Glycerin (Vegetable) A favorite in keeping the skin soft. Vegetable Glycerin is derived from palm or coconut, GMO free, and also Kosher and allergen free.It is invaluable as a natural source ingredient with emollient-like properties which can soften and soothe the skin and it assists the outer epidermis to retain moisture. This helps to explain why it is one of the most popular cosmetic additives.