Dr. Mercola Magnesium L-Threonate
Brand: Dr. Mercola · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that Dr. Mercola Magnesium L-Threonate is a specific form of magnesium designed to support brain health. Our assessment focuses on the ingredient calcium, as data for magnesium L-threonate is limited. The data confirms calcium is essential for bone mineralization and neuromuscular relaxation [NIH ODS]. However, for this specific product, data on its primary ingredient is not available.
How it works
Think of calcium as a master regulator for your bones and muscles. It supports bone density and mineral deposition, while also helping your muscles relax and nerves signal properly [NIH ODS]. For magnesium L-threonate specifically, the mechanism of action is not provided in the data.
Safety profile
FDA received 592,059 total adverse event reports across all supplements. For calcium, high intakes might increase the risk of heart disease and prostate cancer. High blood and urine levels 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]. For this specific product, side effect data is not available.
Our recommendation
Start by consulting your healthcare provider before taking this supplement. Be aware that calcium can reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data for the primary ingredient, magnesium L-threonate, is not available, so we cannot provide a specific dosage recommendation for this product.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Dr. Mercola |
|---|---|
| Serving Size | |
| Contents | 270.0 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