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
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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

5055-HTP74/100Source Naturals5-HTPcapsule · 60 servings · $0.28/servingBuy on iHerb · $16.79
506SAMe Iso Active 200 mg74/100Natural FactorsSAMe Iso Active 200 mgtablet · 30 servings · $1.17/servingBuy on iHerb · $34.97
5075-HTP Enhanced with Vitamins B6 and C73/100Doctor's Best5-HTP Enhanced with Vitamins B6 and Ccapsule · 120 servings · $0.14/servingBuy on iHerb · $16.99
508Intra Blast Grape Berry Crush73/100NutraBioIntra Blast Grape Berry Crushpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
509Intra Blast New York Punch73/100NutraBioIntra Blast New York Punchpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
510Intra Blast Strawberry Lemon Bomb73/100NutraBioIntra Blast Strawberry Lemon Bombpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
511Intra Blast Dragonfruit Candy73/100NutraBioIntra Blast Dragonfruit Candypowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
512Intra Blast Sweet Tea73/100NutraBioIntra Blast Sweet Teapowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
513Intra Blast Tropical Fruit Punch73/100NutraBioIntra Blast Tropical Fruit Punchpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
514Intra Blast Passion Fruit73/100NutraBioIntra Blast Passion Fruitpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
515Intra Blast Orange Mango73/100NutraBioIntra Blast Orange Mangopowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
516Plant Aminos73/100Triquetra HealthPlant Aminostablet · 60 servings · $0.57/servingBuy on iHerb · $34.35
517L-Tryptophan73/100Metabolic MaintenanceL-Tryptophancapsule · 30 servings · $1.40/servingBuy on iHerb · $42.00
518NAC+73/100KALNAC+tablet · 60 servings · $0.30/servingBuy on iHerb · $18.01
519GABA L-Theanine Stress B Lozenge Natural Mango Tangerine Flavor73/100KALGABA L-Theanine Stress B Lozenge Natural Mango Tangerine Flavorlozenge · 50 servings · $0.27/servingBuy on iHerb · $13.59
5205-HTP Plus+ 200 mg73/100NatureWise5-HTP Plus+ 200 mgcapsule · 30 servings · $0.49/servingBuy on iHerb · $14.69
5215-HTP with Vitamin B6 & Vitamin C73/100Lake Avenue Nutrition5-HTP with Vitamin B6 & Vitamin Ccapsule · 60 servings · $0.17/servingBuy on iHerb · $10.36
522L-Tryptophan 500 mg73/100Metabolic MaintenanceL-Tryptophan 500 mgcapsule · 60 servings · $0.70/servingBuy on iHerb · $42.00
523Plant Aminos73/100TriquetraPlant Aminostablet · 60 servings · $0.57/servingBuy on iHerb · $34.35
524NAC N-Acetyl-L-Cysteine73/100Lake Avenue NutritionNAC N-Acetyl-L-Cysteinecapsule · 120 servings · $0.17/servingBuy on iHerb · $20.36
5255-HTP 100 mg73/100NatureWise5-HTP 100 mgcapsule · 120 servings · $0.16/servingBuy on iHerb · $18.99
526Intra Blast Fruit Punch73/100NutraBioIntra Blast Fruit Punchpowder · 30 servings · $1.67/servingBuy on iHerb · $49.99
5275-HTP72/100Nature's Way5-HTPtablet · 30 servings · $0.43/servingBuy on iHerb · $12.98
528Arginine & Citruline 500/25072/100NOW SportsArginine & Citruline 500/250capsule · 60 servings · $0.28/servingBuy on iHerb · $16.52

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.