Some men with prostate cancer should be offered "surveillance" rather than treatment, according to new guidance from the National Institute for Health and Care Excellence (Nice).
Doctors treating sufferers deemed to have "intermediate" or "low" risk prostate cancer should consider offering monitoring rather than radical surgery or radiotherapy, the guidance says.
According to Nice, prostate cancer can be "slow growing" and many men will have cancer that will not cause them any harm in their lifetime.
Meanwhile treatment options, including surgery and radiotherapy, can have "serious side effects", such as erectile dysfunction and fertility and continence problems.
Prostate Cancer UK has said more complex research needs to take place so the link between omega-3 and the risk of prostate cancer can be fully understood.
However Dr Iain Frame said further research needed to take place before any conclusions were reached:
Although this report claims to add to existing research which has indicated that a diet rich in this nutrient can also be associated with an increased risk of developing prostate cancer, much larger and more complex studies will need to take place before we will fully understand how the risks of a diet high in omega-3 balance against those benefits.
Therefore we would not encourage any man to change their diet as a result of this study, but to speak to their doctor if they have any concerns about prostate cancer."
Omega 3 fatty acids could increase the risk of high-grade prostate cancer by 71 per cent, according to a new study.
Scientists confirmed that omega-3 fatty acids "play a role in prostate cancer occurrence".
It was found that men with the highest levels of omega-3 fatty acids were significantly more likely to be diagnosed with prostate cancer than those with lower levels.
High blood concentrations of all three omega-3 fatty acids, commonly found in supplements EPA, DPA and DHA, were linked to the findings.
People have previously taken omega-3 supplements to protect against heart attacks and strokes, cope with arthritis, boost concentration levels and prevent behavioural disorders in children.
Omega-3 fatty acids, taken by millions of people as a health supplement, could trigger aggressive prostate cancer, a study claims.
Research has shown the substance could increase the risk of high-grade disease by 71%.
Taking omega-3 was also associated with a 44% greater chance of developing low-grade prostate cancer. Overall, the fatty acids raised the risk of all prostate cancers by 43%.
Writing in the online edition of the Journal of the National Cancer Institute scientists said people considering increasing their intake of omega-3 "should consider its potential risks".
Emmerdale actress Gemma Oaten and her family came into the Calendar studio to talk about how her father, Dennis, survived prostate cancer.
During Calendar, the family watched our film about Lynne Cramphorn, whose husband, West Yorkshire's Chief Constable Colin Cramphorn, died from prostate cancer.
Dennis Oaten told Christine and John how too many men think "it will never happen to you". It was only at the insistence of his wife, Marg, that he finally went to the doctor.
And Gemma will be appearing on Daybreak, as part of ITV's Stand By Your Man prostate cancer campaign, tomorrow morning.
To find out how you can pledge your support for our campaign here
Meet our prostate cancer blogger Patrick. He's had first hand experience of the condition, and speaks to us candidly about his fight.Read the full story ›
A new film with an all-star cast is aiming to raise awareness of prostate cancer by telling the story of a cancer support group.
The inspiration behind the film comes from members of a real support group - one of many across the country - who meet in north London to speak about their experiences.
Between them they hope to encourage more men to talk openly about a disease that one in eight of all men will be diagnosed with at some point in their lives.
ITV News correspondent Lewis Vaughan Jones went to meet them:
Someone who has experienced the shock of being diagnosed with prostate cancer is the former Newcastle United chairman and the man behind the Metro Centre, businessman Sir John Hall.
Sir John spoke candidly to ITV News Tyne Tees at his family's estate about how he is coping with life as a cancer patient, the strength he gets from his wife Lady Mae and the importance of an early diagnosis.
Watch the full interview with Pam Royle here:
For more information visit Prostate Cancer UK.
In the run-up to Father's Day, ITV is running a campaign with charity Prostate Cancer UK to raise awareness of the disease, which kills at least one man every hour.
Bill Arthur was diagnosed with prostate cancer after a routine medical examination.
The 56-year-old, who lives in Newark in Nottinghamshire, had shown no symptoms and thought he was fit and healthy.
Bill, who works as a Rugby League presenter, is now undergoing a two year treatment plan.
He wants to use his story to encourage more men to go to the doctors and be tested.