Regular walking may protect against heart failure post menopause

Walking for at least 40 minutes several times per week at an average to fast pace is associated with a near 25 percent drop in the risk of heart failure among post-menopausal women. The benefit appears to be consistent regardless of a woman's body weight or whether she engages in other forms of exercise besides walking.

About 6.5 million adults have heart failure, a condition in which the heart becomes too weak to pump enough blood to meet the body's needs. The risk of heart failure rises with age; women 75-84 years of age are three times as likely to have heart failure compared with women 65-74 years old, according to Science Daily.

Sipping acidic fruit teas can wear away teeth

Sipping acidic drinks such as fruit teas and flavoured water can wear away teeth and damage the enamel, an investigation by scientists has shown.

The King's College London team found that drinking them between meals and savouring them for too long increased the risk of tooth erosion from acid, according to BBC.

The research, in the British Dental Journal, looked at the diets of 300 people with severe erosive tooth wear.

It said the problem was increasing as people snacked more.

Low magnesium levels make vitamin D ineffective

There is a caveat to the push for increased Vitamin D: Don't forget magnesium.

A review found Vitamin D can't be metabolized without sufficient magnesium levels, meaning Vitamin D remains stored and inactive for as many as 50 percent of people, according to Science Daily.

"People are taking Vitamin D supplements but don't realize how it gets metabolized. Without magnesium, Vitamin D is not really useful or safe," says study co-author Mohammed S. Razzaque, MBBS, PhD, a professor of pathology.

Sea swimming 'increases illness risk'

Swimming in the sea substantially increases the chance of developing stomach bugs, ear aches and other illnesses, researchers have found.

The University of Exeter Medical School and Centre for Ecology and Hydrology carried out the study, according to BBC.

It concluded, compared to non-sea swimmers, the likelihood of developing an earache increases by 77% and for a gastrointestinal illness rises by 29%.

As well as swimming, the risks also apply to water sports, such as surfing.

Red wine compound 'could help tooth decay and gum disease fight'

Red wine has previously been linked to a range of supposed health benefits, from helping the heart to lowering the risk of diabetes.

Now a new study suggests it contains chemicals that can help in the fight against tooth decay and gum disease, according to BBC.

Researchers found compounds from the drink, known as polyphenols, helped fend off harmful bacteria in the mouth.