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Pharmaca carries a variety of natural amino acid supplements to help support healthy immune function, increase muscle metabolism and improve adrenal function. Browse our selection of amino acid supplements that come in capsules, tablets and powders, from top brands like Natural Factors, Jarrow Formulas, Now Foods, Bluebonnet, Pure Encapsulations, Source Naturals, Thorne Research and many more.

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  1. NOW NAC N-Acetyl Cysteine 600mg 250 vcaps

    Special Price $24.79 Regular Price $39.99 Save 38%
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  2. Pure Encapsulations l-Lysine 90 vcaps

    $11.90
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  3. Pure Encapsulations NAC 600mg 180 vcaps

    $49.90
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  4. Pharmaca L-Arginine 1000mg 90 vcaps

    Special Price $7.19 Regular Price $8.99 Save 20%
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  5. Jarrow Formulas Theanine 200 60 vcaps

    Special Price $16.87 Regular Price $25.95 Save 35%
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  6. Pure Encapsulations NAC (N-Acetyl-l-Cysteine) 600mg 90 vcaps

    $29.40
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  7. Pharmaca L-Theanine 200mg 60 chewables

    Special Price $15.99 Regular Price $19.99 Save 20%
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  8. Pharmaca L-Lysine 1000mg 90 vcaps

    Special Price $7.99 Regular Price $9.99 Save 20%
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  9. Jarrow Formulas NAC N-Acetyl-Cysteine 500mg 200 capsules

    Special Price $21.42 Regular Price $32.95 Save 35%
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  10. NOW Glutathione 500mg 60 vcaps

    Special Price $26.39 Regular Price $43.99 Save 40%
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  11. Jarrow Formulas NAC Sustain 600mg 100 tablets

    Special Price $19.57 Regular Price $27.95 Save 30%
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  12. NeuroScience GABA Trex 60 tablets

    $34.00
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  13. Natural Factors L-Lysine 180 vcaps

    Special Price $13.27 Regular Price $18.95 Save 30%
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  14. Jarrow Formulas Theanine 100mg 60 vcaps

    Special Price $10.37 Regular Price $15.95 Save 35%
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  15. Jarrow Formulas Arginine 1000 100 tablets

    Special Price $12.32 Regular Price $18.95 Save 35%
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  16. Source Naturals Serene Science Theanine Serene 120 tablets

    Special Price $20.13 Regular Price $28.75 Save 30%
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  17. Jarrow Formulas Taurine 100 capsules

    Special Price $8.42 Regular Price $12.95 Save 35%
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  18. Jarrow Formulas L-Lysine 100 capsules

    Special Price $6.47 Regular Price $9.95 Save 35%
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  19. Bluebonnet L-Lysine 1000 mg 50 Caplets

    Special Price $9.80 Regular Price $12.25 Save 20%
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  20. Source Naturals Serene Science L-Theanine 60 tablets

    Special Price $23.09 Regular Price $32.98 Save 30%
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