She said she was waiting for some supplement to show up.
If she is "older" or has underlying health issues, this stuff can make you seriously ill. She needs to seek medical attention and not sit around waiting for some "supplement."
I sent her the EVMS protocol
https://www.evms.edu/media/evms_public/departments/internal_medicine/EVMS_Critical_Care_COVID-19_Protocol.pdf
Everyone should get a home health pulse oximeter and use it to determine when to seek help! The hypoxia from this disease is silent.