In over 110,000 subjects, those in the highest quintile for DHA status were 26% less likely to be hospitalized compared to those with the lowest DHA status.
In a group of 100 patients, a quercetin ingredient marketed by Indena was linked to milder symptoms and faster conversion from positive to negative tests.
However, meta-analysis concluded supplementation with vitamins C, D, or zinc was not associated with mortality benefit among hospitalized COVID-19 patients.
While the topic is hotly debated, large-scale associations between higher vitamin D concentrations and less severe COVID-19 outcomes are still being found.