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

361Double Strength Taurine77/100NOWDouble Strength Taurinecapsule · 30 servings · $0.29/servingBuy on iHerb · $8.70
362L-Tyrosine 750 mg77/100NOWL-Tyrosine 750 mgcapsule · 30 servings · $0.41/servingBuy on iHerb · $12.24
363L-Histidiine 600 mg77/100NOWL-Histidiine 600 mgcapsule · 60 servings · $0.29/servingBuy on iHerb · $17.13
364L-Theanine 200 mg77/100Protocol For Life BalanceL-Theanine 200 mgcapsule · 60 servings · $0.46/servingBuy on iHerb · $27.81
365NAC N-Acetyl-Cysteine 1000 mg77/100Protocol For Life BalanceNAC N-Acetyl-Cysteine 1000 mgtablet · 120 servings · $0.32/servingBuy on iHerb · $38.11
366SAM-e 400 mg77/100Jarrow FormulasSAM-e 400 mgtablet · 30 servings · $1.50/servingBuy on iHerb · $44.96
367L-Citrulline200077/100Evlution NutritionL-Citrulline2000capsule · 30 servings · $0.34/servingBuy on iHerb · $10.13
368Double Strength L-Arginine 1000 mg77/100NOW SportsDouble Strength L-Arginine 1000 mgtablet · 60 servings · $0.18/servingBuy on iHerb · $10.71
369L-Lysine 500 mg77/100SwansonL-Lysine 500 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
370Glutamic Acid 500 mg77/100SwansonGlutamic Acid 500 mgcapsule · 60 servings · $0.30/servingBuy on iHerb · $18.09
371Inosine77/100SwansonInosinecapsule · 60 servings · $0.18/servingBuy on iHerb · $10.59
372L-Ornithine 500 mg77/100SwansonL-Ornithine 500 mgcapsule · 30 servings · $0.31/servingBuy on iHerb · $9.23
373Taurine 500 mg77/100SwansonTaurine 500 mgcapsule · 100 servings · $0.08/servingBuy on iHerb · $8.39
374BCAA 100077/100ON Optimum NutritionBCAA 1000capsule · 100 servings · $0.25/servingBuy on iHerb · $24.70
375GABA 750 mg77/100Protocol For Life BalanceGABA 750 mgcapsule · 120 servings · $0.25/servingBuy on iHerb · $29.87
376Acetyl-L-Carnitine 500 mg77/100Doctor's BestAcetyl-L-Carnitine 500 mgcapsule · 60 servings · $0.38/servingBuy on iHerb · $22.99
377DLPA DL-Phenylalanine 500 mg77/100SolarayDLPA DL-Phenylalanine 500 mgcapsule · 60 servings · $0.30/servingBuy on iHerb · $18.29
378Acetyl L-Carnitine 500 mg77/100SolarayAcetyl L-Carnitine 500 mgcapsule · 30 servings · $0.48/servingBuy on iHerb · $14.39
379L-Tyrosine 500 mg77/100SolarayL-Tyrosine 500 mgcapsule · 50 servings · $0.24/servingBuy on iHerb · $11.79
380L-Citrulline 1200 mg Extra Strength77/100NOW SportsL-Citrulline 1200 mg Extra Strengthtablet · 30 servings · $0.82/servingBuy on iHerb · $24.49
381L-Theanine Double Strength - 200 mg77/100NOWL-Theanine Double Strength - 200 mgcapsule · 30 servings · $0.53/servingBuy on iHerb · $15.79
382Pharma GABA 100 mg77/100Natural Factors Stress-RelaxPharma GABA 100 mgcapsule · 30 servings · $0.67/servingBuy on iHerb · $20.18
383HMB 1000 Caps77/100ON Optimum NutritionHMB 1000 Capscapsule · 90 servings · $0.49/servingBuy on iHerb · $44.29
384BCAA 1000 Caps77/100Optimum NutritionBCAA 1000 Capscapsule · 100 servings · $0.25/servingBuy on iHerb · $24.70

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.