Isotonix Multivitamin With Iron
Brand: Isotonix · Form: POWDER [E0162]
Our assessment
The evidence shows that Isotonix Multivitamin With Iron contains calcium, a mineral essential for bone health. However, the data on calcium supplementation carries important cautions you should consider before taking this product. Our assessment is that while calcium supports bone density and muscle relaxation [NIH ODS], the potential risks highlighted in the data require careful evaluation.
How it works
Calcium works as a master regulator for your body's structural and signaling systems. It supports bone mineralization by depositing into your skeleton for density, and it aids neuromuscular relaxation by helping your muscles and nerves communicate properly [NIH ODS]. Think of it as the key mineral that keeps your bones strong and your muscle contractions smooth.
Safety profile
FDA received 592,059 total adverse event reports for products in this category. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels in your 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
Given the potential risks, our recommendation is to consult your healthcare provider before starting this supplement, especially if you take any medications listed in the interactions. Be honest about your total calcium intake from food and other supplements to avoid exceeding safe levels. Data not available on exact iron content or the full multivitamin formulation, so a targeted supplement may be a safer choice [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Isotonix |
|---|---|
| Serving Size | |
| Contents | 3.5 oz. 100.0 g |
| 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