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Vitamin B12 is needed to form red blood cells and DNA
Insufficient sleep (typically defined as less than seven hours nightly) disrupts hormones that regulate appetite, increasing ghrelin (which stimulates hunger) and decreasing leptin (which signals fullness)
Since Brazil nuts (the richest food source) may not be appealing on a suppressed appetite, supplementation becomes important
As both play very important roles in the immune response, and the status or availability of one has been shown to directly affect the other, it is likely that deficiency of either can have a direct effect on the severity of COVID-19 as well as many other diseases therefore, taking steps to ensure adequate levels of both is essential to better health
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