Biotherm is a French luxury skin care line owned by L'Oreal. Biotherm products' key ingredient is mineral water. The mineral thermal spring waters used in all Biotherm products are taken from springs in the Pyrenees mountain in the southern part of France and contain thermal plankton, believed to promote healthy skin and be a potent skin rejuvenator. Shop for face care, body care, sun care, and more.

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