Often they use vitamin B12 to treat dyspnea - altitude sickness. For some people methyl B12 is way better than simple vitamin B12. Maybe the cure is methyl B12 plus lots of vitamin C, and added iron.
Taken with a nice hot cup of Kenya AA coffee for the synergistic effect
But drink Ganoderma coffee instead. Ganoderma is the Malaysian word for the Japanese Rieshi mushroom. So, it's mushroom coffee, with a mushroom that uses fungal effect to kill off all kinds of diseases.
There is often very little data when it comes to alternative medicines and herbal supplements. Especially when it comes to treating viruses.
Elderberry extract is an exception. It has been shown in randomized trials to be useful against the influenza virus. No one knows for sure how or if it would help against this new coronavirus.
Randomized Study of the Efficacy and Safety of Oral Elderberry Extract in the Treatment of Influenza A and B Virus Infections
https://journals.sagepub.com/doi/abs/10.1177/147323000403200205
Inhibitory activity of a standardized elderberry liquid extract against clinically-relevant human respiratory bacterial pathogens and influenza A and B viruses
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056848/
Good point!
But when things happen fast, like CV, we need fast answers. Finding the data scientifically can be a painstakingly long process of experimentation, and testing on animals. By the time we find out what works, or what is bad for us, millions might be dead anyway.
In cases like CV, isn't it better to listen to folklore, and use what has seemed to work for thousands of years? If such doesn't work, at least it has been tested for centuries so that people know it isn't poison. If it were poison, people would have been warned away from it for ages, already.