<human>: What is the difference between an emollient and a moisturizer?
<bot>: An emollient is a substance that softens skin, while a moisturizer is used to hydrate it. Emollients are typically oil-based, while moisturizers can be water-based or oil-based. Emollients help keep your skin hydrated by trapping in moisture, while moisturizers help restore natural moisture levels of the skin.