I had a full head of very thick long hair and have lost about half of it. It's still coming out!!! I phased off in November due to the hair loss and am hoping it stops soon. I had a full blood work up and all my numbers are good so my doc says it's def from the diet. Also FYI, I have been taking biotin, b12 and fish oil the whole time so while I am sure that will make the new hair that grows back super healthy, it did nothing to prevent the hair loss from occuring. I am just one of the unlucky 11%! All this said, this was the best diet I have ever done for my body. I lost 41 pounds and have maintained that number since phasing off in November. While I am disappointed that I can't go on it ever again, it motivates me to stay in the 130s for life!!!!!