I also had a lot of hair loss that really scared me. It started at about 3 months post op and ended around 6 months. I also started off with really thick hair and I lost about half. Its just starting to thicken up again now and I'm missing my more manageable thinner hair. I actually went to see my family doctor because I was really scared I would go bald. LOL I took my vitamins and ate all the required protein. The physician explained to me that all the hairs in the dormant phase will fall out because of the stress from the surgery and the extreme diet change. He said it would peak at 4 months post op, end around 6 months post op, and that I'd be back to my full thickness 6 months after that. He was right on! He laughed that I didn't time things well, my hair will be nice and thick again by summer - LOL!!!!