Charcoal-based toothpastes - which claim to help whiten teeth - could actually increase the risk of tooth decay and staining, a review published in the British Dental Journal has found. According to the review, charcoal-based toothpastes often contain little or no fluoride to help protect teeth and the claims they make about whitening are not supported by any evidence. Furthermore, excessive brushing with them can actually do more harm than good because they are often more abrasive than regular toothpastes and can cause damage to tooth enamel and gums. The authors of the paper say people should stick to brushing with a regular fluoride toothpaste and consult their dentist about teeth bleaching/whitening. Speaking about the review, Prof Damien Walmsley, from the British Dental Association, said: “Charcoal-based toothpastes offer no silver bullets for anyone seeking a perfect smile, and come with real risks attached. “So don't believe the hype. Anyone concerned about staining or discoloured teeth that can't be shifted by a change in diet, or improvements to their oral hygiene, should see their dentist.” The bottom line, according to study co-author Dr Joseph Greenwall-Cohen, from the University of Manchester Dental School, is that charcoal-based toothpastes do not provide “a low cost, quick-fix, tooth-whitening option.”
While many people will be using the start of the New Year to kick-start certain lifestyle changes in an attempt to become “healthier”, there are some who might think it’s too late based on their age. However, a new study has revealed that it’s often not too late for many who want to improve their fitness. In fact, with exercise, even individuals who are into their late middle age can reduce or even reverse the risk of heart failure caused by years of sedentary living. But there’s a slight catch – it requires at least two years of aerobic exercise four to five days a week. According to the study, which was published in the journal Circulation, individuals aged 45-64 who followed an aerobic exercise routine for two years showed an 18% improvement in their maximum oxygen intake while exercising and a more than 25% improvement in "plasticity" in the left ventricular muscle of the heart, compared to their counterparts who didn’t follow such an exercise regime. The take-home message of the research is that exercise needs to be part of a person’s daily routine, like teeth brushing. Dr Richard Siow, vice-dean for the faculty of life sciences and medicine at King's College London, said: "I think that's a very important take-home message for those of us who may have a doom and gloom view there's nothing we can do about it. Yes there is, we can start by getting off the couch to have a more active lifestyle."