Our top pick for the best overall hair growth conditioner is the Redken Extreme Length Conditioner. This formula is enriched with amino acids, citric acid, and arginine, which blend together to ward off all types of damage — including more extreme situations — while also providing an ideal environment for hair growth.

A nourishing deep conditioner will add moisture back into the hair, helping soothe frizz, repair damage, and leaving hair soft and glossy. 2. Deep Conditioning Helps Prevent Hair Breakage. Deep conditioners are essential for preventing and combating hair breakage.