I've brought this up before on this forum and got all the same kind of advice you got, and I do everything properly, and I've been doing it once or twice a week for years, so for me it's just become a fact of life that it's going to hurt
Ageing models SAMP8 (senescence accelerated mouse prone 8): accelerated ageing, cognitive decline from 8-10 months
Others less frequently are for deeper (and sometimes painful) intramuscular injections
Yes, it may promote hair regrowth and improve coat thickness and sheen by stimulating follicle activity and reducing inflammation
One is found on the X chromosome (Xq28) and is identified as the transketolase-like 1 gene (symbol: TKTL1)
It stimulates the growth factors EGF and VEGF, activates the FAK-paxillin pathway in tendon fibroblasts, and increases growth hormone receptor expression