This is a very simple, yet effective! Based on the facts that hair grows the fastest with heat. My sister and I use this a couple times a week cause we're obsessed with long hair after cutting ours so short...I'm talking about Justin Bieber short. Anyways! Studies show that HEAT = BLOOD FLOW = HAIR GROWTH. The more heat you add to your scalp, the faster your hair grows. That's why our hair grows faster in the Summer than in Winter...MIND BLOWING?! Not enough science? This might be "T.M.I"…