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A commentary published in Frontiers in Immunology discusses the potential benefits of high-dose Spirulina supplementation for hospitalized adults with COVID-19. The authors argue that previous studies have focused on animal and in vitro research, ignoring their own published study in 2022 which found that Spirulina supplementation reduced the risk of COVID-19 and hospitalization in a group of unvaccinated individuals. They suggest that Spirulina supplementation at a dose of 6g daily could contribute to the prevention of COVID-19 and reduce the need for hospitalization. The authors also mention previous studies on the hepatoprotective and hypolipidemic effects of Spirulina. [Extracted from the article]