l carnitine benefits for hair L‐Carnitine–L‐tartrate promotes human growth in vitro - Foitzik - 2007 - Experimental Dermatology L-Carnitine L-Tartrate: 8 Key Benefits
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However, such long-lasting phenotypic changes observed in somatic cells can only be sustained when an epigenetic stabilization of gene transcription or programming occurs in cells that are capable of self-renewing, are multipotent, and are required for organ development and regeneration [33]

The Hudson Riverkeeper Fund

Psychiatry 9:233

Enhanced DNA repair capacity explains GHK-Cus ability to restore replicative vitality to irradiated fibroblasts, normalizing growth dynamics to non-irradiated control levels