Poor air quality cuts a year off our lives—although that is a general and global figure, and it's shortening the lives of those in polluted Asian areas far more dramatically than it is in North America or Europe, where there are stricter controls.

Image credit: https://www.carbonclick.com/solutions/aviation1

So, using a dye that includes melanin can produce the same results and without the health risks, say researchers at Northwestern University.

Just 30 minutes of some physical activity—instead of sitting—every day can halve the rate of premature deaths from heart disease and cancer, another research group has found.

Androgen-targeted therapy (ATT) is routinely used on the most common type of prostate cancer, adenocarcinoma, in its early stage. It targets androgens, the male sex hormones that can stimulate tumor growth—but sometimes the hormones become resistant to ATT and are transformed into a more dangerous type, neuroendocrine cancer cells.

We can accumulate toxins by ingesting or inhaling chemicals from household cleaners, beauty products, air pollution, pesticides, heavy metals and even additives in our food.

Those with the strongest life purpose were more than twice as likely to live longer than someone whose life was aimless and was about day-to-day survival. They were also less likely to be suffering from a chronic health problem. A positive outlook seems to keep inflammation in check, as well as life-threatening problems such as cancer and heart disease, the researchers say.

It's a bigger killer than cancer and heart disease combined—and it seems to be an unrecognised cause of heart disease, and could also be a trigger for cancer, say researchers from the American Cancer Society.

As CT radiation doesn't damage DNA, radiologists have been told the technology is safe—but instead the scans alter healthy cells and make them 'cancer-capable', which means they make cancer more possible.

People who do eat plenty of fruit and vegetables, or take supplements, have a 17 percent reduced risk of developing cutaneous squamous cell carcinoma, the second most common form of skin cancer.

The 'sunshine vitamin' plays a key part in preventing colon cancer and blood cancers, including leukaemia and lymphoma, and can also slow the progress of breast and prostate cancers.

The secret seems to be getting through 'the perilous 90s', researchers from the University of California at Berkeley discovered when they tracked the lives of around 4,000 Italians who had reached the age of 105.

Researchers have discovered that how they combine unhealthy food options on the same plate plays as big a part in setting their risk of illness as the food choices they make.

The idea is to eat at least 350 grams of fish a week, which is around one-and-a-half cups—and it should be a fatty fish, such as herring or mackerel, or a mix with leaner cuts such as plaice and pollock. But don't make tuna your first choice; it's low in the fatty acids we need, and it can also have high concentrations of methylmercury.

The painkiller increases the risk of major, life-threatening bleeding by nearly 50 per cent, and yet has only a marginal protective effect against heart disease.

It's a key vitamin that has anti-cancer properties, and it's also been linked to a range of other cancers, including colon, bladder, prostate and colorectal.