The Science of Black Hair: Basics of The Hair Growth Cycle In this video, we go through the basics of hair growth cycles– what they are, and how they work. We discuss the 4 basic things you need to know about how ou… Related posts: Choosing The Best Hair Care Products For African American Hair / Black Hair! How to grow NATURAL 4C Hair?- The Science of Black Hair Review What Is In Best Hair Products For African American Black Hair Growth? Black hair growth/care regimen?