Category
Amino Acids
L-theanine, L-carnitine, BCAA, NAC and other amino acids
241Swanson
5-HTP 200 mg Maximum Strength
77/100
capsule30 servings1 ingredient
242Allergy Research Group
L-Lysine
80/100
capsule50 servings1 ingredient
243NOW
L-Arginine 500 mg
75/100
capsule125 servings1 ingredient
244NOW
Double Strength L-Arginine 1000 mg
75/100
tablet30 servings1 ingredient
245NOW Sports
Arginine & Citrulline 500/250
72/100
capsule30 servings2 ingredients
246NOW Sports
Liquid L-Carnitine 1000 mg Citrus Flavor
85/100
liquid32 servings6 ingredients
247NOW
Chewable 5-HTP 100 mg Natural Citrus Flavor
77/100
chewable30 servings1 ingredient
248NOW Sports
L-Citrulline 1200 mg
77/100
tablet30 servings1 ingredient
249NOW
Double Strength L-Tryptophan 1000 mg
74/100
tablet30 servings1 ingredient
250NOW Sports
Arginine & Citrulline Powder
80/100
powder113 servings2 ingredients
251NOW
Acetyl-L-Carnitine Pure Powder
80/100
powder57 servings1 ingredient
252NOW Sports
L-Leucine Powder
80/100
powder51 servings1 ingredient
253BodyTech
Carnipure 3000 Candy Punch
83/100
powder45 servings4 ingredients
254BodyTech
Carnipure 3000 Peach Mango
83/100
powder45 servings4 ingredients
255Scivation XTEND
BCAAs Lemon Lime
41/100
powder30 servings13 ingredients
256Swanson Ultra
SAMe 200 mg
77/100
tablet30 servings1 ingredient
257Swanson Ultra
High-Potency SAMe 400 mg
77/100
tablet30 servings1 ingredient
258BSN
Amino X Blue Raz
54/100
powder30 servings5 ingredients
259BodyTech
L-Carnitine 3000 Candy Punch
80/100
powder45 servings4 ingredients
260BodyTech
L-Carnitine 3000 Peach Mango
80/100
powder45 servings4 ingredients
Frequently Asked Questions
What is the best amino acids supplement?
Based on our analysis of 775 amino acids products, 5-HTP 200 mg Maximum Strength 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.