21st Century Iron 65 mg
Brand: 21st Century · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that this product provides a significant dose of calcium, not iron as the product name suggests. Our assessment: you should be aware that the data details calcium, not iron. The data confirms that calcium is essential for bone mineralization and neuromuscular relaxation [NIH ODS]. However, the safety profile requires careful attention, especially at high intakes [NIH ODS].
How it works
Think of calcium as a structural building block for your bones and a key signaling molecule for your nerves and muscles. It supports bone density and mineral deposition, and it helps your muscles relax and your nerves send signals properly [NIH ODS].
Safety profile
FDA received a total of 592,059 adverse event reports across all supplements, though specific counts for this product are not available. The data shows that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. 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]. Data not available on report counts for specific side effects from this product.
Our recommendation
Given the data, our recommendation is to confirm the actual ingredient in your bottle, as the product label says "Iron" but the data only provides information on calcium. If you are taking calcium, be aware that high intakes carry significant risks [NIH ODS]. Start with a lower dose and consider getting your calcium levels checked. Always separate calcium supplements from the medications listed above by at least two hours [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 120.0 Tablet(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