A root boost for fine hair is a hair styling product designed to give the illusion of thicker, fuller hair by lifting the hair at the roots. It is typically applied to damp or dry hair, and can be used with a blow dryer or other styling tools to create volume and lift.
Root boosts for fine hair can be beneficial for people who want to add volume to their hair without using heavy styling products that can weigh the hair down. They can also be helpful for people who have fine or thin hair, as they can help to create the appearance of thicker, fuller hair.