Individuals with chronic obstructive pulmonary disease (COPD) may experience improved lung function

http://keeganqvtm506.almoheet-travel.com/what-you-need-to-know-about-vitamin-b12-and-insomnia

Individuals with chronic obstructive pulmonary disease (COPD) may experience improved lung function and reduced breathlessness with methylcobalamin B12 supplementation