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

313GABA Gamma Aminobutyric Acid 250 mg77/100Swanson Premium BrandGABA Gamma Aminobutyric Acid 250 mgcapsule · 30 servings · $0.36/servingBuy on iHerb · $10.79
314L-Citrulline Malate Complex 750 mg77/100Swanson Premium BrandL-Citrulline Malate Complex 750 mgcapsule · 30 servings · $0.49/servingBuy on iHerb · $14.79
315DL- Phenylalanine 500 mg77/100Swanson Premium BrandDL- Phenylalanine 500 mgcapsule · 30 servings · $0.42/servingBuy on iHerb · $12.59
316Inosine 500 mg77/100Swanson Premium BrandInosine 500 mgcapsule · 30 servings · $0.35/servingBuy on iHerb · $10.59
317GABA Gamma Aminobutyric Acid 500 mg77/100Swanson Premium BrandGABA Gamma Aminobutyric Acid 500 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
318Taurine 1000 mg77/100BluebonnetTaurine 1000 mgcapsule · 30 servings · $0.48/servingBuy on iHerb · $14.36
319Maximum Strength 5-HTP 200 mg77/100Swanson UltraMaximum Strength 5-HTP 200 mgcapsule · 30 servings · $0.56/servingBuy on iHerb · $16.79
320Maximum-Strength GABA 750 mg77/100Swanson UltraMaximum-Strength GABA 750 mgcapsule · 30 servings · $0.38/servingBuy on iHerb · $11.29
321Maximum-Strength Arginine AKG 1,000 mg77/100Swanson UltraMaximum-Strength Arginine AKG 1,000 mgcapsule · 30 servings · $0.53/servingBuy on iHerb · $15.89
322Acetyl-L-Carnitine Arginate77/100Life ExtensionAcetyl-L-Carnitine Arginatecapsule · 30 servings · $0.95/servingBuy on iHerb · $28.50
323Pharma GABA 250 mg77/100Natural Factors Stress-RelaxPharma GABA 250 mgcapsule · 30 servings · $1.20/servingBuy on iHerb · $36.02
324Acetyl-L-Carnitine 500 mg77/100Allergy Research GroupAcetyl-L-Carnitine 500 mgcapsule · 50 servings · $1.53/servingBuy on iHerb · $76.39
325TMG77/100Allergy Research GroupTMGcapsule · 100 servings · $0.28/servingBuy on iHerb · $27.60
326Free-Form L-Lysine 500 mg77/100Swanson Premium BrandFree-Form L-Lysine 500 mgcapsule · 30 servings · $0.37/servingBuy on iHerb · $11.09
327Pharmaceutical Grade AjiPure Glycine 500 mg77/100Swanson UltraPharmaceutical Grade AjiPure Glycine 500 mgcapsule · 30 servings · $0.24/servingBuy on iHerb · $7.14
328Glutamic Acid 500 mg77/100Swanson Premium BrandGlutamic Acid 500 mgcapsule · 30 servings · $0.60/servingBuy on iHerb · $18.09
329Free-Form Lysine 500 mg77/100SwansonFree-Form Lysine 500 mgcapsule · 30 servings · $0.61/servingBuy on iHerb · $18.19
330L-Citrulline Malate 750 mg77/100SwansonL-Citrulline Malate 750 mgcapsule · 30 servings · $0.49/servingBuy on iHerb · $14.79
331Acetyl L-Carnitine 500 mg77/100Jarrow FormulasAcetyl L-Carnitine 500 mgcapsule · 60 servings · $0.35/servingBuy on iHerb · $21.10
332L-Carnitine 500 mg77/100Jarrow FormulasL-Carnitine 500 mgcapsule · 50 servings · $0.46/servingBuy on iHerb · $22.93
333L-Glutamine 750 mg77/100Jarrow FormulasL-Glutamine 750 mgcapsule · 120 servings · $0.15/servingBuy on iHerb · $17.94
3345-HTP 100 mg77/100Jarrow Formulas5-HTP 100 mgcapsule · 60 servings · $0.43/servingBuy on iHerb · $25.69
335L-Cysteine 500 mg77/100SolgarL-Cysteine 500 mgcapsule · 30 servings · $0.66/servingBuy on iHerb · $19.69
336SAMe 200 mg77/100Jarrow FormulasSAMe 200 mgtablet · 60 servings · $0.72/servingBuy on iHerb · $43.13

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.