Glycerin is a humectant, which is a substance that promotes the retention of moisture. There is so much water in the atmosphere that studies have shown that the humectant attracts the moisture into the skin and keeps the skin moisturized and nourished. Glycerin is non toxic so it can be used for skin, face and babies. Glycerin has been shown to provide a protective barrier, help the skin cells mature properly and aid in bruised or swollen skin. Organic glycerin is best because you can be assured that the starting material to make it is an organic oil like palm oil.