This time of year many of us resolve to get back into shape. But if you are having trouble fitting into your tight jeans, it may not be your fault. Scientists now believe that willpower alone is not enough lose weight. They say success depends on your genes1, hormones2 and psychology3.
A study of 75 people by BBC Science and Oxford4 and Cambridge Universities has looked into why one-size-fits-all diets are often not successful. The scientists divided over-eaters into three groups – people who feast, people who constantly crave5 food and emotional eaters. They tailored diets to the needs of each group.
Feasters can't stop eating once they start. This is because they don't have the hormones that tell them when they are full. Scientists designed a diet for this group featuring high protein foods that make them feel full for a long time. This included fish, chicken, basmati rice and grains. Bread and potatoes were not allowed because they do not fill you up for long.
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