NOW Calcium Citrate Pure Powder
Brand: NOW · Form: POWDER [E0162]
Our assessment
The evidence shows that calcium is a crucial mineral for bone health, but supplementation requires careful consideration of dosage and timing. Our assessment: based on the data, NOW Calcium Citrate Pure Powder provides a well-absorbed form of calcium, but you must adhere to recommended intakes to avoid risks [NIH ODS].
How it works
Think of calcium as the structural scaffolding for your bones and teeth. It supports bone density through bone mineralization and is essential for neuromuscular relaxation, helping your muscles relax and nerves signal properly after contraction [NIH ODS].
Safety profile
FDA received a total of 592,059 adverse event reports across all supplements. For calcium specifically, high intakes are linked to risks including constipation, nausea, and abnormal heart rhythms. Very high levels in the blood can cause poor muscle tone, poor kidney function, extreme tiredness, and a high risk of death from heart disease [FDA data] [NIH ODS].
Our recommendation
Start with a low dose and take it with food to enhance absorption. Be aware that calcium supplements can reduce absorption of medications such as bisphosphonates, tetracycline antibiotics, and levothyroxine — take these at least two hours apart [NIH ODS]. Your personal needs depend on your diet and health status, so consult your doctor before starting.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 8.0 oz. 227.0 Gram(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