What are the best ingredients to look for in a hair mask for damaged hair?

For damaged hair, look for hair masks containing nourishing ingredients like keratin for rebuilding strength, argan oil for deep hydration, coconut oil for moisture and repair, shea butter for smoothing, and panthenol for added shine and moisture retention. Amino acids and vitamin E also help repair and protect the hair shaft, while hyaluronic acid provides extra hydration and elasticity.