Hair tends to fall out 3 or 4 months after any big weight loss on any plan. It will come back. Do a search on this site for hair loss and you'll get info.

If you are eating soy which has plant estrogens, that may lead to breast tenderness. It also happens in perimenopause. I don't know your ages, but that (peri) can begin in your 30's.

Insulin is a master hormone which affects all sorts of systems in the body. When we alter its production by switching to ketosis and glucagon (another master hormone), it makes sense that ALL our hormone systems are involved in the adjustment. Read the Protein Power Plan book for good explanations.