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Amino Acid Supplements

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  • New
    2 Flavors Available
    2 Flavors Available
    XTEND®
    XTEND® Elite Recovery* - Jolly Rancher Grape (30 Servings)
    30 servings
    1
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    $29.99
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  • Best Seller
    GNC
    GNC L-Arginine & L-Citrulline 500 mg / 500 mg - 120 Caplets (120 Servings)
    120 servings
    68
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    $39.99
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  • Best Seller
    Beyond Raw®
    Beyond Raw® Chemistry Labs™ L-Citrulline (30 Servings)
    30 servings
    44
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    $24.99
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  • Best Seller
    GNC Total Lean®
    GNC Total Lean® L-Carnitine 1000 mg - 60 Tablets (60 Servings)
    60 servings
    24
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    $29.99
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  • Best Amino Acid Supplements Of 2025
    Which amino acid supplements did GNC's Mary Milstead MS, RD, LDN list as the best of 2025? Read more to find out which made the list!
    READ MORE
  • Best Seller
    Beyond Raw®
    Beyond Raw® Chemistry Labs™ L-Carnitine (30 Servings)
    30 servings
    41
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    $24.99
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  • More Sizes Available
    More Sizes Available
    GNC
    GNC L-Arginine 1000mg - 180 Caplets (180 Servings)
    180 servings
    56
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    $35.99
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  • Beyond Raw®
    Beyond Raw® Chemistry Labs™ L-Arginine (30 Servings)
    30 servings
    30
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    $24.99
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  • Beyond Raw®
    Beyond Raw® Chemistry Labs™ HMB (30 Servings)
    30 servings
    33
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    $39.99
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  • GNC
    GNC Acetyl-L-Carnitine alpha-Lipoic Acid 500mg / 200mg - 60 Caplets (30 Servings)
    30 servings
    16
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    $29.99
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  • GNC Pro Performance®
    GNC Pro Performance® Full Spectrum Anabolic Amino 3000mg - 240 Softgels (80 Servings)
    80 servings
    58
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    $39.99
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  • 3 Flavors Available
    3 Flavors Available
    Jym®
    Jym® BCAAs + Recovery Matrix* - Fruit Punch (30 Servings)
    30 servings
    136
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    $44.99
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  • 3 Flavors Available
    3 Flavors Available
    Jym®
    Jym® BCAAs + Recovery Matrix* - Watermelon (30 Servings)
    30 servings
    136
    PRO ACCESS BOGO 50% Off Mix-and-Match
    $44.99
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  • GNC
    GNC Taurine Capsules 500 mg - 50 Vegetarian Caplets (50 Servings)
    50 servings
    14
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    $19.99
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  • GNC
    GNC Glutathione 500mg - 60 Capsules (60 Servings)
    60 servings
    27
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    $44.99
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  • Best Seller
    Codeage
    Codeage Liposomal Glutathione 1,000 MG - 60 Capsules (30 Servings)
    30 servings
    16
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    $49.99
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  • 3 Flavors Available
    3 Flavors Available
    Jym®
    Jym® Post Jym Active - Rainbow Sherbet (30 Servings)
    30 servings
    136
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    $44.99
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  • Beyond Raw®
    Beyond Raw® Chemistry Labs™ L-Glutamine (30 Servings)
    30 servings
    24
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    $24.99
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  • New
    Beyond Raw®
    Beyond Raw® Chemistry Labs™ Beta-Alanine (30 Servings)
    30 servings
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    $24.99
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  • More Sizes Available
    More Sizes Available
    GNC Pro Performance®
    GNC Pro Performance® L-Glutamine - 180 Capsules (90 Servings)
    90 servings
    35
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    $29.99
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  • Buyer Pick
    GNC
    GNC N-Acetyl-L-Cysteine NAC 600mg - 120 Vegetarian Capsules (120 Servings)
    120 servings
    12
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    $24.99
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  • 6 Flavors + More Sizes Available
    6 Flavors + More Sizes Available
    Optimum Nutrition
    Optimum Nutrition Essential AMIN.O. Energy™ - Blue Raspberry (65 Servings)
    65 servings
    313
    $49.99
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  • GHOST®
    GHOST® Intra EAA BCAA Hydration - Welch's Grape (20 Servings)
    20 servings
    21
    PRO ACCESS BOGO 50% Off Mix-and-Match
    $39.99
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  • GNC
    GNC L-Lysine 1000mg - 90 Vegetarian Tablets (90 Servings)
    90 servings
    12
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    $19.99
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  • 6 Flavors + More Sizes Available
    6 Flavors + More Sizes Available
    Optimum Nutrition
    Optimum Nutrition Essential AMIN.O. Energy™ - Concord Grape (65 Servings)
    65 servings
    313
    $49.99
  • MuscleTech™
    MuscleTech™ Clear Muscle® HMB Free Acid - Lean Muscle & Recovery - 84 Softgels (84 Servings)
    84 servings
    41
    PRO ACCESS BOGO 50% Off Mix-and-Match
    $49.99
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  • GNC Pro Performance®
    GNC Pro Performance® BCAA 1800mg - 240 Capsules (40 Servings)
    40 servings
    30
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    $34.99
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  • New
    2 Flavors Available
    2 Flavors Available
    GHOST®
    GHOST® BCAA - Strawberry Watermelon (30 Servings)
    30 servings
    113
    PRO ACCESS BOGO 50% Off Mix-and-Match
    $29.99
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  • GNC
    GNC Acetyl-L-Carnitine 500mg - 60 Capsules (60 Servings)
    60 servings
    8
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    $25.99
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  • More Sizes Available
    More Sizes Available
    GNC
    GNC L-Carnitine 500 mg - 120 Count (120 Servings)
    120 servings
    13
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    $39.99
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  • More Sizes Available
    More Sizes Available
    GNC Pro Performance®
    GNC Pro Performance® L-Glutamine 5g - Unflavored (180 Servings)
    180 servings
    32
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    $44.99
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Amino acids are molecules that make up proteins. Your body needs 20 different amino acids to function properly. Some amino acids supplements are classified as essential amino acids, meaning your body cannot produce them and they must be consumed through the diet. Essential amino acids must be consumed through the food you eat, such as beef, eggs, dairy, or supplements. Check out our best amino acid supplements guide here.

Amino acids are molecules that make up proteins. Your body needs 20 different amino acids to function properly. Some amino acids supplements are classified as essential amino acids, meaning your body cannot produce them and they must be consumed through the diet. Essential amino acids must be consumed through the food you eat, such as beef, eggs, dairy, or supplements. Check out our best amino acid supplements guide here.