For skin, hair, and healing, the answer looks promising enough that GHK-Cu has stayed relevant for decades instead of disappearing like most peptide trends do
Anyone who suspects they have experienced an adverse reaction to any medicine or substance licensed or otherwise should report it to the MHRA via the Yellow Card scheme (yellowcard.mhra.gov.uk)
Effect of L-carnitine supplementation on some biochemical parameters in blood serum of sedentary population
Diabetes Care 32 , 14791484 (2009)
In biochemical and cellular research systems, thymalin-derived peptides are studied for their influence on gene expression, chromatin-associated regulation, and cell-cyclerelated signalling pathways, particularly in immune and progenitor cell models
These results are consistent with previous studies [30, 39]