inclusion criteria: * age 30-70 * any sex * any ethnicity * adequate cognitive function to be able to give informed consent * technologically competent to complete web forms and perform video calls with the pi * positive pcr (polymerase chain reaction) test result for sars-cov-2 (severe acute respiratory syndrome coronavirus 2) within the last 10 days * at least two covid-19 symptoms as assessed by laboratory or patient self-reporting started within the last 3 days * willing to fill out regular questionnaires * willing to take metformin and ldn

inclusion criteria: * age 30-70 * any sex * any ethnicity * adequate cognitive function to be able to give informed consent * technologically competent to complete web forms and perform video calls with the pi * positive pcr (polymerase chain reaction) test result for sars-cov-2 (severe acute respiratory syndrome coronavirus 2) within the last 10 days * at least two covid-19 symptoms as assessed by laboratory or patient self-reporting started within the last 3 days * willing to fill out regular questionnaires * willing to take metformin and ldn

inclusion criteria: - age 30-70 - any sex - any ethnicity - adequate cognitive function to be able to give informed consent - technologically competent to complete web forms and perform video calls with the pi - positive pcr (polymerase chain reaction) test result for sars-cov-2 (severe acute respiratory syndrome coronavirus 2) within the last 10 days - at least two covid-19 symptoms as assessed by laboratory or patient self-reporting started within the last 3 days - willing to fill out regular questionnaires - willing to take metformin and ldn

inclusion criteria: - age 30-70 - any sex - any ethnicity - adequate cognitive function to be able to give informed consent - technologically competent to complete web forms and perform video calls with the pi - positive pcr (polymerase chain reaction) test result for sars-cov-2 (severe acute respiratory syndrome coronavirus 2) within the last 10 days - at least two covid-19 symptoms as assessed by laboratory or patient self-reporting started within the last 3 days - willing to fill out regular questionnaires - willing to take metformin and ldn