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

73L-Arginine & L-Ornithine80/100SwansonL-Arginine & L-Ornithinecapsule · 30 servings · $0.57/servingBuy on iHerb · $17.21
74TMG Trimethylglycine 1,000 mg80/100SwansonTMG Trimethylglycine 1,000 mgcapsule · 45 servings · $0.25/servingBuy on iHerb · $11.09
75L-Glutamine Powder80/100ThorneL-Glutamine Powderpowder · 90 servings · $0.74/servingBuy on iHerb · $67.00
76Inositol Powder80/100Vital NutrientsInositol Powderpowder · 56 servings · $0.71/servingBuy on iHerb · $39.99
77NAC 600 mg80/100Vital NutrientsNAC 600 mgcapsule · 50 servings · $0.64/servingBuy on iHerb · $31.99
78Taurine 1000 mg80/100Vital NutrientsTaurine 1000 mgcapsule · 60 servings · $0.43/servingBuy on iHerb · $25.99
79PharmaGABA-10080/100ThornePharmaGABA-100capsule · 30 servings · $1.13/servingBuy on iHerb · $34.00
80PharmaGABA-25080/100ThornePharmaGABA-250capsule · 30 servings · $1.97/servingBuy on iHerb · $59.00
81L-Lysine80/100Pure EncapsulationsL-Lysinecapsule · 270 servings · $0.15/servingBuy on iHerb · $41.50
82NAC 900 mg80/100Pure EncapsulationsNAC 900 mgcapsule · 120 servings · $0.48/servingBuy on iHerb · $58.20
83Taurine 500 mg80/100Allergy Research GroupTaurine 500 mgcapsule · 100 servings · $0.18/servingBuy on iHerb · $18.19
84L-Methionine80/100NutriCologyL-Methioninecapsule · 100 servings · $0.28/servingBuy on iHerb · $28.29
85L-Arginine AKG Unflavored80/100BodyTechL-Arginine AKG Unflavoredpowder · 30 servings · $0.67/servingBuy on iHerb · $19.99
86Glutamine Unflavored80/100BodyTechGlutamine Unflavoredpowder · 70 servings · $0.39/servingBuy on iHerb · $26.99
87L-Glutamine Powder80/100Pure EncapsulationsL-Glutamine Powderpowder · 73 servings · $0.75/servingBuy on iHerb · $55.00
88L-Theanine80/100Pure EncapsulationsL-Theaninecapsule · 60 servings · $1.97/servingBuy on iHerb · $118.45
89SAMe (S-Adenosylmethionine)80/100Pure EncapsulationsSAMe (S-Adenosylmethionine)capsule · 60 servings · $1.41/servingBuy on iHerb · $84.50
90Taurine 1,000 mg80/100Pure EncapsulationsTaurine 1,000 mgcapsule · 120 servings · $0.29/servingBuy on iHerb · $35.00
91Pharmaceutical Grade AjiPure L-Histidine 500 mg80/100Swanson UltraPharmaceutical Grade AjiPure L-Histidine 500 mgcapsule · 30 servings · $0.64/servingBuy on iHerb · $19.19
92NAC80/100Integrative TherapeuticsNACcapsule · 30 servings · $0.60/servingBuy on iHerb · $18.00
93L-Glutamine 500 mg80/100Pure EncapsulationsL-Glutamine 500 mgcapsule · 90 servings · $0.27/servingBuy on iHerb · $24.50
94L-Theanine 200 mg Double Strength80/100SwansonL-Theanine 200 mg Double Strengthcapsule · 30 servings · $0.88/servingBuy on iHerb · $26.25
95Pharmaceutical Grade AjiPure Taurine 1 g80/100Swanson UltraPharmaceutical Grade AjiPure Taurine 1 gcapsule · 30 servings · $0.45/servingBuy on iHerb · $13.48
96L-Arginine 500 mg80/100SolgarL-Arginine 500 mgcapsule · 30 servings · $0.45/servingBuy on iHerb · $13.49

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.