This would be especially true where there is insufficient intrinsic factor produced and/or where the ileum of the small of the intestine is no longer present or able to absorb the vitamin B12/intrinsic factor complex
doi: 10.1111/j.1464-5491.2009.02743.x 134 Barrett-ConnorE
Best vitamin D Price: $ Vitamin D is a key nutrient for lung health, and being deficient in vitamin D may increase your risk of developing respiratory tract infections and conditions that affect the lungs, including COPD ( Vitamin D deficiency has been shown to be extremely common among people with conditions that affect the lungs, including asthma and COPD, and may worsen symptoms and affect lung function in these populations ( Evidence suggests that supplementing with vitamin D may help improve quality of life, reduce disease exacerbation, and improve certain symptoms in people with respiratory conditions like asthma and COPD ( Plus, having higher levels of vitamin D has been linked to improved lung function in the general population ( Researchers have also found that vitamin D deficiency is associated with more severe lung involvement, longer disease duration, and higher risk of death in people hospitalized for COVID-19, and that vitamin D deficiency may increase the risk of COVID-19 ( Vitamin D deficiency is prevalent worldwide, and many people would benefit from supplemental vitamin D, especially those most at risk of deficiency, including African Americans, those with obesity or diabetes, and people who smoke or are over the age of 65 ( Before taking a vitamin D supplement, its important to get your vitamin D levels checked by a healthcare professional
Good news: yes, it does- Medicare does cover injections of Vitamin B12 when determined to be medically necessary for treatment
