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.

It's not a bad idea to try and use moisturizing products across the board, but, at the very least, incorporate a moisturizing deep conditioner or treatment into your routine once per week, Wellman advises. A few key ingredients to seek out: Shea butter, avocado, glycerin, and aloe, all of which are deeply moisturizing.

Rich sources of Vitamin C are citrus fruits like oranges, kiwis, and vegetables like sweet potato. Vitamin D is important for healthy hair follicle production, and this promotes hair growth. Vitamin D also helps reduce stress and depression. It is found in eggs, oily fishes, and mushrooms.

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.