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.

  • Doses, fillers and hidden blends checked
  • Today's price and cost per serving
  • One click to order on iHerb

We may earn a commission when you buy through these links, at no extra cost to you. It never changes a score or a ranking. See how we score

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

5775-HTP 100 mg Fast Dissolve Mixed Berry71/100Natrol5-HTP 100 mg Fast Dissolve Mixed Berrytablet · 30 servings · $0.55/servingBuy on iHerb · $16.37
5785-Hydroxy-Tryptophan70/100Thorne Research5-Hydroxy-Tryptophancapsule · 45 servings · $0.87/servingBuy on iHerb · $39.00
579Muscle Strength & Restore Formula Powder70/100Life Extension Wellness CodeMuscle Strength & Restore Formula Powderpowder · 30 servings · $0.82/servingBuy on iHerb · $24.75
580HMB 1000 mg Unflavored70/100NutricostHMB 1000 mg Unflavoredpowder · 250 servings · $0.08/servingBuy on iHerb · $19.95
581L-Arginine Caps 700 mg70/100Life ExtensionL-Arginine Caps 700 mgcapsule · 30 servings · $0.68/servingBuy on iHerb · $20.25
582HMB Powder70/100NOW SportsHMB Powderpowder · 90 servings · $0.29/servingBuy on iHerb · $26.45
583SAMe70/100Metabolic MaintenanceSAMecapsule · 30 servings · $2.33/servingBuy on iHerb · $70.00
584SAMe 200 mg70/100Metabolic MaintenanceSAMe 200 mgcapsule · 30 servings · $2.33/servingBuy on iHerb · $70.00
585BCAA 6 g Watermelon70/100Nutricost WomenBCAA 6 g Watermelonpowder · 30 servings · $0.63/servingBuy on iHerb · $18.95
586L-Glutamine 500 mg70/100Country LifeL-Glutamine 500 mgcapsule · 100 servings · $0.17/servingBuy on iHerb · $17.19
587Pure D-Ribose Powder69/100Doctor's BestPure D-Ribose Powderpowder · 50 servings · $0.64/servingBuy on iHerb · $31.99
588SAM-e 200 mg69/100Doctor's BestSAM-e 200 mgtablet · 60 servings · $0.57/servingBuy on iHerb · $33.99
589Ribose69/100CarlsonRibosepowder · 33 servings · $0.64/servingBuy on iHerb · $21.17
590Total Amino69/100Lake Avenue NutritionTotal Aminocapsule · 60 servings · $0.35/servingBuy on iHerb · $20.95
591SAMe 400 mg69/100California Gold NutritionSAMe 400 mgtablet · 60 servings · $0.73/servingBuy on iHerb · $43.71
592L-Lysine 985 mg69/100SolarayL-Lysine 985 mgtablet · 30 servings · $0.41/servingBuy on iHerb · $12.39
593Calm Drops Lozenges Raspberry Flavored69/100Nature's WayCalm Drops Lozenges Raspberry Flavoredlozenge · 24 servings · $0.54/servingBuy on iHerb · $12.99
594Best D-Ribose Powder69/100Doctor's BestBest D-Ribose Powderpowder · 50 servings · $0.64/servingBuy on iHerb · $31.99
595DMG 125 mg68/100NOWDMG 125 mgcapsule · 30 servings · $0.35/servingBuy on iHerb · $10.40
596L-Carnitine 500 mg68/100Swanson Premium BrandL-Carnitine 500 mgtablet · 30 servings · $0.62/servingBuy on iHerb · $18.74
597Amino Complex Berry Flavored68/100ThorneAmino Complex Berry Flavoredpowder · 30 servings · $1.73/servingBuy on iHerb · $52.00
598SAMe 400 mg68/100Life ExtensionSAMe 400 mgtablet · 30 servings · $1.75/servingBuy on iHerb · $52.50
599SAMe 200 mg68/100Life ExtensionSAMe 200 mgtablet · 30 servings · $0.68/servingBuy on iHerb · $20.25
600L-Carnitine 500 mg68/100SwansonL-Carnitine 500 mgtablet · 30 servings · $0.62/servingBuy on iHerb · $18.74

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.