I have written previously about the importance of winter Vitamin D supplementation. Despite its importance, it’s estimated that anywhere from 30% to 80% of the U.S. population is vitamin D insufficient. A nutrient insufficiency differs from a deficiency in that a deficiency causes a disease, in the case of Vitamin D a deficiency causes rickets and osteomalacia. Vitamin D insufficiency doesn't cause a disease, but neither does it promote optimal health.
Vitamin D is a fat-soluble micronutrient that promotes calcium absorption, it also modulates cell growth, neuromuscular and immune function and reduces inflammation. There's a growing body of scientific analysis that is suggesting Vitamin D has an important influence on COVID-19 symptom severity.
Last year, in the scientific journal Nature a group of researchers published a study of vitamin D level among asymptomatic and critically ill COVID-19 patients.
The researchers compared people with asymptomatic infections to people with severe infections: 97 percent of people in the severe group had vitamin D deficiency vs. 33 percent in the asymptomatic group. The fatality rate was seven times higher in the low vitamin D group (21 percent vs. 3 percent).
All of these studies (there are over a dozen of them now) are observational studies that are correlative and don't prove a causal relationship between vitamin D deficiency and COVID-19 severity. However, the strength of the relationship might justify the inclusion of recommending vitamin D supplementation in public health advice.
I advocate vitamin D supplementation in the winter because :
Vitamin D is incredibly safe when taken at appropriate doses (up to 8,000 IU/d).
Vitamin D insufficiency is widespread in the industrialized world. It’s estimated that anywhere from 30% to 80% of the U.S. population is vitamin D insufficient.
Vitamin D is relatively cheap.
Vitamin D is readily available without a prescription.
The benefits of correcting vitamin D insufficiency are well established.
We might now add to this list that vitamin D could reduce the severity of COVID-19 symptoms. Of course, we can't out-supplement an unhealthy diet or lifestyle. So make sure you continue to eat whole unprocessed foods. drinks lots of water, and get daily exercise.
Bring Your Food Donations to Class!
The Halloween tricks and treats are in full force today as your take on a partner MONSTER MASH from CrossFit Linchpin. We do this every Halloween. ENJOY!
Fall Food Drive is ON!
October Mobility Challenge Ends this Week
All this week we are retesting our mobility via the free GOWOD Mobility Assessment. The most improved man and most improved woman will win a prize. You can see from the image above that the men in the gym have the biggest opportunity for improvement.
We are awarding a prize to the athlete with the highest mobilization time on the GOWOD app. We had 18 people who officially took on the GOWOD App challenge and collectively we logged 42 and a half hours of mobility in October. Way to go team!
Debbie is the athlete who logged the most time this month with nearly 5 hours of mobility. Nice job Debbie!
Share with us in the comments your experience of our month long focus on mobility. Do you feel better in your body? Did you notice a change in your performance? Your coaches want to know!
Fall Food Drive Oct 30-Nov 18
We are getting a head start on the Can the Griz Food Drive. We also have a fun twist, each class is competing against each other to see who can donate the most food! Will the 6am class be most generous? Perhaps the 5:30pm class has better odds for remembering to bring food to the gym? Either way, we start today!
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