"Skinceuticals C E Ferulic ($129) is a must have for my morning skincare routine," Dr. Nussbaum said. "It contains powerhouse antioxidants like vitamin C + E that brighten the skin and neutralise free radicals induced by environmental stressors like UVA/UVB rays, which can accelerate skin ageing. The sun decreases elastin and collagen, which increases skin laxity. Therefore, vitamin C will truly tighten and brighten the skin."