Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
1261
Sundown Naturals
L-Theanine Stress Formula with Calming Blend
80/100
capsule30 servings2 ingredients
1262California Gold Nutrition SPORT
BCAA
80/100
powder91 servings3 ingredients
1263
Nutrex Research
Glutamine Drive Black Unflavored
80/100
powder30 servings1 ingredient
1264
Nutrex Research
Glutamine Drive Black
80/100
powder60 servings1 ingredient
1265Evlution Nutrition
BCAA 5000 Unflavored
80/100
powder60 servings3 ingredients
1266Evlution Nutrition
Agmatine 750 Unflavored
80/100
powder100 servings1 ingredient
1267Evlution Nutrition
Glutamine5000 Unflavored
80/100
powder60 servings1 ingredient
1268Evlution Nutrition
L-Citrulline2000 2000 mg Unflavored
80/100
powder100 servings1 ingredient
1269
Evlution Nutrition
L-Leucine2000 Unflavored
80/100
powder100 servings1 ingredient
1270
Quantum Nutrition Labs
Quantum Glutamine
80/100
capsule100 servings1 ingredient
1271
Quantum Nutrition Labs
Quantum NAC
80/100
capsule60 servings2 ingredients
1272
Quantum Nutrition Labs
Performance Amino-GH
80/100
capsule15 servings1 ingredient
1273Doctor's Best
L-Citrulline Powder
80/100
powder66 servings1 ingredient
1274Doctor's Best
L-Tryptophan 500 mg
80/100
capsule90 servings1 ingredient
1275Doctor's Best
L-Tyrosine 500 mg
80/100
capsule120 servings1 ingredient
1276
Davinci Laboratories
L-Glutamine Powder
80/100
powder30 servings1 ingredient
1277Davinci Laboratories
N-Acetyl Cysteine 500 mg
80/100
capsule90 servings1 ingredient
1278
VitaMonk
Low Dose Caffeine & Theanine
80/100
capsule60 servings3 ingredients
1279
4DN
Glutamine Micronized Powder
80/100
powder60 servings1 ingredient
1280
Vital Nutrients
Arginine 1500 mg
80/100
capsule60 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 5,071 amino acids products, L-Theanine Stress Formula with Calming Blend ranks #1 with a SupplementScore of 80/100. Scores are based on label quality - dosage transparency, formulation cleanliness, and ingredient disclosure.
How are amino acids supplements scored?
Every product is scored algorithmically using data from the NIH Dietary Supplement Label Database. The SupplementScore evaluates dosage transparency (35 pts), label completeness (25 pts), formulation cleanliness (25 pts), and ingredient profile (15 pts).
Does a higher score mean the supplement works better?
No. The score reflects label quality, how transparent and clean the product label is, not clinical efficacy, bioavailability, or safety. A higher score means better label practices, not guaranteed results.