NOW Magnesium Transporters
Brand: NOW · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that calcium is a critical mineral for bone health and nerve function, but you need to be careful with dosing. The data indicates that high intakes may increase risks for heart disease and prostate cancer [NIH ODS]. You should not exceed recommended levels without medical supervision.
How it works
Think of calcium as a structural builder for your skeleton. It supports bone density and mineral deposition, while also playing a key role in neuromuscular relaxation and nerve signaling [NIH ODS]. Your body relies on a steady supply to keep muscles and nerves working properly.
Safety profile
FDA received 592,059 total adverse event reports across all products in this category. Specific side effects from high calcium levels include poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS]. Calcium can also reduce absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Start by assessing your dietary calcium intake before adding supplements. Be aware of potential interactions with your prescription medications. Data not available on the specific magnesium content in this product. We recommend you consult your healthcare provider to determine if calcium supplementation is appropriate for you and to monitor for side effects [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 180.0 Veg Capsule(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