We also tried many hair growth conditioners and were particularly impressed with the Redken Extreme Length Conditioner, which helped improve hair growth in just three weeks, and the Nutrafol Strand Defender Lightweight Strengthening Conditioner for Thinning Hair for its impressive regrowth capabilities.

Homemade deep conditioner Mix equal parts honey and olive oil. Leave on your hair for 20 to 40 minutes. Combine one egg yolk with two tablespoons of melted coconut oil. Leave on your hair for 15 to 20 minutes.

Deep conditioners contain higher concentrations of emollient and humectant ingredients than daily conditioners, Mraz Robinson says. They're also left in the hair for much longer: 20 to 30 minutes instead of just 2 or 3 minutes. “Deep conditioners will have a thicker, heavier concentration,” Mraz Robinson says.

Deep conditioning usually comes in the form of a thick mask and is meant to stay on the hair for longer than your regular hair conditioner. A lot of deep conditioners target specific problems, such as a lack of protein from one too many chemical treatments or simply adding a hit of moisture back into your hair.