As dieting mantras go, it could not be any simpler.
All you need to do to lose weight is eat less fat and do more exercise.
And the secret to successful slimming is so straightforward it has been dubbed the ‘Not Rocket Science’ diet.
The diet industry is booming, with research suggesting the average woman spends nearly £500 a year on health foods, equipment, clothing and membership fees for gyms and slimming clubs [...]
