What about COVID-19 and astragalus?

General Health
Long-time readers know that my "go-to" sources for natural medicines (herbs, vitamins, and supplements) are ConsumerLab.com and Natural Medicines(TM). ConsumerLab has posted about coronavirus and astragalus: Astragalus (or Huang qi) has been promoted on some websites to help protect against COVID-19. Astragalus is an herb that has traditionally been used in Chinese medicine to strengthen the immune system and to treat colds, among many other uses. It may be sold as a root powder, extract or tea, as a single ingredient or as part of an "immune-boosting" formula.  Laboratory and animal studies suggest polysaccharides, astragalosides and other compounds in astragalus increase the production of white blood cells, particularly T cells and macrophages, and other cells important for immune system function (Block, Integr Cancer Ther 2003). It has also been shown to have anti-inflammatory and anti-viral effects,…
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