Olive oil may help protect against type 2 diabetes, review finds

Key Points:

• A new review indicates that the type of dietary fat influences type 2 diabetes risk, with saturated fats rich in palmitic acid impairing insulin response, while monounsaturated fats rich in oleic acid may protect against insulin resistance.
• Palmitic acid, found in meats, dairy, palm oil, and processed foods, promotes inflammation and cellular stress that hinder insulin action, increasing diabetes risk; oleic acid, abundant in olive oil and nuts, counters these effects by reducing inflammation and preserving mitochondrial function.
• The findings support dietary recommendations favoring unsaturated fats over saturated fats, endorsing Mediterranean-style diets rich in olive oil, nuts, seeds, fruits, and vegetables to improve metabolic health and lower diabetes risk.
• Study limitations include reliance on cell and animal studies, self-reported dietary data, and the complexity of mixed fatty acid intake in real diets, highlighting the need for further human intervention research to clarify specific fatty acid roles.
• Experts advise replacing saturated fat sources with heart-healthy fats and maintaining healthy body weight, physical activity, and overall balanced diets as key strategies to prevent insulin resistance and type 2 diabetes.