<a href="http://www.selfridges.com/GB/en/cat/beauty/fragrance/agonist/"style="text-decoration: none"><font color="black"><b>Dr Dennis Gross</b></font></a>&#39; <b>C+ Collagen Brighten + Firm Vitamin C Serum</b> is a weightless, fast-absorbing gel packed with collagen amino acids plus the brand’s proprietary vitamin C (3-O C technology) and energy complex. This innovative fuels cells for increased collagen production and accelerated repair to improve imperfections like dullness, dark spots, rough texture, and expression lines.