I WONDER - What Is Hair Made Of? Me Pregunto - De Qué Está Hecho El Cabello?

The video tutorial explains that hair is primarily composed of keratin, a protein also found in skin, nails, and various animal parts. It describes the three layers of hair: the dome, crust, and medulla. Additionally, it highlights how hair growth varies with seasons due to changes in blood flow to the scalp, increasing in summer and decreasing in winter.

What new insight or understanding did you gain from this video?