Rexall Calcium, Magnesium and Zinc
Brand: Rexall · Form: SUPPLEMENT FORM, OTHER [E0172] On Market
Our assessment
The evidence shows that a supplement like Rexall Calcium, Magnesium and Zinc can be a convenient way to support bone health, but you need to be cautious about dosage and timing. The primary ingredient, calcium, is well-studied for bone mineralization, but high intakes carry significant risks [NIH ODS].
How it works
Think of calcium as a building block for your skeleton. It supports bone density and mineral deposition, which is critical for preventing fractures as you age. It also plays a role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports for this product category. For calcium specifically, some research suggests that high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels of calcium in the 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 [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Do not take this supplement without first reviewing your total daily calcium intake from food and other supplements. If you take any prescription medications, separate your calcium dose by at least 2 hours. Start with the lowest effective dose. Data on the specific magnesium and zinc amounts in this product are not available, so check the label carefully [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Rexall |
|---|---|
| Serving Size | |
| Contents | 60.0 Caplet(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