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

145L-Serine 2000 mg80/100Double Wood SupplementsL-Serine 2000 mgcapsule · 45 servings · $0.44/servingBuy on iHerb · $19.95
146L-Theanine 200 mg80/100Double Wood SupplementsL-Theanine 200 mgcapsule · 120 servings · $0.17/servingBuy on iHerb · $19.95
147L-Theanine 200 mg80/100Nature's WayL-Theanine 200 mgcapsule · 90 servings · $0.41/servingBuy on iHerb · $36.72
148L-Taurine 325 mg80/100KirkmanL-Taurine 325 mgcapsule · 100 servings · $0.42/servingBuy on iHerb · $42.23
149L-Carnosine80/100ParadiseL-Carnosinecapsule · 30 servings · $1.00/servingBuy on iHerb · $29.99
150Glycine80/100Metabolic MaintenanceGlycinecapsule · 30 servings · $1.60/servingBuy on iHerb · $48.00
151L-Theanine80/100Metabolic MaintenanceL-Theaninecapsule · 30 servings · $2.40/servingBuy on iHerb · $72.10
152NAC80/100Metabolic MaintenanceNACcapsule · 30 servings · $1.12/servingBuy on iHerb · $33.60
153L-Lysine Beta Glucan 1000 mg80/100SolarayL-Lysine Beta Glucan 1000 mgcapsule · 30 servings · $0.43/servingBuy on iHerb · $12.89
154AKG Alpha-Ketoglutaric Acid 1000 mg80/100Double Wood SupplementsAKG Alpha-Ketoglutaric Acid 1000 mgcapsule · 90 servings · $0.33/servingBuy on iHerb · $29.95
155L-Glutamine Pure Powder80/100Protocol For Life BalanceL-Glutamine Pure Powderpowder · 91 servings · $0.48/servingBuy on iHerb · $44.10
156L-Lysine 500 mg80/100SolarayL-Lysine 500 mgcapsule · 60 servings · $0.13/servingBuy on iHerb · $7.89
157Glutamine80/100ALLMAXGlutaminepowder · 200 servings · $0.25/servingBuy on iHerb · $49.99
158BCAA80/100ALLMAXBCAApowder · 80 servings · $0.31/servingBuy on iHerb · $24.99
159Beta-Alanine80/100ALLMAXBeta-Alaninepowder · 125 servings · $0.26/servingBuy on iHerb · $32.37
160Leucine+80/100ALLMAXLeucine+powder · 80 servings · $0.36/servingBuy on iHerb · $28.67
161Taurine80/100ALLMAXTaurineliquid · 133 servings · $0.15/servingBuy on iHerb · $20.59
162L-Theanine 200 mg80/100SportsResearchL-Theanine 200 mgsoftgel · 60 servings · $0.35/servingBuy on iHerb · $20.97
163L-Theanine 200 mg80/100SR Sports ResearchL-Theanine 200 mgsoftgel · 60 servings · $0.35/servingBuy on iHerb · $20.97
164Taurine80/100NOWTaurinepowder · 227 servings · $0.05/servingBuy on iHerb · $11.01
165L-Glutamine80/100Healthy OriginsL-Glutaminepowder · 60 servings · $0.24/servingBuy on iHerb · $14.24
166L-Theanine 150 mg80/100Doctor's BestL-Theanine 150 mgcapsule · 90 servings · $0.24/servingBuy on iHerb · $21.99
167GABA Pure Powder80/100Best NaturalsGABA Pure Powderpowder · 227 servings · $0.11/servingBuy on iHerb · $24.00
168Glycine Pure Powder80/100Best NaturalsGlycine Pure Powderpowder · 454 servings · $0.03/servingBuy on iHerb · $14.56

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.