Natural Factors Calcium & Magnesium Citrate With D
Brand: Natural Factors · Form: TABLET [E0155]
Our assessment
The evidence shows that this combination supplement provides calcium and magnesium with vitamin D, which are foundational for bone health and muscle function. For most adults, meeting your daily calcium needs through diet is preferred, but a supplement can help fill gaps when intake is insufficient [NIH ODS].
How it works
Think of calcium as the building block for your bones, supporting bone density and mineral deposition. Magnesium works alongside it to support muscle relaxation and nerve signaling, while vitamin D acts as a master regulator to help your body absorb and use calcium effectively [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high intakes can cause constipation, nausea, and abnormal heart rhythms. There is also some research suggesting that very high calcium intakes might increase the risk of heart disease and prostate cancer. Calcium can reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, and levothyroxine [FDA data] [NIH ODS].
Our recommendation
Start by assessing your dietary calcium intake first. If you need a supplement, take it with food and separate it from other medications by at least two hours. Data not available on the exact amount of vitamin D in this specific product, so check the label to ensure you are not exceeding 2,000 IU daily without medical guidance [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Natural Factors |
|---|---|
| Serving Size | |
| Contents | 90.0 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