Products can't grow your hair. Hair in good condition breaks less and retains length, but it doesn't grow any faster or slower. Some EOs and herbs have been thought to stimulate the scalp, but that isn't an exact cause. Biotin can help grow stronger hair, but it does break some people out, and general diet of veggies and good fats will help with the quality of your hair. It's more of an inside out kind of thing.