Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
441Jarrow Formulas
L-Carnitine 500 As L-Carnitine Tartrate
75/100
capsule50 servings1 ingredient
442Source Naturals
Glycine
75/100
capsule50 servings2 ingredients
443California Gold Nutrition
BCAA 500 mg
75/100
capsule60 servings1 ingredient
444Evlution Nutrition
L-Arginine1500
75/100
capsule50 servings1 ingredient
445Nature's Truth
5-HTP 200 mg
75/100
capsule25 servings1 ingredient
446Nature's Truth
GABA 750 mg
75/100
capsule60 servings1 ingredient
447Nature's Truth
L-Theanine 200 mg
75/100
capsule60 servings1 ingredient
448Nutricost
L-Arginine 500 mg & L-Citrulline 250 mg
75/100
capsule120 servings2 ingredients
449Lake Avenue Nutrition
L-Cysteine 500 mg
75/100
capsule90 servings1 ingredient
450KAL
GABA L-Theanine Stress B Lozenge Mango Tangerine
75/100
lozenge50 servings12 ingredients
451ALLMAX ESSENTIALS
NAC 600 mg
75/100
capsule60 servings1 ingredient
452Nutricost
Caffeine 100 mg with L-Theanine 100 mg
75/100
capsule240 servings2 ingredients
453Natural Factors
L-Tyrosine 1000 mg
75/100
capsule30 servings1 ingredient
454Solgar
L-Lysine 1000 mg Free Form
75/100
tablet30 servings1 ingredient
455Vital Nutrients
Acetyl L-Carnitine
75/100
capsule60 servings1 ingredient
456Source Naturals
L-Citrulline
75/100
capsule30 servings1 ingredient
457Enzymatic Therapy
GABA 250 mg
75/100
capsule30 servings1 ingredient
458Protocol For Life Balance
L-Tryptophan 1000 mg
74/100
tablet30 servings1 ingredient
459Doctor's Best
Best L-Tryptophan 500 mg
74/100
capsule90 servings1 ingredient
460NOW
L-Carnitine 1000 mg
74/100
tablet30 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 775 amino acids products, L-Carnitine 500 As L-Carnitine Tartrate ranks #1 with a SupplementScore of 75/100. 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.