Now there s a formula that combines two of nature s most effective diet aids to minimize the impact of dietary carbs and fats. Swanson Diet Duo is a revolutionary formula that combines two research-backed ingredients: the fat-binding power of LipoSan ULTRA chitosan and the carb-control capabilities of Phase 2 starch blocker. LipoSan ULTRA chitosan is a fiber supplement that promotes healthy weight management when combined with a healthy diet and exercise plan. While other chitosan products take up to two hours to work powerful LipoSan ULTRA goes to work right away binding the fats in your diet before they bind to you. As a dietary fiber it may also contribute to a healthy gut microbiome. Designed to reduce absorption of carbohydrates Phase 2 is a standardized white kidney bean extract that also contributes to healthy weight management when combined with a healthy diet and exercise plan.