GNC Pro Performance Amino Burst 3000

Our assessment

The evidence shows that GNC Pro Performance Amino Burst 3000 contains calcium, a mineral essential for bone health and nerve function. However, the data on calcium is mixed regarding safety at high intakes. Our assessment is that this product may provide a benefit for muscle recovery and bone support, but you need to be careful about your total daily calcium intake from all sources, as excessive amounts carry real risks [NIH ODS].

How it works

Calcium in this product supports bone mineralization, helping maintain your bone density and strength. It also plays a key role in neuromuscular relaxation, which means it helps your muscles relax and your nerves signal properly after a workout [NIH ODS]. This is why some people use amino acid and mineral blends to support post-exercise recovery.

Safety profile

There are 592,059 total adverse event reports in the FDA database for products in this category, though this number covers all supplements and does not isolate this specific product [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. 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 bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

We recommend you check your total daily calcium intake from food and other supplements before adding this product. If you take medications like thyroid hormone or certain antibiotics, take this supplement at least two hours apart from those drugs. Data not available on the exact calcium amount per serving in this specific product, so consult the label carefully. Start with the lowest effective dose and monitor for any digestive discomfort [NIH ODS] [FDA data].

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