A glowing skin starts with deep hydration(1) Biotherm's exclusive Life Plankton™, rich in 35 nutrients, is proven to have unparalleled regenerative abilities on skin. Biotherm biologists have managed to concentrate it 3X more(2) and associate it with Mannose, a patented hydrator, to create Deep Serum. This serum helps visibly improve skin quality and create light from within.(1) Superficial layers of the epidermis, Instrumental test.(2) Than in AQUASOURCE gel