A glass of red wine a day can improve cardiac health and help manage cholesterol for patients with type 2 diabetes, according to findings in a 2-year study published in the journal Annals of Internal Medicine. Red wine can help people with type 2 diabetes to avoid heart disease. Moderate alcohol consumption has been linked to improved cardiovascular and total mortality rates, and a glass of red wine a day as part of a healthy diet has been considered beneficial for some time.