A review published by Research gate and Drugs.com website refutes the claim that compounds found in tea can cure COVID-19.
Upon research, we found information published in Research Gate website under the headline 'Health Benefits of Methylxanthines in Cacao and Chocolate' which states that methylxanthines can improve lung function and produce bronchodilatation. Also, theophylline is mainly used for the treatment of asthma and in treatment of premature infants with apnea.
Further, information published by Drug.com states that methylxanthines, theophylline and theobromine compounds are used in the treatment of health conditions such as asthma, chronic bronchitis and emphysema. They are not effective against viral infections, as they only help maintain good airway control.
Thus, there is no evidence to support the claim that compounds found in drinking tea can cure COVID-19. It only boosts the immune system in humans.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.