Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
81Pure Encapsulations
L-Lysine
80/100
capsule270 servings1 ingredient
82Pure Encapsulations
NAC 900 mg
80/100
capsule120 servings1 ingredient
83Allergy Research Group
Taurine 500 mg
80/100
capsule100 servings1 ingredient
84NutriCology
L-Methionine
80/100
capsule100 servings1 ingredient
85BodyTech
L-Arginine AKG Unflavored
80/100
powder30 servings1 ingredient
86BodyTech
Glutamine Unflavored
80/100
powder70 servings1 ingredient
87Pure Encapsulations
L-Glutamine Powder
80/100
powder73 servings1 ingredient
88Pure Encapsulations
L-Theanine
80/100
capsule60 servings1 ingredient
89Pure Encapsulations
SAMe (S-Adenosylmethionine)
80/100
capsule60 servings1 ingredient
90Pure Encapsulations
Taurine 1,000 mg
80/100
capsule120 servings1 ingredient
91Swanson Ultra
Pharmaceutical Grade AjiPure L-Histidine 500 mg
80/100
capsule30 servings1 ingredient
92Integrative Therapeutics
NAC
80/100
capsule30 servings1 ingredient
93Pure Encapsulations
L-Glutamine 500 mg
80/100
capsule90 servings1 ingredient
94Swanson
L-Theanine 200 mg Double Strength
80/100
capsule30 servings1 ingredient
95Swanson Ultra
Pharmaceutical Grade AjiPure Taurine 1 g
80/100
capsule30 servings1 ingredient
96Solgar
L-Arginine 500 mg
80/100
capsule30 servings1 ingredient
97Solgar
L-Theanine 150 mg
80/100
capsule30 servings1 ingredient
98Allergy Research Group
Taurine Free Form Amino Acid
80/100
capsule50 servings1 ingredient
99Doctor's Best
5-HTP 100 mg
80/100
capsule60 servings1 ingredient
100Doctor's Best
Pure L-Arginine Powder
80/100
powder50 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 775 amino acids products, L-Lysine 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.