Those of you who are saying you have trouble keeping the weight off... have you ever considered that you might have an underactive thyroid? NHS doctors rarely diagnose it as your test results can come back perfectly "normal" - basically because your thyroid gland is trying its absolute hardest to compensate! And as a result you feel tired, put on weight, and generally have a rubbish metabolism.
This is what I've got and as soon as I got diagnosed (I had to go to a private doctor, but he was great, if expensive!!), I felt miles better. I didn't even realise that the reason I had been putting on weight was down to my underactive thyroid, or "hypothyroid", and I lost a few pounds without even doing anything! But the main thing is that I had gained loads more confidence and stopped being so depressed.
Wow, erm... I do go on a bit!! I don't mean to preach or anything, but some doctors reckon thyroid disease is as common as 1 in 4 people, and more amongst women. They also reckon that most of the women who can't lose weight or can't keep the weight off are suffering from it.
Thyroid UK is a good website, it lists the symptoms of the disease. If you have a lot of the symptoms it's really worth getting it checked out, and always ask to see your test results!! As if your TSH, FT3 and FT4 (feel free to ignore the terminology

) are in the bottom third of the range, it's highly possible you have an underactive thyroid.
Okaaaaay I'm going to shut up now, lol!! I didn't mean to launch into such a rant! It is related to weight loss, honest!