A study published in Obesity examined 101 adults with abdominal obesity and at least one other risk factor for metabolic syndrome. Participants followed isocaloric diets (50% carbohydrate, 15% protein, 35% fat) and consumed a smoothie twice daily containing one of five types of oil: canola, high oleic canola, high oleic canola with DHA, a corn and safflower oil blend, and a flax and safflower oil blend. Subjects were randomly assigned to a sequence of the five oils. Each diet was followed for four weeks, with a two- to four-week rest period between each diet, during which participants followed their usual diets. Results showed a significant decrease in abdominal fat when subjects consumed smoothies prepared with canola and high oleic canola oil (high in monounsaturated fats). Reductions in systolic and diastolic blood pressure were also associated with these oils, and decreased triglycerides were tied to high oleic canola oil.