Vegetable Glycerin in itself is a wonderful skin moisturiser, cleanser, toner, and a lot more.
Primarily though, it is a natural humectant which means it preserves moisture to prevent your DIY creams and lotions from drying out. In addition, it makes your products soft, smooth, and easy to apply.
Use between 2% to 5% in your homemade skincare products such as shampoo, soap, moisturisers, and conditioners.