@divegeester
I am doing 20k each day, will cut it back as the sun gets higher in the sky.
This should be a source that you believe is true.
A study of healthy women in the USA found a significant inverse relationship between the serum levels of 25(OH)D and TNF-alpha.8 In another report, the levels of IL6 were found to be increased in those who were vitamin D deficient. In a wide variety of animal studies and in vitro cell models, vitamin D3 has been demonstrated to downregulate the production of inflammatory cytokines, such as TNF-alpha and IL6, while increasing inhibitory cytokines.9 These studies raise the possibility that adequate levels of vitamin D may reduce the incidence of cytokine storm, which can occur in COVID-19.
Thrombotic complications are common in COVID-19 patients.10 Of those with severe disease, over half have been found to have elevated D-dimer levels. Interestingly, vitamin D is also involved in the regulation of thrombotic pathways, and vitamin D deficiency is associated with an increase in thrombotic episodes.11 Vitamin D deficiency has also been found to occur more frequently in patients with obesity and diabetes. These conditions are reported to carry a higher mortality in COVID-19. An increased risk of death with COVID-19 is also observed in black, Asian and minority ethnic (BAME) groups. As melanin reduces the production of vitamin D sociated with exposure to the ultraviolet radiation in sunlight, this may help to explain the observed frequent occurrence of vitamin D deficiency in BAME groups.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7385774/