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

289Inositol + Glycine78/100Advanced Nutrition by ZahlerInositol + Glycinepowder · 60 servings · $0.43/servingBuy on iHerb · $25.97
290DL-Phenylalanine 750 mg78/100Davinci LaboratoriesDL-Phenylalanine 750 mgcapsule · 60 servings · $0.46/servingBuy on iHerb · $27.57
291NAC 600 mg78/100Sports ResearchNAC 600 mgcapsule · 90 servings · $0.23/servingBuy on iHerb · $20.97
292DMG 500 mg78/100ZahlerDMG 500 mgtablet · 90 servings · $0.46/servingBuy on iHerb · $41.57
293NAC N-Acetyl-L-Cysteine 500 mg78/100Natural FactorsNAC N-Acetyl-L-Cysteine 500 mgcapsule · 30 servings · $0.48/servingBuy on iHerb · $14.39
294NAC78/100CarlsonNACcapsule · 30 servings · $0.55/servingBuy on iHerb · $16.58
295L-Glutamine78/100CarlsonL-Glutaminecapsule · 30 servings · $0.56/servingBuy on iHerb · $16.90
296DLPA78/100CarlsonDLPAcapsule · 30 servings · $0.41/servingBuy on iHerb · $12.27
297NAC N-Acetyl-L-Cysteine 600 mg78/100Natural FactorsNAC N-Acetyl-L-Cysteine 600 mgcapsule · 30 servings · $0.38/servingBuy on iHerb · $11.51
298L-Lysine 500 mg77/100NOWL-Lysine 500 mgtablet · 30 servings · $0.20/servingBuy on iHerb · $6.11
299Double Strength Taurine 1000 mg77/100NOWDouble Strength Taurine 1000 mgcapsule · 30 servings · $0.58/servingBuy on iHerb · $17.40
300L-Carnosine 500 mg77/100NOWL-Carnosine 500 mgcapsule · 30 servings · $0.65/servingBuy on iHerb · $19.58
301Acetyl-L Carnitine 500 mg77/100NOWAcetyl-L Carnitine 500 mgcapsule · 30 servings · $0.34/servingBuy on iHerb · $10.29
302L-Methionine 500 mg77/100SolarayL-Methionine 500 mgcapsule · 30 servings · $0.31/servingBuy on iHerb · $9.29
303Chewable 5-HTP 100 mg77/100NOWChewable 5-HTP 100 mgtablet · 30 servings · $0.57/servingBuy on iHerb · $17.13
304L-Proline 500 mg77/100NOWL-Proline 500 mgcapsule · 60 servings · $0.19/servingBuy on iHerb · $11.62
305L-Carnitine 500 mg77/100Protocol For Life BalanceL-Carnitine 500 mgcapsule · 30 servings · $0.94/servingBuy on iHerb · $28.35
306Theanine77/100Thorne ResearchTheaninecapsule · 30 servings · $2.27/servingBuy on iHerb · $68.00
307Glycine77/100Thorne ResearchGlycinecapsule · 125 servings · $0.25/servingBuy on iHerb · $31.00
308L-Lysine77/100Thorne ResearchL-Lysinecapsule · 30 servings · $0.50/servingBuy on iHerb · $15.00
309L-Glutamine77/100Thorne ResearchL-Glutaminecapsule · 30 servings · $0.87/servingBuy on iHerb · $26.00
310Carnityl77/100Thorne ResearchCarnitylcapsule · 30 servings · $1.07/servingBuy on iHerb · $32.00
311Perfusia-SR77/100Thorne ResearchPerfusia-SRcapsule · 60 servings · $0.73/servingBuy on iHerb · $44.00
312Cysteplus77/100Thorne ResearchCystepluscapsule · 30 servings · $1.10/servingBuy on iHerb · $33.00

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.