Natrol Liquid Iron
Brand: Natrol · Form: LIQUID, SUPPLEMENT FORM [E0165] On Market
Our assessment
The evidence shows that while calcium is essential for bone health, the data on supplementation is mixed with important safety considerations. For most adults, getting calcium from food is preferred over supplements, and high doses carry documented risks [NIH ODS].
How it works
Think of calcium as a structural building block for your skeleton. It supports bone density through mineralization and also plays a key role in neuromuscular relaxation, helping your muscles relax and nerves signal properly [NIH ODS].
Safety profile
FDA has received 592,059 total adverse event reports across all products. For calcium specifically, some research suggests that 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] [FDA data].
Our recommendation
Start by assessing your dietary calcium intake first. If you supplement, keep total calcium from food and supplements below the tolerable upper intake level. Take calcium separately from medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin, as it can reduce their absorption [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Natrol |
|---|---|
| Serving Size | |
| Contents | 8.0 fl. Oz. 237.0 mL |
| 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