The DASH diet - Dietary Approaches to Stop Hypertension - is often promoted as healthy. But it's mostly a very conventional low-fat diet, including lots of fruit and vegetables and low-fat (yuk) dairy.
Interestingly a new study tested a higher fat version of the DASH diet - including full fat dairy. More total fat and less carbohydrates. And what happened? It turned out to be an improvement, resulting in better health markers in participants. Surprise, surprise, to all who still fear fat.
Science Daily: Higher Fat Variation of DASH Diet Lowers Blood Pressure, Triglycerides, Study Shows AJCN: Comparison of the DASH (Dietary Approaches to Stop Hypertension) Diet and a Higher-Fat Dash Diet on Blood Pressure and Lipids and Lipoproteins