Yes, moderate supplementation seems like a good idea, especially at higher latitudes. I'm not sure how likely toxicity through overdosing is, but ultra-high dose vitamins aren't a great idea in general.
The thing is that to begin with, vitamin D, although it is so called, is not technically speaking a vitamin, but a prohormone. Overdose toxicity can occur, but you have to take whole bottles every day for it to happen. Sunbathing alone you can't get it. Also, hypercalcemia, which is the danger of taking high doses of vitamin D, is reversible. It is cured by stopping sunbathing and stopping supplementation. Another thing is that RDAs are very low. 600 IU a day is good for preventing rickets, but not for a stronger immune system. I take between 20K and 30K IU of vitamin D in the winter, which by today's standards is barbaric, and I have noticed nothing but positive effects. No hypercalcemia even going over 100 ng/ml of vitamin D in the blood.
It's worth noting that vitamin D is not a secret magical panacea that is being hidden from us by Big Pharma because it doesn't make them $$$.
Well, I'm not so sure about that. I have said the opposite of what you are asserting, now I will back it up. Vitamin D has a more unknown role (the best known is to bring calcium to the bones), which is to strengthen the immune system:
Vitamin D: its role and uses in immunology Vitamin D and the Immune SystemVitamin D: modulator of the immune system An update on vitamin D and human immunity It is not just a matter of COVID. With a stronger immune system, people would need less medicine.
It's also worth noting in regard to this myth that AZ are providing their vaccine at cost, with no profit motive.
Yes but do Pfizer and the others also manufacture vaccines altruistically and without seeking financial gain?
From what I've read, it seems like only people with serious Vitamin D deficiency ought to take the supplements.
To begin with, as I said before, vitamin D is not a vitamin, although it may seem paradoxical to say so. Then, the current guidelines regarding what is a deficiency are garbage, as they consider that 30 ng/ml are optimal and that a dose of 20k IU is barbaric, when that is what you can get on a summer day by sunbathing moderately for a while.
People should really be careful with self-treatment, even if it's something as innocent as the vitamins, and consult with professionals.
Yes, of course. If I had a life-threatening disease like cancer, I would put myself in the doctor's hands and do what he told me, but for other things I don't trust so much.
For example: some time ago I had put on weight and the doctor gave me some dietary guidelines that are recommended nowadays but they are garbage. Eating five times a day, cereal-based diet, etc. I did what he told me and I didn't stop gaining weight.
Now I do something that is considered barbaric but I have lost a lot of weight, I am not hungry and I feel better than ever: I eat two or maximum three times a day, the basis of the diet being fats. If I go to the doctor and tell him, he will tell me that I am going to faint from skipping meals and to die from a heart attack because of fats. Nothing farther from the truth.
And I could talk about other things, like cholesterol, or how high blood sugar and diabetes can be cured simply by fasting instead of insulin (
Therapeutic use of intermittent fasting for people with type 2 diabetes as an alternative to insulin), but I think I'll leave it here because it would be digressing too much.