iHerb picks

Best Amino Acids on iHerb

Skip hours of label reading. Every pick below is sold on iHerb and passed our label check with 60+ points, so whatever you choose is worth taking, and you see today's price before you click.

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Highest score first

83/100Doctor's BestL-Theanine With Suntheanine 150 mgcapsule · 90 servings · $0.24/servingBuy on iHerb · $21.99

82/100Country LifeL-Theanine 100 mglozenge · 30 servings · $0.82/servingBuy on iHerb · $24.69

81/100ThorneAmino Complex Lemon Flavoredpowder · 30 servings · $1.73/servingBuy on iHerb · $52.00

81/100NutriCologyFree Aminoscapsule · 50 servings · $0.87/servingBuy on iHerb · $43.29

81/100DaVinci Laboratories Of VermontAmino 21capsule · 90 servings · $0.40/servingBuy on iHerb · $36.00

81/100KirkmanAmino Supportcapsule · 38 servings · $1.53/servingBuy on iHerb · $58.20

81/100Metabolic MaintenanceSAMe 200 mg + Cofactorscapsule · 60 servings · $1.22/servingBuy on iHerb · $73.00

81/100Davinci LaboratoriesAmino 21capsule · 90 servings · $0.40/servingBuy on iHerb · $36.00

81/100NutriGLYNAC-ET 1050/100 mgcapsule · 30 servings · $0.70/servingBuy on iHerb · $20.99

80/100Protocol For Life BalanceL-Tryptophan 500 mgcapsule · 30 servings · $0.81/servingBuy on iHerb · $24.15

80/100NOWTaurine Free-Form Amino Acid 500 mgcapsule · 30 servings · $0.20/servingBuy on iHerb · $6.11

80/100NOW5-HTP 50 mgcapsule · 30 servings · $0.16/servingBuy on iHerb · $4.88

80/100NOWTaurine 500 mgcapsule · 30 servings · $0.20/servingBuy on iHerb · $6.11

80/100NOWL-Theanine 100 mg Suntheaninecapsule · 30 servings · $0.38/servingBuy on iHerb · $11.43

80/100NOWDouble Strength L-Theanine 200 mg Suntheaninecapsule · 30 servings · $0.53/servingBuy on iHerb · $15.79

80/100NOW5-HTP 100 mgcapsule · 30 servings · $0.35/servingBuy on iHerb · $10.40

80/100NOWL-Tryptophan 500 mgcapsule · 30 servings · $0.42/servingBuy on iHerb · $12.69

80/100NOW SportsAcetyl-L Carnitinepowder · 113 servings · $0.16/servingBuy on iHerb · $18.36

80/100NOW SportsL-Arginine Powderpowder · 217 servings · $0.22/servingBuy on iHerb · $47.17

80/100NOW SportsBranched Chain Amino Acid Powderpowder · 68 servings · $0.43/servingBuy on iHerb · $29.39

80/100NOWL-Citrullinepowder · 75 servings · $0.27/servingBuy on iHerb · $20.20

80/100NOWGABApowder · 340 servings · $0.04/servingBuy on iHerb · $12.24

80/100NOW SportsL-Glutamine Powderpowder · 34 servings · $0.36/servingBuy on iHerb · $12.24

80/100NOWGlycinepowder · 454 servings · $0.04/servingBuy on iHerb · $18.37

Scores rate what's on the label (dosage transparency, cleanliness, ingredient profile), not clinical results. Prices come from the iHerb catalog feed and can change at checkout. See the full Best Amino Acids ranking.