Everyone is different. Here's an interesting thing. When I was in my early 30s, I climbed up a big mountain in Africa. I became friends with a girl who I had to share a room with one night. She as about 8 stone and I was about 9 1/4 stone. Every day we got up and ate the same amount of food for breakfast. Every day we walked the same distance. Every day I ate less than her because we were given a banana for lunch and I hate bananas so I gave mine away. Every night I was one of the first people to get to our bunks as I walked fast and didn't suffer from altitude sickness. When we got back to London, my weight was the same as when I had left home and my 8 stone friend had lost 1/2 stone. So how does that work? There is a an awful lot that is not known about weight loss and everybody is different