Diet not

I’ve seen a lot of adverts for diets lately; they’re designed to take advantage of the New Year motivation boost and the frustrations of having over-done things at Christmas (again). If you’ve ever lost weight on a diet, chances are you put it back on again later (possibly with a bit extra as well). Some people blame themselves for this, thinking that it’s a lack of self discipline. It isn’t true. Some believe that overweight people eat too much. That is sometimes the case but often that isn’t true either.

We’re told that all we need to do is eat less and exercise more. It sounds so plausible. As a scientist, I’m familiar with the law of energy conservation (energy in = energy out). When applied to the human body it’s more subtle and one key factor is the variability of the ‘energy out’ part of the equation. The body has a clever way of slowing down your metabolism to protect you against starvation when food is in short supply. Restrict the energy that goes in (e.g. go on a diet) and your body won’t carry on merrily burning the same amount of fuel as before, it will batten down the hatches and store everything it can.

Foods are not all the same and calories are not all equal. Some foods lead to fat storage, others boost the metabolism and promote fat burning. Limiting intake of bad foods is helpful. Limiting intake of good foods can lead to deficiencies of nutrients critical to good health. Rather than eating less of the same, many people would actually be better off if they focussed less on the amount but ate differently, ate better, ate well.

Dieting is not the answer.

Top tip – Don’t eat less, eat well!

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