Following a primal eating plan rich in meat, vegetables, berries and nuts may reduce the risk of heart disease, according to a small study published this month in the European Journal of Clinical Nutrition.
For the study, researchers at the Karolinska Institute in Sweden recruited 14 healthy volunteers to ditch their normal diet in favor of a Paleolithic diet. As such, volunteers were restricted from consuming cereals, bread, sugar, milk, butter and cheese.
Over the course of the three week study, the volunteers lost an average of 2.3 kg (roughly 5.5 lbs), reduced their waist circumference (a key indicator of abdominal adiposity as well as potential cardiovascular risk according to this Journal of the American Medical Association study) by 0.5 cm and reduced their body mass index (which, admittedly, is not an accurate indicator of health) by 0.8. In addition, systolic blood pressure was reduced by 3 mmHg and plasminogen activator inhibitor-1 (high circulating levels of which may be associated with increased heart disease risk) were reduced by 72%.