NOW Calcium & Magnesium Softgels
Brand: NOW · Form: SOFTGEL CAPSULE [E0161] On Market
Our assessment
The evidence shows that NOW Calcium & Magnesium Softgels provides two essential minerals, but you need to be aware of significant safety considerations. Calcium supports bone density and muscle function [NIH ODS]. However, high calcium intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. You should carefully evaluate your total daily calcium intake from all sources.
How it works
Think of calcium as a structural building block for your bones and a signal regulator for your muscles and nerves. It supports bone mineralization and neuromuscular relaxation [NIH ODS]. This means it helps your bones stay dense and helps your muscles relax properly after contracting [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports across all products. Specific side effects from high calcium levels include poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available for magnesium-specific adverse event counts.
Our recommendation
Start by reviewing your total daily calcium intake from food and other supplements. Do not exceed recommended levels without medical supervision. Take this supplement at a separate time from any medications listed in the interactions section [NIH ODS]. Consult your healthcare provider before use, especially if you have kidney disease or heart concerns [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 120.0 Softgel(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