GNC Bariatrics Gentlesorb Iron 18 mg

Our assessment

The evidence shows that GNC Bariatrics Gentlesorb Iron 18 mg provides a specific dose of iron, but data on the complete ingredient profile is not available. Our assessment focuses on the calcium content listed for this product category. Calcium is a mineral that supports bone density and neuromuscular relaxation [NIH ODS]. You should be aware that while calcium is essential, the data shows some research suggests high intakes might increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a building block for your skeleton and a regulator for your nerves and muscles. It works through bone mineralization, supporting bone density and mineral deposition, and through neuromuscular relaxation, supporting muscle relaxation and nerve signaling [NIH ODS]. For the iron component, specific mechanism data is not available.

Safety profile

FDA received a total of 592,059 adverse event reports across all supplement categories. For calcium specifically, high levels 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]. Specific side effect report counts for this product are not available.

Our recommendation

You should only take this supplement if you have a confirmed need for 18 mg of iron and are aware of calcium's potential risks. Data not available for complete ingredient interactions. Before starting, check with your healthcare provider, especially if you take medications like thyroid hormone or antibiotics, as calcium can interfere with their absorption [NIH ODS]. Do not exceed the recommended dose on the 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