An 83-year-old man has become the oldest person in the UK to donate a kidney while still being alive, the NHS Blood and Transplant service has said.

Nicholas Crace, from Overton in Hampshire, is also the oldest "altruistic" kidney donor - he will never meet the recipient of his organ.

Just one in five Britons eats the recommended five portions of fruit and vegetables a day, a poll for World Cancer Research Fund (WCRF) suggests.

The Department of Health first launched its five-a-day campaign in 2003.

Being cheerful may protect against heart problems, say US experts.

Happy, optimistic people have a lower risk of heart disease and stroke, a Harvard School of Public Health review of more than 200 studies - reported in

Teenagers can suffer severe sleep deprivation when the clocks change, say researchers at the University of Surrey.

The amount they sleep decreases to less than six hours a night on average the week following the move to British Summer Time.

Are you feeling virtuous about your healthy breakfast of wholegrain cereal washed down with a glass of orange juice?

After all, it’s better than an artery-clogging fry-up. In terms of fat, at least.

Many medical implants are vulnerable to attacks that could threaten their users' lives, according to studies.

Security researchers have developed attacks that locate and compromise implants used to manage conditions such as diabetes and heart disease.

This is the 19-year-old girl who has eaten nothing but Margherita pizza for the past eight years.

Sophie Ray, from Wrexham, Wales, has not had a proper meal since she was two, and from the age of 11 she has subsisted solely on cheese and tomato pizza.

For chocolate-lovers feeling guilty about their indulgence it is the best kind of news – eating more can help keep you thinner.

Although chocolate contains more calories than many other foods, those who eat it regularly have less body fat than those who don’t, a study shows.

Children as young as 10 are more familiar with some alcohol brands and adverts than those for popular foods and snacks, research shows.

The Alcohol Concern survey of 401 children found twice as many children recognised Carlsberg as an alcoholic brand than Mr Kipling cakes as foods.

A diet high in saturated fat has been linked with a reduced sperm count.

A study of 99 men attending a US fertility clinic found those eating junk food diets had poorer sperm quality.

Metal-on-metal total hip replacements have a much higher failure rate than other options and "should not be implanted", say researchers.

They said data from the world's largest register of hip implants provided "unequivocal evidence" of the failure rate.

Since Scotland introduced a ban on smoking in public places in 2006 there has been a 10% drop in the country's premature birth rate, say researchers.

They believe this is a smoke-free benefit that can be chalked up alongside others, like reductions in heart disease and childhood asthma.

Babies born just a few weeks early have a slightly higher risk of health problems in infancy, research suggests.

Doctors said their work challenged widely held views that babies born after 37 weeks had similar long-term outcomes to those born at full term.

The belief that older people tend to suffer worse sleep may be false - in fact the reverse may be true, according to US researchers.

A telephone survey of more than 150,000 adults suggested that, apart from a blip in your 40s, sleep quality gets better with age.

Your walking speed and the strength of your grip may help determine how likely you are to develop dementia or stroke.

According to research conducted at the Boston Medical Center, these tests can easily be conducted by a neurologist or GP on middle aged patients.

Meet Britain's new fattest woman - who weighs 40 stone and is so big that she has not left her house in four years.

Brenda Flanagan-Davies, 43, has never once sat in her taxpayer-funded living room because it takes too much effort for her to walk there from bed.

The speed someone walks may predict the likelihood of developing dementia later in life, according to researchers in the US.

They also told a conference that grip strength in middle-age was linked to the chance of a stroke.

In future years, when he's all grown up, we hope "little" Chun Chun remembers to be extra nice to his mother on her birthday, and Mother's Day, and, well, pretty

much every day of the year. Weighing in at 15.5 pounds, the boy may be the heaviest baby in the country's history.

Scientists in the US have successfully made human brain cells in the lab that are an exact replica of genetically caused Parkinson's disease.

The breakthrough means they can now see exactly how mutations in the parkin gene cause the disease in an estimated one in 10 patients with Parkinson's.

Frying itself may not be bad as long as the type of oil used for frying is good, says the British Medical Journal.

In the early 1970s, accumulating evidence showed remarkably low rates of coronary heart disease in various Mediterranean countries, where fat consumption was