Protein could be linked to mood

Scientists are trying to find out whether protein found in milk affects mood

A team of scientists are investigating whether the lack of certain proteins in your diet can lead to depression.

Researchers from Cambridge and Oxford Universities and Hammersmith Hospital in London are involved in the 14-month trial which began in April.

The team hope to discover whether the lack of tryptophan - commonly found in milk and tuna - affects moods.

The brain uses the protein to make serotonin - which is thought to be linked to depression.

Volunteers are given protein drinks - some drinks contain all the proteins found in a balanced diet while others lack tryptophan.

Appeal for volunteers

Researcher Danielle Turner, who is conducting the Cambridge trial, said: "So far some people who have had the drink missing the protein are absolutely fine but some report feeling down.

"If we discovered that it was the environment or what you ate that was the most relevant in whether you were likely to get depression then that would have huge implications for how we try to prevent the illness.

"Some 80% of people don't respond to anti-depressants anyway so there is quite a high number of people still suffering and not responding to conventional treatment," she added.

The Cambridge team currently need to hear from men between 25 and 65 who have never suffered from depression themselves but with a close family member who has.

Volunteers are asked to phone Miss Turner at Addenbrooke's Hospital in Cambridge on 01223 336010.