🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 18% of ingredients have research evidence
B Label Compliance Grade

Product Label

📸

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Label Data

14.07 Gram(s) Serving Size
48 Servings
Amino acid/Protein Product Type
18% Evidence Coverage

Supplement Facts — Evidence Check

Calories
10 Calorie(s)
Total Carbohydrates
3 Gram(s) (1% DV)
Sodium
200 mg (9% DV)
3.6 Gram(s)
📊 Market median: 17.4mg (161 products)
Median 17.4mg This product: 3.6mg
2 Gram(s)
📊 Market median: 500.0mg (180 products) 📚 5 studies (Tier A: 0, B: 1)
This product: 2mg
1.2 Gram(s)
📊 Market median: 17.4mg (161 products)
Median 17.4mg This product: 1.2mg
L-Valine
1.2 Gram(s)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 1mg
Glycine
500 mg
100 mg
📊 Market median: 420.0mg (227 products)
Median 420.0mg This product: 100mg
L-Threonine
100 mg
100 mg
📊 Market median: 500.0mg (143 products)
This product: 100mg
100 mg
📊 Market median: 500.0mg (223 products) 📚 22 studies (Tier A: 0, B: 1)
This product: 100mg
L-Phenylalanine
25 mg
25 mg
📊 Market median: 2000.0mg (275 products)
Median 2000.0mg This product: 25mg
25 mg
📊 Market median: 500.0mg (193 products) 📚 7 studies — no high-quality reviews
This product: 25mg
L-Histidine
25 mg

Other Ingredients

Natural and Artificial flavors Citric Acid Malic Acid Soy Oil & Lecithin Blend Acesulfame Potassium Sucralose Calcium Silicate Silicon Dioxide FD&C Red #40 Lake FD&C Red #40

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (100% of products) Structure/Function (90% of products) Nutrient (56% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Directions: As a dietary supplement, mix one scoop (14.07 g) with 8 oz of water during and after training. For best results, consume at least one serving on non-training days, preferably upon waking.

⚠️ Warnings & Precautions

Contains: Soybeans.

Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition. Discontinue use two weeks prior to surgery.

Keep out of reach of children.

🧪 Formulation Notes

Pro Performance results GNC Pro Performance Ultra Amino Complex supplies purified and ultra-concentrated essential amino acids, including branched chain amino acids (BCAA), to help support protein synthesis. This fast-absorbing formula fuels muscle recovery and growth by helping to reduce muscle protein breakdown.

10000 mg Amino Acid Complex Fast-absorbing essential Amino Acids including a 3:1:1 ratio of BCAA

Contains: Soybeans.

Additional Information

Pro Performance quality GNC Pro Performance Ultra Amino Complex is tested and certified banned substance free. It tastes great and mixes easily with a simple stir, shake or blend.

When used in conjunction with an exercise program.

Informed-Choice.org Trusted by sport

Products bearing this logo have been tested for banned substances by LGC Science, Inc., a world-class anti-doping lab. Product was tested for over 145 banned substances on the 2017 World Anti-Doping Agency (WADA) Prohibited List via LGC skip lot testing protocol #ICP0307. See gnc.com for more information.

Banned substance free

48 servings Natural and artificial flavors

Notice: Significant product settling may occur.

Store in a cool, dry place.

Product Details

UPC / SKU 0 48107 16979 4
DSLD Entry Date 2019-09-24
Product Type Amino acid/Protein
Form Powder
DSLD ID 207201
Data Updated 2026-04-11

Research Evidence

8 Research Sources
45 Avg Quality Score
7 Clinical Trial
1 Meta Analysis
B Effects of Whey Protein, Leucine, and Vitamin D Supplementation in Patients with Sarcopenia: A Systematic Review and Meta-Analysis
Meta Analysis Nutrients 2023
C Leucine-enriched Branched-chain Amino Acid on Muscle Thickness, Interleukin-6, SOFA Score in Critical Illness
Clinical Trial ClinicalTrials.gov 2023
C The Effects of Leucine Metabolites in Performance, Body Composition and Biochemical Markers of Muscle Damage
Clinical Trial ClinicalTrials.gov 2017
C Can Supplemental Leucine Offset Disuse-induced Muscle Atrophy?
Clinical Trial ClinicalTrials.gov 2017
C Leucine Supplementation in Sarcopenic Older Individuals
Clinical Trial ClinicalTrials.gov 2019
C The Effect of Leucine on Carnitine Transport to Skeletal Muscle
Clinical Trial ClinicalTrials.gov 2016
C Hydrolyzed Casein and Whey Protein Supplementation and the Addition of Leucine to Induce Protein Anabolism in Malnourished COPD Patients
Clinical Trial ClinicalTrials.gov 2009
C Resistance Exercise Training and Amino Acid Leucine Supplementation in Frail Elderly Women
Clinical Trial ClinicalTrials.gov 2013
View all evidence for Leucine →

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