(Living in the Pacific Northwest, where it is often cloudy and raining) I take vitamin D supplements)

Researchers discovered 80% of 216 COVID-19 patients at the Hospital Universitario Marqués de Valdecilla had a vitamin D deficiency. Men had lower levels of vitamin D than women and COVID-19 patients with lower levels of vitamin D had increased serum levels of inflammatory markers such as ferritin, a blood protein containing iron, and D-dimer, a protein fragment made when a blood clot dissolves in the body. The latter is usually elevated in COVID-19 patients, according to a July study published in the “Journal of Intensive Care.”