Epigenetic markers linked to psychotherapy response in OCD - Phys.org

Could changing your diet really turn back your body's clock? Not the wrinkles on your face or the gray in your hair. The clock in question is hidden in signals carried by your blood, metabolism, and cardiovascular system. In a new study, some older adults ate differently for just four weeks – and estimates of their biological age shifted several years younger. Even more surprising, the strongest change appeared in a group eating more carbohydrates and less fat, challenging the familiar idea that carbs must always be cut. So did these people really become younger in a month? Or did the clock measure something more fleeting? The study, published in Aging Cell, offers an intriguing but cautious answer. Researchers at the University of Sydney analyzed data from 104 adults aged 65 to 75 who participated in the Nutrition for Healthy Living trial. Every meal they ate for four weeks was prepared and delivered by the researchers. Participants did not count calories and could eat as much as they wanted from the supplied menus. They were randomly assigned to four groups, meaning they did not choose which diet to follow.

A new study that tracked dogs' aging by reading tiny chemical tags on their DNA found that larger dogs aged more quickly.