CYW says…I always get confused about glycerin. Is it an ingredient I should use to combat my frizzy hair on hot, humid days? If so, how much can I add to my leave in conditioner so it will be affective without being sticky.
The Right Brain replies:
Glycerin is what is known as a humectant. That means it has the ability to absorb moisture from the air. This is a very helpful property in skin lotions where it can help bind moisture to the skin. However, since humidity tends to increase the frizzing of hair, binding additional moisture is the last thing you want to do. I would stay away from glycerin in a leave in conditioner to be used under high humidity.
There is one possible exception: certain types of highly textured hair which are extremely dry, may still benefit from glycerin even in high humidity.