Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
581Life Extension
L-Arginine Caps 700 mg
70/100
capsule30 servings2 ingredients
582NOW Sports
HMB Powder
70/100
powder90 servings2 ingredients
583Metabolic Maintenance
SAMe
70/100
capsule30 servings3 ingredients
584Metabolic Maintenance
SAMe 200 mg
70/100
capsule30 servings3 ingredients
585Nutricost Women
BCAA 6 g Watermelon
70/100
powder30 servings10 ingredients
586Country Life
L-Glutamine 500 mg
70/100
capsule100 servings2 ingredients
587Doctor's Best
Pure D-Ribose Powder
69/100
powder50 servings3 ingredients
588Doctor's Best
SAM-e 200 mg
69/100
tablet60 servings1 ingredient
589Carlson
Ribose
69/100
powder33 servings3 ingredients
590Lake Avenue Nutrition
Total Amino
69/100
capsule60 servings4 ingredients
591California Gold Nutrition
SAMe 400 mg
69/100
tablet60 servings1 ingredient
592Solaray
L-Lysine 985 mg
69/100
tablet30 servings5 ingredients
593Nature's Way
Calm Drops Lozenges Raspberry Flavored
69/100
lozenge24 servings3 ingredients
594Doctor's Best
Best D-Ribose Powder
69/100
powder50 servings3 ingredients
595NOW
DMG 125 mg
68/100
capsule30 servings2 ingredients
596Swanson Premium Brand
L-Carnitine 500 mg
68/100
tablet30 servings1 ingredient
597Thorne
Amino Complex Berry Flavored
68/100
powder30 servings13 ingredients
598Life Extension
SAMe 400 mg
68/100
tablet30 servings1 ingredient
599Life Extension
SAMe 200 mg
68/100
tablet30 servings1 ingredient
600Swanson
L-Carnitine 500 mg
68/100
tablet30 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 775 amino acids products, L-Arginine Caps 700 mg ranks #1 with a SupplementScore of 70/100. 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.