Diabetes is associated with reduced immunity and recurrent infections. The immune systems of people with diabetes have lower levels of the antimicrobial peptide psoriasin, which attacks the cell barrier of the urinary bladder, increasing the risk of urinary tract infections, according to researchers at Karolinska Institutet in Sweden. The findings of the study have been published in Nature Communications. Diabetes is the result of a lack of insulin and/or a reduced function of insulin. Insulin is a hormone that regulates glucose (sugar) and thus energy to the cells. In type 1 diabetes, the body stops producing insulin, while in type 2 diabetes, the cells have become less sensitive to insulin, contributing to high blood glucose levels. Diabetes is a common disease that affects health in many ways.