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.

Depending on the condition of your hair, you should use a deep conditioning treatment around once a week. However, if your hair feels dry and stressed, you can use them up to 2-3 times a week.

If your hair feels dry even though you use conditioner, you may not be fully washing it out, or your hair could simply be very damaged—and in that case, a haircut and giving your hair some time to grow out will help.

They typically contain active ingredients like exfoliators, nutrients, and hydrators to balance oil production and promote a balanced scalp microbiome. Many scalp treatments are designed to be applied to a dry scalp and left on, which allows the active ingredients to absorb thoroughly into the skin.