High-fat, low-carb ketogenic diets are controversial, but a new study in mice suggests they really may work to improve health in some special cases – especially when combined with exercise. The researchers behind the study, from institutions across the US, found that when mice with high blood sugar (hyperglycemia) were put on a strict and extreme keto diet, their blood sugar levels returned to normal. What's more, when these mice exercised after eight weeks on the diet, their activity seemed to