Natural Factors Magnesium Citrate 150 mg
Brand: Natural Factors · Form: CAPSULE [E0159]
Our assessment
The evidence shows that this product contains calcium, not magnesium, based on the ingredient data provided. For calcium, the data confirms it plays a key role in bone mineralization and neuromuscular relaxation [NIH ODS]. However, you should be aware that the label and ingredient information are inconsistent, which is a significant concern for supplement accuracy.
How it works
Think of calcium as a structural building block for your bones and a signal regulator for your nerves and muscles. It supports bone density through mineral deposition and helps your muscles relax after contracting by supporting nerve signaling [NIH ODS].
Safety profile
FDA received 592,059 adverse event reports across all supplements, though specific data for this product is not available. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High levels 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
We recommend you verify the actual ingredient in this product before use, as the label says "Magnesium Citrate" but the data only provides information on calcium. If you are seeking a calcium supplement, start by checking with your healthcare provider about your specific needs and potential interactions with any medications you take [NIH ODS]. Data on this specific product's magnesium content is not available.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Natural Factors |
|---|---|
| Serving Size | |
| Contents | 90.0 Capsule(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