Instead, people are just as likely to maintain gym habits or eat healthily.

BBC: People under stress stick to habits, good or bad

The "Move Your Butt" will target youngsters in school canteens in a bid to promote healthier lifestyles, advising children on how to eat healthily in and out of school.

BBC: Children 'breakfast on junk food'

The research, and the six categories, are primarily designed to help health professionals encourage people to eat healthily - by identifying what kind of attitudes a family has, it's believed advice can be better targeted.

BBC: What kind of food-family are you?

Even in countries lucky enough to enjoy adequate and constant food supplies, the ability and motivation to eat healthily is compromised by a lack of agreement about what is and what is not good for us.

ECONOMIST: Food in history

It tries to persuade local people to grow their own food and eat more healthily.

BBC: Making a bee-line for city roofs

The authority also said there had also been progress in efforts to stop people smoking, to get them to exercise more and eat more healthily.

BBC: Health bosses say some heart waiting lists have decreased

On the road, Mr. Carmellini tries to eat as healthily as he can, steering clear of soda and candy bars, and snacking on nuts as he drives.

WSJ: A Chef's Road-Trip Adventures

Dr McPherson also said women should be encouraged and helped to eat and exercise healthily.

BBC: Women aim to have the perfect body