NOW Liquid Iron
Brand: NOW · Form: LIQUID, SUPPLEMENT FORM [E0165] On Market
Our assessment
The evidence shows that calcium is a critical mineral for bone health, but it requires careful dosing and attention to potential risks. For most adults, getting calcium from food is preferred over supplements. The data confirms that calcium supports bone mineralization and neuromuscular relaxation [NIH ODS].
How it works
Think of calcium as the building block for your bones — it helps deposit minerals into your skeleton to maintain density. It also acts as a messenger for your nerves and muscles, supporting proper signaling and relaxation [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports. High calcium intakes might increase the risk of heart disease and prostate cancer. High levels in 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 [FDA data] [NIH ODS]. Calcium can reduce absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Start by assessing your dietary calcium intake before adding a supplement. Do not exceed the tolerable upper intake level without medical supervision. Take calcium with food and separate from medications like thyroid hormone or antibiotics by at least 2 hours [NIH ODS]. Data not available on specific dosing for this product.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| 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