Coffee has secret trick to stop sleep

A cup of coffee in the evening may be keeping you awake for more reasons than you realise, scientists say.

Their study, showed caffeine was more than just a stimulant and actually slowed down the body's internal clock.

A double espresso three hours before bedtime delayed the production of the sleep hormone melatonin by about 40 minutes, making it harder to nod off.

Experts said our own actions had a huge influence on sleep and the body clock.

U.S. fast-food meat still mostly raised on antibiotics

many companies have not been able to curb U.S. fast-food chains, because it  still serves meat from farm animals that have been routinely fed antibiotics, consumer groups said in anew report.

Subway, Starbucks, KFC and Domino's Pizza were among the industry leaders graded "F" for their antibiotic policies in the report from consumer and health groups, titled "Chain Reaction," Reuters said.

The groups based their grades on public statements, survey responses and correspondence with individual chains. As a result, companies given failing grades were not immediately able to comment.

Daily Dose: Vitamin K

Most of us take the clotting of our blood for granted, but few of us think about how the things we eat support our blood health. Vitamin K plays a key role in making sure your blood clots properly. Here’s what you need to know.

Why does my body need vitamin K?

When you get a cut or a scrape, you’ve probably noticed that the area starts bleeding, but eventually clots over to form a scab. There are a number of factors in the blood that allow this clotting process to occur at the right time in the right place. The liver uses vitamin K as part of the process of making these factors. That makes vitamin K vitally important in how well your blood clots. It’s also why some blood thinners, like warfarin, block vitamin K’s ability to help the liver make these clotting factors.

Aspirin 'might boost cancer therapy

Aspirin may be able to boost the effectiveness of cutting-edge cancer medicines that bolster the immune system, scientists say.

Immunotherapy lets the body's own defenses fight cancer and has been a source of huge excitement in the field.

And now scientists at the have a study suggesting aspirin may prevent tumours from hiding from the immune system.

The team showed that skin, breast and bowel cancer cells were producing high levels of a chemical, called prostaglandin E2 that could dampen down the immune response - effectively letting a tumour hide.

Drinking water doesn't prevent a hangover, study says

Drinking plenty of water after a long night of drinking alcohol won’t improve your sore head, Dutch research suggests.

The only way to prevent a hangover is to drink less alcohol.

More than 800 students were asked how they tried to relieve hangover symptoms, but neither food nor water was found to have any positive effect.

54% Dutch students ate fatty food and heavy breakfasts after drinking alcohol, in the hope of staving off a hangover.