NOW Magnesium Citrate
Brand: NOW · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that NOW Magnesium Citrate is a widely used supplement for supporting muscle function and nerve signaling. However, based on the data provided, the primary ingredient in this product is Calcium, not Magnesium. Our assessment is that you are likely looking for a magnesium supplement, but the data we have indicates this specific product label lists Calcium as the active ingredient. We will analyze the data for Calcium as it appears in the product information.
How it works
Calcium acts as a master regulator for your body's structural and signaling systems. It supports bone density and mineral deposition through a process called bone mineralization. Additionally, it supports neuromuscular relaxation, meaning it helps your muscles relax and your nerves send signals properly [NIH ODS].
Safety profile
Data not available for side effect reports specifically for this product. The FDA has received 592,059 total adverse event reports across all supplements in the database [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High levels of calcium in the blood and urine 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]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
If you intended to take a magnesium supplement, please verify the product label carefully, as the data shows this product contains Calcium. For calcium, start with the recommended daily intake and get your levels checked by a healthcare provider. Be aware of the potential medication interactions listed above [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 240.0 Veg 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