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I am just speculating.Sunburn can be magnified on cloudy days for sure! I got blisters twice in under an hour being on the ocean and on lake on a cloudy day. Being B rays create vitamin D and I don't even know what the A ray does, but I think it is just the UV light itself that causes sunburn like a tanning bed.
Thank you, R&R, good to know. During the brutal months of Arizona sun, I do stand behind a window for sun exposure, even though I knew the window glass is preventing or filtering something.I thought so till I just read this.
I never use soap after being out on in the sun because I have heard the same thing many years ago. The angle is also why it is harder to get vitamin D in the winter month, the sun neess to be overhead. The lanolin is interesting, as it is high in D isn't it and we can absorb it through our skin? When I get off the forum I am gonna look into that! As always good stuff Eberhardt!It is perfectly possible to get vitamin D on a cloudy day. As the quote says it reduces it, it does not eliminate it and you do not at all need to get an almost burn. I never have an almost burn and dont get deficient in D due to that as an anecdotal example. Much more important it the angle of the suns rays. The further away from equator the weeker the suns rays during winter (due to angle and refelction) and the less vitamin D. Inner condition is just as important though. The synthesis of vitamin D is among other things dependant on cholesterol. Peat actually recomends rubbing your skin with lanolin (f.ex) as you get older because aging reduces the cholesterol synthesis in the skin making it harder to produce vitamin D and this can be ameliorated by adding a high-cholesterol substane like lanoline to the skin. A healthy metabolism in general will aslo contribute to the production as well as your vitamin A levels as Retinol is an antagonist to vitamin D.
In practice when it comes to the question of clouds, like with all radiation it is time / intensity that makes the difference. Lower intensity rays can be made up for by increased exposure time. And finally Peat has mentioned that if you really need to maximise your vitamin D, it is beneficial not to shower directly after sun-exposure - preferably not washing the exposed skin-ares for at least 12 hours as the production continues for a while and is so close to surface you can actually wash off the vitamin D. I haven seen any research on that but assume he has :) I dont know if it would apply to washing without soap but at least that should be less harmful as I think the solution of the surface fat is crucial in the process and that is mostly removed with soap, but if you want to be sure it cant harm to wait. If you need to shower everyday you can still do it in the morning and be ok
thanks. no its not full of D but it is full of cholestrol making it easier to make D. I think recommendation is for people in ther 50s and up to smear themselves to ease production he at least said "with age"I never use soap after being out on in the sun because I have heard the same thing many years ago. The angle is also why it is harder to get vitamin D in the winter month, the sun neess to be overhead. The lanolin is interesting, as it is high in D isn't it and we can absorb it through our skin? When I get off the forum I am gonna look into that! As always good stuff Eberhardt!
When lanolin is exposed to uvb (I think it’s uvb), it becomes vitamin d (I think also). That’s how they make the supps...thanks. no its not full of D but it is full of cholestrol making it easier to make D. I think recommendation is for people in ther 50s and up to smear themselves to ease production he at least said "with age"
am I recognizing the first one (not the pufa one) of them from somewhere? :) and about timing yeah it depends on where you are. Theres more timing numbers in that article I posted alsoHere are a couple of interesting clips on the subject.
So much I thought I knew just to find out there is so much more!am I recognizing the first one (not the pufa one) of them from somewhere? :) and about timing yeah it depends on where you are. Theres more timing numbers in that article I posted also
I think thats a nice feeling!! mediocrity is always (in the west at least) accompanied by knowing it allSo much I thought I knew just to find out there is so much more!
I am excited to know there is so much more to learn, like finding treasure!I think thats a nice feeling!! mediocrity is always (in the west at least) accompanied by knowing it all
I just noticed I dont understand what I post haha It took some time but there is not this protein AND cholesterol . I didnt make the connecdtion the protein in lanolin is 7-DehydroCHOLESTEROL . ,,,I am excited to know there is so much more to learn, like finding treasure!