Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
2981California Gold Nutrition
L-Theanine 100 mg
78/100
capsule30 servings1 ingredient
2982
California Gold Nutrition
L-Tyrosine 500 mg
75/100
capsule60 servings1 ingredient
2983Metabolic Maintenance
L-Theanine 200 mg
83/100
capsule120 servings1 ingredient
2984
Gorilla Mind
Gorilla Mode EAAS Lemon Lime
62/100
powder30 servings9 ingredients
2985Douglas Laboratories
N-Acetyl-L-Cysteine 900 mg
80/100
capsule90 servings1 ingredient
2986California Gold Nutrition
L-Theanine 200 mg
78/100
capsule60 servings1 ingredient
2987Source Naturals
Amino Day
75/100
tablet40 servings4 ingredients
2988
Indiana Botanic Gardens
L-Tryptophan
77/100
capsule30 servings1 ingredient
2989
PCOS Nutrition Center
N-Acetyl-L-Cysteine NAC
80/100
capsule120 servings1 ingredient
2990
GNC Mega Men
Carnitine 500
80/100
capsule30 servings1 ingredient
2991Source Naturals Serene Science
GABA Calm
66/100
lozenge120 servings5 ingredients
2992
Nature's Blend
Lysine 1000 mg
72/100
tablet50 servings1 ingredient
2993
Nature's Blend
Lysine 500 mg
69/100
tablet100 servings1 ingredient
2994
Universal Nutrition
Universal Amino 2700
62/100
tablet116 servings21 ingredients
2995
Natrol
Daily Stress Relief
73/100
tablet30 servings6 ingredients
2996Source Naturals
L-Arginine 500 mg
64/100
capsule50 servings3 ingredients
2997
Source Naturals
L-Aspartic Acid Powder
80/100
powder52 servings2 ingredients
2998Source Naturals
L-Citrulline 1000 mg
72/100
tablet30 servings1 ingredient
2999
Source Naturals
L-Cysteine Powder
80/100
powder83 servings1 ingredient
3000Source Naturals
L-Glutamine 500 mg
75/100
capsule100 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 5,071 amino acids products, L-Theanine 100 mg ranks #1 with a SupplementScore of 78/100. 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.