Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
301NOW
Acetyl-L Carnitine 500 mg
77/100
capsule30 servings1 ingredient
302Solaray
L-Methionine 500 mg
77/100
capsule30 servings1 ingredient
303NOW
Chewable 5-HTP 100 mg
77/100
tablet30 servings1 ingredient
304NOW
L-Proline 500 mg
77/100
capsule60 servings1 ingredient
305Protocol For Life Balance
L-Carnitine 500 mg
77/100
capsule30 servings1 ingredient
306Thorne Research
Theanine
77/100
capsule30 servings1 ingredient
307Thorne Research
Glycine
77/100
capsule125 servings1 ingredient
308Thorne Research
L-Lysine
77/100
capsule30 servings1 ingredient
309Thorne Research
L-Glutamine
77/100
capsule30 servings1 ingredient
310Thorne Research
Carnityl
77/100
capsule30 servings1 ingredient
311Thorne Research
Perfusia-SR
77/100
capsule60 servings1 ingredient
312Thorne Research
Cysteplus
77/100
capsule30 servings1 ingredient
313Swanson Premium Brand
GABA Gamma Aminobutyric Acid 250 mg
77/100
capsule30 servings1 ingredient
314Swanson Premium Brand
L-Citrulline Malate Complex 750 mg
77/100
capsule30 servings1 ingredient
315Swanson Premium Brand
DL- Phenylalanine 500 mg
77/100
capsule30 servings1 ingredient
316Swanson Premium Brand
Inosine 500 mg
77/100
capsule30 servings1 ingredient
317Swanson Premium Brand
GABA Gamma Aminobutyric Acid 500 mg
77/100
capsule30 servings1 ingredient
318Bluebonnet
Taurine 1000 mg
77/100
capsule30 servings1 ingredient
319Swanson Ultra
Maximum Strength 5-HTP 200 mg
77/100
capsule30 servings1 ingredient
320Swanson Ultra
Maximum-Strength GABA 750 mg
77/100
capsule30 servings1 ingredient
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 775 amino acids products, Acetyl-L Carnitine 500 mg ranks #1 with a SupplementScore of 77/100. 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.