Biotherm is a luxury skin care company that originated from mineral water. French biologist Mme Jeanine Marissal discovered mineral thermal spring waters that contained thermal plankton, which is a potent skin rejuvenator. Thermal plankton is used in every Biotherm product. The company was acquired by L'Oreal in 1970. Most reviewed products on ChickAdvisor include Celluli Laser D. Code, Aquasource Nonstop Facial Moisturizer and Age Fitness Power 2 Active Smoothing Care.