I don’t know what it is but I have gained an inch in new growth since my last measurement almost 3 weeks ago. Betwee the vitamins, hair oils serums and nightly scalp massages something must’ve clicked. I also changed over to liquid forms of some of my herbs. This is insane. I think I’ve finally found the cure to my 10 year drought in hair growing....finally at 16”’. The longest my hair ever got when growing up was close to shoulder length. Now I’m at below my bra strap...I’m sooo excited!!!!!!!!