Vitamin D and Covid-19
Recent reviews have shown a link between vitamin D status and COVID-19. Essentially, COVID -19 patients who were vitamin D sufficient (< 30ng/mL) had a significant decreased risk for adverse clinical outcomes. However, these reviews have been scrutinised for the quality of the studies, time frames and lack of ethnic diversity.
Vitamin D is produced in the skin from exposure to sunlight, with little coming from diet. It should be considered that people who spend more time outside are generally more active and therefore have better overall health and cardiovascular fitness.
Generally, more time outside = higher vitamin D levels
To supplement?
Vitamin D is vital for many functions in the body. There is a mountain of evidence demonstrating the importance of vitamin D status and overall health.
Lockdown and other restrictions imposed by COVID-19, means many people will not have had the usual amount of sunlight exposure. Even during the summer months, it may be advantageous to supplement.
Vitamin D supplementation decision tree (below) may help. The standard vitamin D test measures 25(OH)D, however this measure may not be an accurate indicator of status in people with darker skin. In this case bioavailable or free 25(OH)D should be measured.
How much?
Vitamin D3 supplementation of 1000IU to 2000IU per day is usually recommended. It may be recommended to get a blood test and seek professional advice.
Full article available at https://www.researchgate.net/publication/322679086_Vitamin_D_and_the_Athlete_Current_Perspectives_and_New_Challenges
