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L-Lysine

Also known as: Lysine

Limited EvidenceSupplementTelogen Effluvium

Essential amino acid that may improve iron absorption and support hair growth in deficient states.

Regrowth Potential10%
Long-Term Viability45%

Mechanism of Action

L-lysine is an essential amino acid involved in collagen synthesis and iron and zinc absorption. Low iron stores are associated with telogen effluvium, and lysine supplementation may improve iron uptake, indirectly benefiting hair growth. It also contributes to the structural integrity of the hair shaft through its role in keratin cross-linking.

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