Is Vitamin D beneficial for Respiratory Infections?

"Let’s consider some of the evidence for vitamin D and CO....:

• A meta-analysis of 25 randomized controlled trials showed that vitamin D supplementation significantly reduces the risk of acute respiratory infections in the overall population by 12% and in those with profound vitamin D deficiency by 70%.

• Fifteen studies have compared survival rates between groups with higher and lower vitamin D levels, and consistently show that people with higher levels of vitamin D do better, especially compared with those who are deficient, which describes 42 percent of the US population. The findings of these fifteen studies clearly contradict the two negative studies referenced above.

• It is well known that vitamin D is critical to the immune system. It activates the immune system’s defenses, enhances the function of T cells and macrophages against pathogens, and is critical to the production of cathelicidin, an antimicrobial peptide."

Source, full article with some recommendations: https://anh-usa.org/is-vitamin-d-a-covid-bust/