To diet or not to diet, that is the question.
A leading nutritionist from Oxford University has waded into a debate on the affects of yo-yo dieting.
Professor of diet and population health at Oxford University Susan Jebb has pointed out it is better to try and lose weight than do nothing.
She said: "I agree with the notion that losing weight is generally worthwhile, even if you put the weight back on again.
"We have good evidence from long-term follow up studies after controlled intervention studies in humans that there is a benefit."
US biostatistician Dr David Allison found that repeated crash diets did no harm to obese mice.
In fact, serial dieting animals lived longer than those that remained obese.
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