GNC Pro Performance RapidDrive Amino Series Glutamine 5000 Unflavored
Brand: GNC Pro Performance · Form: POWDER [E0162]
Our assessment
The evidence shows that this product contains calcium, not glutamine. Our assessment: you should be aware that the active ingredient here is calcium, a mineral primarily known for bone health. The data does not list glutamine as a component of this product, so any claims regarding glutamine’s effects are unsupported by the provided information [NIH ODS].
How it works
Think of calcium as a structural builder for your bones and a signal regulator for your muscles. It supports bone mineralization, which is the process of depositing minerals into your skeleton for density and strength. It also plays a key role in neuromuscular relaxation, helping your muscles relax and your nerves transmit signals properly [NIH ODS].
Safety profile
Data not available for this specific product’s side effects. However, for calcium supplements broadly: some research suggests 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]. The FDA has received a total of 592,059 adverse event reports across all dietary supplements, but specific report counts for calcium are not provided in this data [FDA data].
Our recommendation
Our recommendation: if you are seeking a glutamine supplement, this product does not appear to contain it based on the data provided. If you are looking to supplement calcium, be cautious with dosage. Calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Speak with your doctor before starting, especially if you take any of these medications.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | GNC Pro Performance |
|---|---|
| Serving Size | |
| Contents | 10.56 oz. 300.0 Gram(s) |
| Market Status | Off 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