Charcoal toothpastes 'don't whiten teeth'

Charcoal-based toothpastes, which claim to whiten teeth, are a "marketing gimmick" which could increase the risk of tooth decay and staining, says a review in the British Dental Journal.

The charcoal products, which are increasingly popular, often contain no fluoride to help protect the teeth, according to BBC.

And there is no scientific evidence to back up the claims they make, the authors say.

Coffee is NOT bad for your heart (if you drink fewer than 6 a day)

To anyone that can stomach six cups of coffee a day, new research suggests that's not a good idea.

A study by the University of South Australia found drinking more than six cups a day increased the risk of heart disease by 22 percent.

The findings, likely, won't have much of an impact on most of us , according to Daily Mail.

But the research digs into a debate about the threshold before caffeine becomes dangerous, after a spate of deaths linked to extremely high caffeine intake, and research that suggested six cups could be protective for your heart.

Social media effect 'tiny' in teenagers, large study finds

The effects of social media use on teenage life satisfaction are limited and probably "tiny", a study of 12,000 UK adolescents suggests.

Family, friends and school life all had a greater impact on wellbeing, says the University of Oxford research team.
It claims its study is more in-depth and robust than previous ones, according to BBC.
And it urged companies to release data on how people use social media in order to understand more about the impact of technology on young people's lives.
The study, attempts to answer the question of whether teenagers who use social media more than average have lower life satisfaction, or whether adolescents with lower life satisfaction use more social media.

Obesity: How to help your child eat healthily

Across the world, record numbers of children are obese - but one city appears to have bucked the trend.

Figures presented at an obesity conference suggest Leeds in UK has managed to reduce child obesity rates by 6.4% over recent years.

A key part of the city's strategy for tackling obesity was a focus on pre-school children and offering parents classes in how to encourage their children to be healthy.

But it's not always easy for parents and carers to know how to approach the subject of food. So what are the best things they can do?

Staying fit lowers your risk of lung cancer AND slashes your odds of dying from bowel cancer

Staying fit reduces your risk of both dying from cancer and getting the disease in the first place, research suggests.

In the largest study of its kind, researchers found being active slashes your odds of developing lung cancer by 77 per cent.

And those with bowel cancer reduce their risk of dying from it by an astonishing 89 per cent if they exercise regularly, the research added.

Being active has been shown to boost the health of the heart, lung and immune system health, which may lower the risk of cancer, the scientists believe, according to Daily Mail.

Regular exercise also reduces inflammation in the body, which could trigger some forms of the disease.