Evaluation of the Efficacy of Respicure® (Resveratrol / Quercetin) in the Management of Respiratory Conditions Including Asthma,COPD and Long COVID.

This is an interventional, prospective, national, multicenteric, randomized, open-label, controlled clinical study comparing two arms: Control arm taking the standard of care Versus Intervention arm (standard of care + Respicure®). A total of 480 patients (160 in each group of pathology i.e Asthme, COPD and long COVID, distributed through 8 centers resulting in 20 patients/center for each group of pathology). The administration of the study product is by randomaisation.The data will be collected during 5 visits for the two arms as following: * Visit V1 on D0: inclusion, signature of informed consent and implementation of the RESPIRE DZ protocol with delivery to patients of a one-month supply of Respicure® for the intervention arm, * Intermediary visit on D15: face-to-face and/or by telephone to assess safety after the use of Respicure® for the intervention arm. * Visit V2 on D30: follow-up visit with delivery to patients of a one-month supply of Respicure® for the intervention arm, * Visit V3 on D60: follow-up visit with delivery to patients of a one-month supply of Respicure® for the intervention arm, * Visit V4 at D90:follow-up visit at the end of the use of the study product, * Visit V5 at D180: follow-up and end-of-study visit.