Intake of Nitrate-rich Vegetables and Their Effect on Inflammatory Molecules and Oral Microbiota of Patients With Periodontitis

Inclusion Criteria: * Men and/or women from 30 to 65 years old * Voluntary participation and signing the written informed consent * Not receiving nutritional treatment at the time of uptake * Availability to attend all scheduled visits * Have an indication to receive nonsurgical periodontal treatment (NSPT) * Interdental clinical insertion loss ≥3mm and ≥5mm in the buccal or oral area of two or more non-adjacent teeth * Detectable depths ≥ 5mm in two or more teeth * Radiographic evidence of periodontal bone loss Exclusion Criteria: * Trauma-Induced Gingival Recessions * Cervical caries * History of bleeding diathesis * Pregnant or nursing women * BMI \<18.5 kg / m2 * History of any of the following self-reported diseases: type 2 diabetes mellitus, high blood pressure, kidney or liver disease, inflammatory bowel diseases, autoimmune diseases and/ or use of medications to control these diseases. * Having or presenting a high risk of infection by tuberculosis, hepatitis B or Human Immunodeficiency Virus (HIV) * Use of antibiotics (including antibiotic oral rinse) 6 months prior to or during the study * Having received specialized periodontal treatment in the previous 6 months. * Smoking habit * Require an interpreter or not understand Spanish to attend or provide written material.