NOW Double Strength Iron 36 mg
Brand: NOW · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that this product is a calcium supplement, not an iron supplement as the name might suggest. Our assessment: Calcium is essential for bone health, but you need to be careful with dosing. The data indicates that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. We recommend you verify the specific strength of this product on the label, as the data provided does not list a specific dose for this item.
How it works
Think of calcium as a building block for your skeleton. It supports bone density and mineral deposition, and it also helps your muscles relax and your nerves signal properly [NIH ODS]. This dual role makes it critical for both your structural and nervous system health.
Safety profile
FDA received 592,059 total adverse event reports across all supplements, though specific counts for this product are not available. Potential side effects from high calcium levels include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, and abnormal heart rhythms [NIH ODS]. You should also be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available for specific report counts for this product.
Our recommendation
Start by checking your current calcium intake from food and other supplements. Do not exceed the tolerable upper intake level without medical supervision. Take this supplement with food and separate it from the medications listed above by at least two hours [NIH ODS]. Always read the label for the exact strength and serving size, as that information was not provided in our data set.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 90.0 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