Well, one of the outcomes is that the diet industry gets fat, while you will probably remain the same size. Click here for a BBC article about the diet industry banking on failure.

For most people, dieting leads to increased attention to food, thinking about it all the time. This results in cravings. Dr Andrew Hill of the University of Leeds shows this in his research . He also showed that when you restrict access to a particular food, the cravings for that food increases. So if you are on the yo-yo of Diet Deny and Deprive and banning a favourite food from your diet, you will think about that food more and more. And then you will violate your diet, and pig out. Having done that, you then beat yourself up as a failure, decide you are past caring and get straight back to your old ways of eating so any weight loss is regained.

An alternative is to be a bit more forgiving. Work out what your eating problem is. People who manage their mood by eating tend to overeat and stuff themselves. There are people who have to eat food if they see it, but if they don't see it (or smell it, or talk about it) then they are fine. There are people who have got into a habit of eating a chocolate bar at 3 in the afternoon. Most of us know what our bad eating habits are. Knowing what they are helps you to decide what action to take.

If you have low moods, then what might you do to make yourself feel better. If you eat it if you see it, don't fill your cupboards with food that just has to be eaten. Don't walk by the cake shop on your way to work.

Whatever you do, avoid Diet, Deny and Deprive. It only makes you unhappy.