We only carry brands that use vegetable glycerin but you can find forms of it which are derived from animals or manufactured synthetically. Glycerin is a humectant which means, when it’s applied to the skin, it has the ability to draw in moisture from the surrounding environment to help maintain hydration. Because of this it is a powerful ingredient for any skin type or quality and helps to strengthen the skin’s barrier against moisture loss. Be careful in very dry environments because glycerin may draw moisture from the deeper layers of the skin where there is none to find externally. This can be counteracted with ingredients that have emollient properties which help make the skin feel soft and peachy.