Glycerin is a natural emollient and has a cooling effect on skin. Being a humectant (which means that it attracts water, i.e. moisture), it draws oxygen into the skin thus helping it retain moisture. It can be used on hair too.
Although it can be applied topically on skin, putting it directly on to your hair will result in a gooey mess. Here's how you can make the best of it.
Curly hairWhile curly hair is beautiful to look at, it is in no way low-maintenance. If there is one word that fills every curly-haired girl with dread, it has to be frizz. Glycerin draws moisture from the air into the hair shaft. It works well as a conditioner since curly hair tends to get drier than other hair types because of the shape of the hair shaft.
Whip it up: Make a hydrating glycerin hair spray by mixing equal quantities of vegetable glycerin and water. Shake well. Add three drops of an essential oil and spray on after showering.
SkinGlycerin moisturises and helps skin cells mature. This does not mean it helps you age, rather it means healthy and mature cells are important for people with conditions like psoriasis. Glycerin accelerates the healing process, reduces bruising and promotes tissues and cells to repair themselves.
Whip it up: Mix one part glycerin, one part honey and two parts water or milk. Add oatmeal to get a thick texture and apply on the face. Rinse off after 20 minutes. A word of caution before you start overdosing on glycerin: in dry, non-humid climates, undiluted glycerin will pull out moisture from your skin and hair, resulting in blistered skin and a brittle mane. Dilute glycerin and use it along with jojoba oil in such conditions.
Ref: Health Magazine