NOW Calcium Citrate
Brand: NOW · Form: TABLET [E0155]
Our assessment
The evidence shows that calcium is a critical mineral for your bone health and muscle function. Our assessment is that NOW Calcium Citrate can be an effective way to meet your daily calcium needs, especially if you have trouble absorbing other forms of calcium. However, you should be aware of the potential risks and interactions before starting supplementation [NIH ODS].
How it works
Think of calcium as a structural building block for your skeleton. It supports bone density and mineral deposition, which is essential for keeping your bones strong as you age. Calcium also plays a key role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly after contraction [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports for this product category. High calcium intakes may increase the risk of heart disease and prostate cancer. Side effects from high blood or urine calcium levels include poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, and abnormal heart rhythms [FDA data] [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
If you decide to use NOW Calcium Citrate, start with a moderate dose and take it with food for best absorption. Be sure to separate your dose from any medications you take by at least two hours. Data not available for a specific dosage recommendation from the provided data. Always consult your healthcare provider before starting a new supplement, especially if you have kidney issues or take prescription medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 250.0 Tablet(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