Further evidence has emerged to suggest that omega-3 fatty acid found in fish oil improves insulin function in overweight people who are vulnerable to type 2 diabetes. Daily supplements of DHA (docosahexaenoic) over a three-month period yielded a "clinically significant" improvement in insulin sensitivity in overweight participants in a study, reported Dr Yvonne Denkins, nutrition researcher at the Pennington Biomedical Research Institute, Louisiana State University in Baton Rouge.