GNC Pro Performance Ultra Amino Complex Fruit Punch

Our assessment

The evidence shows that the primary active ingredient in this product is calcium. Based on the data provided, calcium is a mineral essential for bone health and muscle function, but its benefits and risks depend heavily on your total intake from food and supplements. You should consider this product’s contribution to your daily calcium totals carefully.

How it works

Think of calcium as a structural builder for your bones and a signal messenger for your nerves and muscles. It supports bone density and mineral deposition, while also helping your muscles relax and your nerves send signals properly [NIH ODS]. This means it plays a role in both skeletal strength and everyday physical function.

Safety profile

Data not available for this specific product. However, regarding calcium generally, some research suggests that high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. 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]. The FDA has received a total of 592,059 adverse event reports for all supplement products, though specific reports for this product are not available [FDA data].

Our recommendation

Only use this product if you are certain your diet does not meet your daily calcium needs. Be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. If you take any of these medications, separate your calcium intake by at least 2 hours. Do not exceed the recommended dose on the label without consulting a healthcare professional.

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