If you want to lose unhealthy and dangerous visceral fat, a green Mediterranean diet might be best. In a new study published in the journal BMC Medicine, researchers in Israel studied almost 300 people for 18 months. They compared the effects of a standard healthy diet, the Mediterranean diet, and the green Mediterranean diet with less red meat and additional walnuts, green tea and a green drink each day. The green Mediterranean diet reduced visceral fat 14 percent, significantly more than the other two diets. Visceral fat is the fat that collects between and around our internal organs. It has a close association to cardiovascular disease, diabetes, dementia and premature death.