What effect does glycerin have when used in hair products?

Glycerin is a highly effective humectant, which means that one of its primary functions in hair products is to attract moisture from the environment into the hair. This attribute makes glycerin an excellent ingredient for hydrating hair and maintaining its moisture levels. By drawing moisture into the hair strands, glycerin helps to keep the hair soft, manageable, and less prone to dryness and breakage. This property is particularly beneficial for maintaining healthy hair in various climatic conditions, as it ensures that hydration stays locked in.

Moreover, while glycerin may indirectly support hair health by providing moisture, it does not serve to add fragrance, thicken hair, or prevent hair loss as primary functions. Thus, its role as a moisturizer is what truly distinguishes glycerin in hair care formulations.