humectants, type of moisturizer on white background.

skin moisturizer barrier hydration moisture humectants water ingredient hyaluronic acid glycerin lactic alpha hydroxy acids urea draw prevent loss occlusives emollients absorb oil lipid nutrient layer ceramides cell types cross epidermis dermis stratum corneum mechanism vector dehydration dry penetrating hydrate skincare cosmetic aesthetic cosmetology surface infographic care healthy structure flat design lubricate biology dermatology 202409-humectants type white background air background epidermis