GNC Pro Performance Amino 1000
Brand: GNC Pro Performance · Form: SOFTGEL CAPSULE [E0161] On Market
Our assessment
The evidence shows that GNC Pro Performance Amino 1000 is a calcium supplement, not an amino acid product as the name might suggest. Calcium is a critical mineral for bone health and muscle function. However, the data does not support using this product for athletic performance or muscle building beyond what calcium provides for neuromuscular signaling [NIH ODS].
How it works
Think of calcium as a structural builder and signal messenger. It supports bone mineralization by depositing minerals into your skeleton, and it helps your muscles relax and your nerves send signals properly after contraction [NIH ODS]. This is essential for everyday movement and exercise recovery, but the product does not contain actual amino acids for muscle protein synthesis.
Safety profile
FDA received 592,059 adverse event reports across all supplement categories, though specific reports for this product are not available. For calcium specifically, high intakes can lead to constipation, nausea, and abnormal heart rhythms. Extremely high levels in the blood may cause poor kidney function and extreme tiredness [NIH ODS] [FDA data]. Calcium can also interfere with medications like thyroid hormone and certain antibiotics [NIH ODS].
Our recommendation
If you are looking for calcium to support bone density, this product may be an option. However, if you want amino acids for muscle recovery, you need a different product entirely. Start with your total daily calcium intake from food and supplements — most adults need 1,000 to 1,200 mg per day total. Always take calcium with food and separate from thyroid medication or antibiotics by at least 2 hours [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC Pro Performance |
|---|---|
| Serving Size | |
| Contents | 240.0 Softgel(s) |
| Market Status | On 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