Dr. Dennis Gross Hydra-Pure Firming Serum Overview What used to be known as MD Skincare is now Dr. Dennis Gross Skincare.  It has always been the company of Dr. Dennis Gross, but now it bears his name as well.  Dr. Dennis Gross Hydra-Pure Firming Serum is billed as the ultimate anti-aging resurfacing treatment that will dramatically reduce wrinkles, lines, dark…