Metagenics PhytoMulti With Iron

Our assessment

The evidence shows that Metagenics PhytoMulti With Iron is a multivitamin that includes calcium as a key mineral for bone health. Our assessment is that this product can help you fill nutritional gaps, but you need to be aware of the specific risks and interactions associated with its calcium content. The total FDA adverse event reports for this product category are 592,059, though this number reflects all supplements, not just this specific formula [FDA data].

How it works

Calcium works as a master builder for your bones. It supports bone density and mineral deposition through a process called bone mineralization. Additionally, calcium plays a critical role in neuromuscular relaxation, helping your muscles relax and your nerves signal properly [NIH ODS]. Think of it as the structural support that keeps your skeleton strong while also calming your nervous system.

Safety profile

Data not available for side effect report counts specific to this product. However, high calcium intakes from supplements might increase the risk of heart disease and prostate cancer [NIH ODS]. Very 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

Our recommendation is to take this supplement with food to improve absorption. If you take any of the medications listed above, separate your dose by at least 2 hours to avoid interference [NIH ODS]. Be cautious not to add other high-dose calcium supplements without consulting your doctor, as the data on heart disease risk is a serious consideration [NIH ODS]. Finally, monitor for symptoms like constipation or nausea, and if you experience extreme tiredness or abnormal heart rhythms, stop use and contact your healthcare provider immediately.

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