MJ Week 7 - Lost 15kg (12%) so far. Is that healthy?

I'm worried that I might be losing too much weight too quickly. I've dropped 15kg total, from 127kg to 112kg (12%) in my first 7 weeks. On average losing about 2kg per week. I'm following the official regiment so I'm on 5mg right now moving to 7.5mg soon.

Since starting with MJ I'm just not hungry. When I do eat, I feel full very quickly. Some days I can't even think about food, others I do get slightly hungry and eat more.

Has anyone lost so much so quickly and what, if any, effect has it had on your health? Is it known that some people can shed weight so quickly on MJ? Does it mean I will gain the wait again more quickly when I decide to stop using? Will the weight loss slow any time soon? I'm also worried that it might be muscle loss along with the fat. Any advice?

I haven't had much side effects apart from the first week where I had diarrhoea and slight nausea. I don't feel tired at all. I do feel light headed every now and again though, on days when I haven't eaten all day. I try to get as much protein in as possible when I do eat and I take a multi vitamin every day.

I'm not complaining, the MJ is doing it's job. I'm just worried that it might have negative consequences when you are losing too quickly.