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

409DMG (Dimethylglycine) 125 mg75/100KirkmanDMG (Dimethylglycine) 125 mgcapsule · 100 servings · $0.36/servingBuy on iHerb · $35.79
410NAC (N-Acetyl Cysteine) 600 mg75/100Best NaturalsNAC (N-Acetyl Cysteine) 600 mgcapsule · 250 servings · $0.10/servingBuy on iHerb · $24.55
411GABA75/100Enzymatic TherapyGABAcapsule · 30 servings · $0.42/servingBuy on iHerb · $12.56
412NAC 600 mg75/100AN Amazing Nutrition Amazing FormulasNAC 600 mgcapsule · 250 servings · $0.09/servingBuy on iHerb · $22.65
413L-Arginine 1000 mg75/100Protocol For Life BalanceL-Arginine 1000 mgtablet · 120 servings · $0.27/servingBuy on iHerb · $32.96
414Acetyl L-Carnitine Alpha Lipoic Acid75/100Best NaturalsAcetyl L-Carnitine Alpha Lipoic Acidcapsule · 120 servings · $0.13/servingBuy on iHerb · $15.80
415BCAA 3200 mg75/100Best NaturalsBCAA 3200 mgcapsule · 50 servings · $0.32/servingBuy on iHerb · $16.00
416GABA 750 mg75/100Best NaturalsGABA 750 mgcapsule · 100 servings · $0.12/servingBuy on iHerb · $12.00
417NAC 600 mg75/100Best NaturalsNAC 600 mgcapsule · 120 servings · $0.10/servingBuy on iHerb · $11.70
418Beta-Alanine 3,400 mg75/100NutricostBeta-Alanine 3,400 mgcapsule · 30 servings · $0.43/servingBuy on iHerb · $12.95
419Acetyl L-Carnitine 1000mg75/100Best NaturalsAcetyl L-Carnitine 1000mgcapsule · 60 servings · $0.30/servingBuy on iHerb · $18.00
420L-Arginine + L-Citrulline 750 mg75/100NutricostL-Arginine + L-Citrulline 750 mgcapsule · 240 servings · $0.08/servingBuy on iHerb · $18.95
421SAMe 400 mg75/100NutricostSAMe 400 mgcapsule · 60 servings · $0.60/servingBuy on iHerb · $35.95
422L-Serine 500 mg75/100NutricostL-Serine 500 mgcapsule · 120 servings · $0.12/servingBuy on iHerb · $14.95
423Acetyl-L-Carnitine 500 mg75/100California Gold NutritionAcetyl-L-Carnitine 500 mgcapsule · 60 servings · $0.32/servingBuy on iHerb · $19.10
424BCAA 500 mg75/100California Gold Nutrition SPORTBCAA 500 mgcapsule · 60 servings · $0.14/servingBuy on iHerb · $8.26
425Glycine 500 mg75/100Source NaturalsGlycine 500 mgcapsule · 100 servings · $0.17/servingBuy on iHerb · $16.57
426Theanine Serene75/100Source Naturals Serene ScienceTheanine Serenetablet · 30 servings · $0.41/servingBuy on iHerb · $12.25
427L-Arginine 1,000 mg75/100Source NaturalsL-Arginine 1,000 mgtablet · 100 servings · $0.16/servingBuy on iHerb · $15.72
428L-Citrulline 500 mg75/100Source NaturalsL-Citrulline 500 mgcapsule · 30 servings · $0.73/servingBuy on iHerb · $22.05
429L-Arginine 500 mg75/100California Gold NutritionL-Arginine 500 mgcapsule · 60 servings · $0.11/servingBuy on iHerb · $6.34
430L-Citrulline 500 mg75/100California Gold NutritionL-Citrulline 500 mgcapsule · 60 servings · $0.14/servingBuy on iHerb · $8.32
431L-Cysteine 500 mg75/100California Gold NutritionL-Cysteine 500 mgcapsule · 60 servings · $0.24/servingBuy on iHerb · $14.45
432L-Glutamine75/100California Gold NutritionL-Glutaminecapsule · 60 servings · $0.18/servingBuy on iHerb · $10.67

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.