Walnut-rich, higher fat diet shows comparable weight loss to a low-fat, higher carbohydrate diet 21.02.2016 20:14 «The Times of India» (indiatimes.com) A new study published in the Journal of the American Heart Association found that a diet containing unsaturated fats, such as those found in walnuts and olive oil, has similar weight loss effects as a lower fat, higher-carbohydrate diet.