Fries with that just got a little more tempting. A new study in the journal Diabetologia shed light on the estimated one-third of obese adults who remain metabolically healthy despite being significantly overweight. Researchers found this under-studied group has fat tissue that generates new cells to store added fat, while fat cells in people who are obsese and unhealthy expands to a breaking point, which then leads to fat stored in organs like the liver and heart. The new research shows the cell-generating reaction to obesity means there's a healthy way to carry fat, though there is evidence it's a temporary stage and will morph into unhealthiness later.