Breaking News

Ringing in the ears plagues nearly one in 10 U.S. adults

About 10 percent of U.S. adults have a sensation of ringing in their ears, and the noise in their daily lives may be to blame, according to a new study.

People who experience the annoying condition, known as tinnitus, are not alone, said researcher Dr. Harrison Lin from the University of California, Irvine, according to Reuters.

Lin and his colleagues write in JAMA Otolaryngology-Head and Neck Surgery that tinnitus can cause impairment if it is persistent and bothersome.

Could artificial sweeteners make people more hungry?

Artificial sweeteners can boost appetite by activating hunger pathways in the body, scientists have found in animals.

In fruit flies and mice, the mismatch between sweet taste and fewer calories sends the body into "feed me" mode, the journal Cell Metabolism reports.

But UK nutritionists say this does not mean the same is true in humans, according to BBC.

They say low calorie sweetened foods can help people keep weight off and are better for our teeth than sugar.

The researchers, however, say more work is needed to make sure that the billions of people who regularly consume sugar substitutes don't have the same reaction as they saw in their animal tests.

Action spectrum of sun skin damage documented

Scientists have documented for the first time the DNA damage which can occur to skin across the full range of ultraviolet radiation from the sun providing an invaluable tool for sun-protection and the manufacturers of sunscreen.

Testing on human skin cell lines, this study documents the action spectrum of ultraviolet damage in cells derived from both the upper layer (dermis) and lower layer (epidermis) of the skin.

This will allow manufacturers of sunscreen to develop and test products so that they can provide protection to both layers.

Our skin ages due to the constant exposure to sunlight as ultraviolet radiation comprising UVA and UVB rays from the sun penetrates cells and increases the number of damaging free radicals, especially the reactive oxygen species. Too many reactive oxygen species can be harmful because they can damage the DNA within our cells.

Unusual US Zika virus case baffles experts

Experts are trying to work out exactly how a US carer has caught Zika after tending to a dying elderly man with the virus.

Until now it was thought that only mosquitoes and sex spread Zika, as well as the risk of mother-to-child transmission in the womb.

The carer, from Utah, did not have any of these known risk factors, according to BBC.

US officials say they are monitoring the situation carefully and carrying out more tests.

Is artificial lighting making us sick? New evidence in mice

Along with eating right and exercising, people should consider adding another healthy habit to their list: turning out the lights. That's according to a new study showing many negative health consequences for mice kept under conditions of constant light for a period of months.

"Our study shows that the environmental light-dark cycle is important for health," says Johanna Meijer of Leiden. "We showed that the absence of environmental rhythms leads to severe disruption of a wide variety of health parameters."