NOW Magnesium Citrate 200 mg
Brand: NOW · Form: TABLET [E0155]
Our assessment
The evidence shows that NOW Magnesium Citrate 200 mg is a supplement for magnesium, not calcium. Data for this specific product is limited, but the safety data for calcium—a related mineral—provides important context. We must be honest: the data provided does not include specific studies or side effect reports for this exact magnesium product, so we will focus on what the data tells us about the mineral category [NIH ODS].
How it works
Think of calcium as a structural support for your bones and a signal regulator for your nerves and muscles. The NIH ODS data explains that calcium supports bone mineralization and density, and also aids in neuromuscular relaxation and nerve signaling [NIH ODS]. Your body relies on calcium for these critical functions.
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplements. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. High blood and urine levels of calcium 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]. Data on side effects specific to this magnesium product is not available [FDA data].
Our recommendation
Our recommendation: Without specific data for NOW Magnesium Citrate 200 mg, we cannot endorse its use. If you are considering a calcium supplement, be aware that it can reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. For magnesium, data is not available to provide a safe recommendation. Always consult your doctor before starting any new supplement [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