Dr. Mercola Magnesium L-Threonate
Brand: Dr. Mercola · Form: CAPSULE [E0159] On Market
Our assessment
Our assessment: The evidence shows that Dr. Mercola Magnesium L-Threonate contains calcium as a key ingredient, but the specific dose per serving is not provided on the label. Calcium is essential for bone health and nerve function, but taking it without knowing the exact amount introduces uncertainty into your regimen [NIH ODS].
How it works
Think of calcium as a structural builder and signaler — it supports bone mineralization by helping deposit minerals into your skeleton, and it promotes neuromuscular relaxation by aiding muscle relaxation and nerve signaling [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports for this product category. Side effects from high calcium intake include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS]. Calcium can also reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data on side effects specific to the magnesium L-threonate component are not available.
Our recommendation
Because the label does not list the calcium dose, we recommend you seek a product with a clearly stated amount so you can track your total intake. If you choose to use this supplement, take it at least two hours apart from any prescription medications to avoid absorption issues [NIH ODS]. Always consult your healthcare provider before starting any new supplement.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Dr. Mercola |
|---|---|
| Serving Size | |
| Contents | 120.0 Licaps(TM) 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