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• Dieters took photos as well as keeping weekly food and exercise diaries
• Almost three-quarters of dieters reached their target weight in 16 weeks
• Method meant people could submit their results rather than attend classes

Staying motivated to cut out treats and keep on exercising can be the trickiest part of dieting.

But now scientists think they have found the best way for slimmers to stay driven and reach their target weight is by taking photographs.
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