minoxidil powder Promote angiogenesis: increase local blood supply: hair growth relies on the vascular network of the dermal papilla to supply nutrients, in different growth cycles of hair, the mRNA expression of vascular endothelial growth factor is different, and the mRNA of vascular endothelial growth factor in the dermal papilla cells in the growth phase Strongly expressed, but less expressed during regression and telogen phases. Experiments show that minoxidil powder increases the expression of vascular endothelial cell growth factor mRNA and its protein in a dose-dependent manner, thereby promoting the formation of blood vessels in the dermal papilla and increasing the local blood supply.