The FDA has received a total of 592,059 adverse event reports across all supplement categories, but specific report counts for this product are not available [FDA data]. High levels of magnesium from supplements 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]. You should be cautious if you have kidney issues.
Our recommendation
Start with a lower dose to assess tolerance. Do not exceed 420 mg of total magnesium from all sources daily unless directed by your doctor [NIH ODS]. Be aware that calcium supplements can reduce the absorption of certain medications, and similar interactions may apply to magnesium [NIH ODS]. Data not available on specific drug interactions for magnesium glycinate.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Nature's Lab |
|---|---|
| Serving Size | |
| Contents | 120.0 Easy-To-Swallow 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