Because they are unable to get it
BPC-157 is recognized for its ability to promote healing and regeneration , while TB-500 (Thymosin Beta-4) has been explored for its effects on cellular migration and tissue repair
Hung SI, Chung WH, Liou LB, Chu CC, Lin M, Huang HP, Lin YL, Lan JL, Yang LC, Hong HS, Chen MJ, Lai PC, Wu MS, Chu CY, Wang KH, Chen CH, Fann CS, Wu JY, Chen YT (2005) HLA-B*5801 allele as a genetic marker for severe cutaneous adverse reactions caused by allopurinol
The induction of RET/PTC, one of the primary oncogenes implicated in PTC, is linked to the pathogenic interaction between PTC and HT