(The following are news items and opinions. This is not medical advice.)
Vitamin D supplementation helps to reduce asthma, COPD, and other lung problems
Previous studies have delved into this very matter, with results showing that vitamin D plays a significant role in boosting respiratory health. One finding, for example, honed in on “the known effects of vitamin D on immune function… in relation to respiratory health.” Its population-based study concluded that “Vitamin D appears capable of inhibiting pulmonary inflammatory responses while enhancing innate defense mechanisms against respiratory pathogens.”
In addition to boosting the immune system overall, vitamin D was found to improve lung function in those suffering from respiratory-inflammation conditions such as asthma and chronic obstructive pulmonary disease.
To ensure proper vitamin D levels, the Mayo Clinic says that the recommended dietary allowance (RDA) for adults is 600 IU. For adults older than 70, then 800 IU of vitamin D should be consumed.
Since the half life of vitamin D is about 21 days, it can take 6 months to get your blood work to about 95% of where it should be.
Only 1000 IU/day of D3 would apparently cut cancer rates by 50% a year in the US in 5 years. (note: use vitamin D3)