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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AllAmino AcidsAntioxidants & LongevityAshwagandha & AdaptogensB VitaminsBiotinBlood Sugar SupportBrain & NootropicsCalciumCollagenCoQ10CreatineDigestive HealthEye HealthGreens & SuperfoodsHeart HealthHerbs & BotanicalsHormone & Sexual HealthImmune SupportIronJoint SupportLiver & DetoxMagnesiumMelatonin & SleepMinerals & ElectrolytesMultivitaminsMushroomsOmega-3 & Fish OilPre-WorkoutProbioticsProtein SupplementsTurmeric & CurcuminUrinary HealthVitamin CVitamin DVitamins A, E & KWeight ManagementZinc
Top ratedBest value

Highest score first

481L-Arginine 850 mg Maximum Strength74/100SwansonL-Arginine 850 mg Maximum Strengthcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
482Double Strength L-Tryptophan 1000 mg74/100NOWDouble Strength L-Tryptophan 1000 mgtablet · 30 servings · $0.61/servingBuy on iHerb · $18.21
483Chewable L-Theanine 100 mg74/100NOWChewable L-Theanine 100 mgchewable · 30 servings · $0.49/servingBuy on iHerb · $14.68
484NAC 500 mg74/100Mason NaturalNAC 500 mgcapsule · 30 servings · $0.33/servingBuy on iHerb · $9.94
485Suntheanine L-Theanine74/100Natural FactorsSuntheanine L-Theaninetablet · 30 servings · $0.65/servingBuy on iHerb · $19.44
486Carnosine 500 mg74/100Life ExtensionCarnosine 500 mgcapsule · 30 servings · $0.95/servingBuy on iHerb · $28.50
487Glycine 1000 mg74/100Double Wood SupplementsGlycine 1000 mgcapsule · 150 servings · $0.13/servingBuy on iHerb · $19.99
488GABA 25 mg Cherry74/100KALGABA 25 mg Cherrytablet · 120 servings · $0.09/servingBuy on iHerb · $11.32
489L-Lysine 1000 mg74/100SolarayL-Lysine 1000 mgtablet · 30 servings · $0.41/servingBuy on iHerb · $12.39
490L-Lysine Monolaurin 1:1 Ratio74/100SolarayL-Lysine Monolaurin 1:1 Ratiocapsule · 30 servings · $0.47/servingBuy on iHerb · $13.99
491SAMe 400 mg74/100Protocol For Life BalanceSAMe 400 mgtablet · 30 servings · $2.63/servingBuy on iHerb · $78.75
492SAMe 20074/100Jarrow FormulasSAMe 200tablet · 60 servings · $0.72/servingBuy on iHerb · $43.13
493Triple Strength L-Carnitine 3000mg Citrus Flavor74/100NOW SportsTriple Strength L-Carnitine 3000mg Citrus Flavorliquid · 32 servings · $0.77/servingBuy on iHerb · $24.50
494Acetyl-L Carnitine74/100NOWAcetyl-L Carnitinecapsule · 30 servings · $0.56/servingBuy on iHerb · $16.85
495L-Carnitine 1000 mg74/100VitamaticL-Carnitine 1000 mgcapsule · 60 servings · $0.25/servingBuy on iHerb · $14.99
496L-Threonine 500 mg74/100VitamaticL-Threonine 500 mgcapsule · 120 servings · $0.13/servingBuy on iHerb · $15.99
497BCAA500074/100Evlution NutritionBCAA5000capsule · 30 servings · $0.53/servingBuy on iHerb · $15.75
498L-Carnitine50074/100Evlution NutritionL-Carnitine500capsule · 120 servings · $0.13/servingBuy on iHerb · $15.99
499Acetyl-L-Carnitine with BIOSINT Carnitines 500 mg74/100Doctor's BestAcetyl-L-Carnitine with BIOSINT Carnitines 500 mgcapsule · 60 servings · $0.38/servingBuy on iHerb · $22.99
500L-Methionine 500 mg74/100SwansonL-Methionine 500 mgcapsule · 30 servings · $0.15/servingBuy on iHerb · $4.50
5015-HTP 50 mg74/100Swanson5-HTP 50 mgcapsule · 60 servings · $0.15/servingBuy on iHerb · $9.19
502BCAA74/100SwansonBCAAcapsule · 33 servings · $0.31/servingBuy on iHerb · $10.28
503GABA 750 mg Maximum Strength74/100SwansonGABA 750 mg Maximum Strengthcapsule · 60 servings · $0.19/servingBuy on iHerb · $11.29
504TMG 500 mg74/100SwansonTMG 500 mgcapsule · 45 servings · $0.25/servingBuy on iHerb · $11.09

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.