This article provides an update on the dietary management of type 2 diabetes mellitus (T2DM) for community nurses. Dietary change can greatly modify the trajectory of T2DM. Weight changes are a key factor, as significant weight loss can put the condition into remission, and even less dramatic weight loss can have positive effects on glycaemic control and cardiovascular risk factors in individuals with T2DM. Protein intake supports various aspects of glycaemic management and is an especially important nutrient for older adults, who are more prone to T2DM. Carbohydrate restriction is widely advised in clinical practice, although current guidelines do not support this as the sole dietary management strategy for T2DM; it is simply one of various potentially effective measures. Carbohydrate quality is important and high fibre carbohydrates are the preferred source. Excessive alcohol intake can exacerbate T2DM via its damaging effects on the liver. Knowledge of the dietary management of T2DM is vital for community nurses, as it allows them to offer advanced and comprehensive care to their patients.