European investigation with 20 sufferers shown substantial dermal good quality improvement and atrophic acne scar reduction from PN injections, confirming its protection and usefulness as one procedure. Nevertheless, this requires larger sized, for a longer time-expression randomized research For additional conclusive proof. 然而，生產人源膠原蛋白的成本不斐，並需要高度純化和安全處理，... https://brette062ggg8.mdkblog.com/profile