10/10/2024
I loved the debate. It would be great to see studies quoted of younger people suffering from allergies, asthma, eczema and how vitamin D supplementation may help them regulate their immune response better (not just quoting studies of elderly people in care homes as their overall health outcomes would be compromised, the cardiovascular disease (CVD) risk is higher in that age group and issues with absorption of calcium would be more prominent).
In addition, what about the significant group of people who do not eat dairy due to allergy, intolerance or vegan diet and have lower calcium intake from foods? Wouldn't they benefit from calcium supplementation to prevent damage to their bones and teeth? Could you provide studies of these groups? Also, calcium is better absorbed with vit D3, K2 and magnesium which was not mentioned and the type of calcium in supplements can determine how much of that micronutrient is absorbed (e.g. calcium carbonate is poorly absorbed, calcium citrate or bisglycinate provide higher absorption rates). It would be great to see more studies on these specific groups discussed which cover wider age range (children and young adults).
It seems that before we advise people to stop giving their children vit D during the winter, we need to evaluate studies of children who suffer from frequent chest viral/bacterial infections, frequently miss school and get poor growth and learning performance as a result of frequent illnesses and antibiotic treatments. Do you have studies of these children who could benefit from taking vit D rather than being sick 4-5 times in one winter and getting multiple antibiotic prescriptions which would further damage their microbiome?
Finally, it would be great for more studies around absorption. Everybody has a different absorption capacity and getting vitamin D from mushrooms may not be the most bioavailable source for them. Unfortunately, not every family can afford a winter sun holiday and have heard many medical practitioners say if they could, they would prescribe a sun holiday! However, for the wider population, a high-quality vit D supplementation may still be the most affordable option in the UK winters when we may have months on end with grey skies...
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