(TrendHunter.com) Scalp care is skin care, so it’s to be expected that an in-demand skincare ingredient—PDRN—is already breaking into the haircare category with products like VT Cosmetics’ PDRN Reedle Shot Brush…(TrendHunter.com) Scalp care is skin care, so it’s to be expected that an in-demand skincare ingredient—PDRN—is already breaking into the haircare category with products like VT Cosmetics’ PDRN Reedle Shot Brush…