Most people who have tried to diet will tell you that losing weight is a tough business. The main reason people find it so hard to resist that extra slice of pizza of chocolate cake is because hundreds of thousands of years ago our brains were evolving in a time when food was scarce – our brains evolved to tell us that we needed to eat high calorie food as often as we could. However, the problem now is that we obviously do not live in a world where high calorie food is scarce. In fact, we live in a world where high calorie food is hugely abundant and easily available, and our brains have evolved to tell us to eat as much as possible (because it doesn’t know that the next meal is just around the corner!)
In 1999 a bunch of scientists discovered one of the main causes for us feeling hungry – a hormone called “ghrelin”.
This hormone is released by cells in the walls of our stomach. It then travels through in our blood to the brain, where the part of the brain monitoring hunger detects it. Once detected, it tells our body that we must eat.
The interesting thing about ghrelin is that the stomach only releases it when the stomach is empty. It knows when our stomach is empty because the walls of the stomach are not stretched. If they are stretched (i.e. we are full) then the hormone is not released.
Pretty straightward so far isn’t it – a stretched stomach wall means you don’t feel hungry. Not too taxing…
Now let’s look at an every day situation. At lunchtimes say you have a drink of water and a sandwich. This will probably keep you from feeling hungry for a couple of hours, but no more.
Something funny happens when you blend the water with the food, i.e. you make soup – you end up feeling fuller for longer. How can this be when you have consumed the same amount of food?
The reason for this strange phenomenon is because of the way that your stomach handles water and food. When you drink water, this is passed through the stomach quite quickly, so it won’t fill you up very long. However, food is held back for longer so it can be digested. But, if you mix the water with the food the whole lot is held back – meaning a stretched stomach for longer, meaning no ghrelin is produced and therefore you feel full for longer!
Very simple. Very effective. Eating soup at lunchtimes will help you lose weight because it will hold off those mid afternoon cravings!
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