Inclusion Criteria:  Age ≥ 18 years old Patient sex - male and female Diagnosis with indolent lymphoma in low-grade lymphoma (follicular lymphoma (FL), marginal zone lymphoma MZL), as assessed by Groupe d'Etude des Lymphomes Folliculaires (GELF) criteria Lack of need and non treatable patients at the time of diagnosis Existence of detailed medical information about physical activity and dietary habits Patients who have signed an informed consent form to participate in the study.  Exclusion Criteria:  Need for therapeutic intervention Administration of chemotherapy and / or monoclonal antibodies or immunomodulatory preparation Chronic inflammatory or infectious disease Another malignant disease Pregnant women, special populations - children and incapacitated of judgment