The highly recognized Centers for Disease Control and Prevention (CDC) extolls the virtues of vitamin D in maintaining a healthy immune system, advocating a reasonable degree of supplementation along with vitamin C and zinc, also well-established infection fighters. While toxicologists feel that 4000 IU (International Units) of the sunshine vitamin in one’s bloodstream serves as a tolerable upper limit, this might only prove useful if one’s body already possesses adequate amounts of stored D. Only a blood test can reveal genuine vitamin D deficiencies or rare excesses. Such a client might benefit from a reminder to get plenty of D, through food sources or regular sunshine exposure.

If a client suffers from Inflammatory Bowel Syndrome (IBS), note that they may have impaired D signaling within the intestines, perhaps contributing to the host of comorbidities typically associated with IBS. This combination strongly suggests an association between appropriate vitamin D stores and a properly functioning immune system. A serious COVID-19 infection often plunges one’s immune system into overdrive, resulting in rampant lung inflammation and concomitant shortness of breath, which can thwart or halt workouts.Ī recent study analyzing over 200 patients hospitalized with a COVID-19 infection revealed that those with sufficient serum levels of vitamin D exhibited a reduction in the severity of the illness, lower levels of C-reactive protein (a marker for inflammation), an increase in the immune system’s lymphocytes, and a decreased risk of death. David Meltzer, Chief of Hospital Medicine at the University of Chicago, has explored the potential impact of diminished vitamin D levels on contracting the novel COVID-19 virus. In addition, this D deficiency tends to affect older adults, obese individuals and those living in nursing homes- many of the same demographics hit hardest by COVID-19 infections, and with the most vulnerable immune systems.ĭr. Vitamin D deficiencies abound worldwide, notably among individuals whose darker skin pigmentation makes absorbing the vitamin through sunlight all the more challenging. Before advising clients on supplementation, learn about the intricacies of this hormone-like vitamin and how it affects key aspects of the immune system. Perhaps best known for its ability to shore up bone health, vitamin D also plays an important role in immune function and inflammation.

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