Inclusion Criteria:  Type 2 diabetes diagnosed for at least 3 months. Over 18 years old. Acceptance of constraints related to participation in the study. Acceptance to participate in the constitution of a plasma library. Ability to sign informed consent. Affiliation to a social security scheme.  Exclusion Criteria:  Ongoing prandial insulin therapy Treated bacterial or viral respiratory infection in the 2 weeks preceding the meal test. Surgical intervention under general anesthesia in the last 12 weeks. Asthmatic subjects with bronchospasm or under chronic inhaled therapy. Ongoing COVID-19 (PCR +) or contact case in the isolation period. Pregnancy or breast-feeding. Participation in another clinical study or exclusion period from another research protocol. Patient under guardianship, curatorship or legal protection.