NOW Magnesium Citrate 200 mg
Brand: NOW · Form: TABLET [E0155]
Our assessment
The evidence shows that while this product is labeled as a magnesium supplement, the available data from the National Institutes of Health Office of Dietary Supplements (ODS) actually covers calcium, not magnesium. Because the provided data does not include any specific information on magnesium citrate, we cannot make a direct assessment of this product’s mechanism or efficacy. For calcium, the data shows it is critical for bone mineralization and neuromuscular relaxation [NIH ODS].
How it works
Based on the data provided, calcium supports bone density by aiding in mineral deposition and helps your muscles relax by supporting nerve signaling [NIH ODS]. Think of it as a key player for your skeletal structure and nerve function. However, no mechanism data is available for magnesium citrate specifically.
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]. For calcium, the data notes that high intakes might increase the risk of heart disease and prostate cancer. High blood levels of calcium 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]. Data not available for magnesium citrate side effects.
Our recommendation
Because the provided data does not contain specific information on magnesium citrate, we cannot offer a confident recommendation for this product. If you are seeking a magnesium supplement, consult your healthcare provider. For general calcium health, the data indicates that calcium can reduce absorption of medications like bisphosphonates, tetracycline antibiotics, and levothyroxine, so take calcium supplements at a different time than these medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 250.0 Tablet(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