The aim of the study is to investigate the effects of non-alcoholic beer in patients with type 2 diabetes. Subjects will be divided into two groups: the control group, where participants will be consuming a bottle of water (330ml) every day for 12 weeks, and the intervention group, where participants will be consuming a bottle of non-alcoholic beer (330ml) for the same period.

This is a parallel, controlled randomized trial. The study will compare the effect of non-alcoholic beer consumption with water, in patients with type 2 diabetes.

All patients from both groups will receive a personalized nutritional intervention and will be followed throughout the study by a certified nutritionist.

Inclusion Criteria:

• Men and women diagnosed with type 2 diabetes mellitus, according to the American Diabetes Association criteria;
• Ages 40-80 years;
• Non-smoker;
• Willing and able to provide written informed consent.

Exclusion Criteria:

• Changes in oral glycaemic-control medications in the last 3 months;
• Subjects with HbA1c levels under 6.4% or above 10%;
• Subjects under insulinotherapy;
• Subjects with triglycerides levels above 4.52 nmol/L(400 mg/dL);
• Intake of antibiotics in the last 12 weeks;
• Subjects not willing to avoid drinking beer during the study;
• Subjects with a diagnosis of any digestive disease including functional bowel disorders such as IBS;
• Pregnant women or women planning to become pregnant during the study.