Supplement Ratings

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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Top ratedBest value

Highest score first

457GABA 250 mg75/100Enzymatic TherapyGABA 250 mgcapsule · 30 servings · $0.42/servingBuy on iHerb · $12.56
458L-Tryptophan 1000 mg74/100Protocol For Life BalanceL-Tryptophan 1000 mgtablet · 30 servings · $1.36/servingBuy on iHerb · $40.95
459Best L-Tryptophan 500 mg74/100Doctor's BestBest L-Tryptophan 500 mgcapsule · 90 servings · $0.22/servingBuy on iHerb · $19.99
460L-Carnitine 1000 mg74/100NOWL-Carnitine 1000 mgtablet · 30 servings · $0.58/servingBuy on iHerb · $17.49
461L-Carnitine 250 mg74/100NOWL-Carnitine 250 mgcapsule · 30 servings · $0.30/servingBuy on iHerb · $8.96
462SAMe 400 mg74/100NOWSAMe 400 mgtablet · 30 servings · $0.94/servingBuy on iHerb · $28.16
463Acetyl-L Carnitine 750 mg74/100NOWAcetyl-L Carnitine 750 mgtablet · 30 servings · $0.77/servingBuy on iHerb · $23.06
464Double Strength L-Lysine 1,000 mg74/100NOWDouble Strength L-Lysine 1,000 mgtablet · 30 servings · $0.33/servingBuy on iHerb · $9.99
465L-Tryptophan 1000 mg74/100NOWL-Tryptophan 1000 mgtablet · 30 servings · $0.61/servingBuy on iHerb · $18.21
466N-Acetyl L-Tyrosine 350 mg74/100Swanson Premium BrandN-Acetyl L-Tyrosine 350 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
467L-Tyrosine 500 mg74/100Swanson Premium BrandL-Tyrosine 500 mgcapsule · 30 servings · $0.38/servingBuy on iHerb · $11.54
468Acetyl L-Carnitine 500 mg74/100Swanson Premium BrandAcetyl L-Carnitine 500 mgcapsule · 30 servings · $1.23/servingBuy on iHerb · $36.79
469Branched Chain Amino Acids74/100Swanson Premium BrandBranched Chain Amino Acidscapsule · 33 servings · $0.31/servingBuy on iHerb · $10.28
470Super Strength L-Arginine 850 mg74/100Swanson Premium BrandSuper Strength L-Arginine 850 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
471L-Glutamine 500 mg74/100Swanson Premium BrandL-Glutamine 500 mgcapsule · 30 servings · $0.47/servingBuy on iHerb · $14.19
472Optimized Carnitine74/100Life ExtensionOptimized Carnitinecapsule · 30 servings · $0.78/servingBuy on iHerb · $23.25
473BCAA + Glutamine Unflavored74/100BodyTechBCAA + Glutamine Unflavoredpowder · 30 servings · $0.83/servingBuy on iHerb · $24.99
474N-Acetyl L-Tyrosine 350 mg74/100SwansonN-Acetyl L-Tyrosine 350 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
475Acetyl L-Carnitine 500 mg74/100SwansonAcetyl L-Carnitine 500 mgcapsule · 30 servings · $1.23/servingBuy on iHerb · $36.79
476NAC Enhanced Antioxidant Formula74/100NutriCologyNAC Enhanced Antioxidant Formulatablet · 90 servings · $0.30/servingBuy on iHerb · $27.29
477L-Glutamine 1000 mg74/100Jarrow FormulasL-Glutamine 1000 mgtablet · 100 servings · $0.19/servingBuy on iHerb · $18.68
478L-Glutamine 500 mg74/100SwansonL-Glutamine 500 mgcapsule · 30 servings · $0.47/servingBuy on iHerb · $14.19
479L-Tyrosine 500 mg74/100SwansonL-Tyrosine 500 mgcapsule · 30 servings · $0.38/servingBuy on iHerb · $11.54
480Sustained plus Immediate Release L-Arginine 500 mg74/100Doctor's BestSustained plus Immediate Release L-Arginine 500 mgtablet · 60 servings · $0.35/servingBuy on iHerb · $20.99

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.