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Every saint has a past and every sinner has a future. -Oscar Wilde "The power of accurate observation is commonly called cynicism by those who have not got it." -George Bernard Shaw "The trouble with jogging is that the ice falls out of your glass." -Martin Mull
Dr Vieth has a model of tissue 1,25(OH)2D synthesis and degradation in which the level of active substance is pretty well independent of blood vitamin D level, provided the level is either rising or stable.
Basically, testing your blood for vitamin D is a complete waste of effort as it gives no indication of how much available vitamin D is in your tissue.
..and there's more to it than sun exposure.
From all of this I would deduce that, under marginal levels of UVB in Glasgow, the primary determinant of gross clinical expression of deficiency of vitamin D is vegetarianism. There is a protective effect of meat consumption.</blockquote>
It seems like humans can get away with vegetarianism in the tropics. Move north and you need to eat meat.
Is that simply that meat has contains fat-soluble vit D, the kind that is easily used by humans. Clearly these are modern observations, so it would seem logical that animals would get a lot more sun exposure than a modern human. Therefore animal tissue would have more vit D.
There is a simple way to get your vit D levels up, just get enough sunshine whenever possible. Mark has said that your body will store the D during the summer months when you're getting more so that during the winter months you can use what is stored in your fat when you burn that (vit D is fat soluble). So for me, I just go out and bask in the sun for 15-20 minutes whenever the sun is out.
kong, that might be true... but MOST people (Americans anyway) never get around to burning their body fat... so that stored D would be inaccessible, right?
Good news for us primals though.
Eating lots but still hungry? Eat more fat. Mid-day sluggishness? Eat more fat. Feeling depressed or irritable? Eat more fat. People think you've developed an eating disorder? Eat more fat... in front of them.
Hi! I'm hoping that some knowledgeable folks can help me out with a recent vitamin D issue.
I moved to London (where there is little sunshine relative to my previous location), and recently started taking about 1,5000 IU of a vitamin D3 supplement. Within the first day or two, I've experienced severe insomnia issues (awake until 7 am) and am regularly overheated in the evenings. After 3 days, I stopped taking it about 2 days ago.
I've been reading up on the side-effects of vitamin D3 supplementation, and so far the information suggests that insomnia and sleeping difficulties are a side effect of vitamin D deficiency rather than a potential overdose (this seems unlikely considering my relatively low dose). I am a regular exerciser and nothing else in my diet or routine has changed. Does anyone have any tips or insights on how I may be able to counteract some of the negative effects on sleep? I'm currently on 4 hours of sleep over 48 hours!
Apologies for the long message, and my intention is not to dissuade anyone from taking vitamin D3. I'm sure it's very beneficial for a lot of people, this is personal reaction.
lawrencemak, I've read insomnia can be a side-effect of taking Vitamin D and it is suggested to take it earlier in the day. Try taking yours earlier and see if that helps. I take mine (10,000 IU) just before going to sleep and I still can't wake up in the morning
Thanks for the suggestions. I'm not quite sure about the timing issue. At this point, I'm not too keen on continuing to take it given the personal side-effects. On the days I did take it, I took it with food around 11 am or so. And, it's been two days since I last took it, and I'm still feeling relatively affected. Maybe it's gotten to a point where I'm psyching myself out a little bit around bed time?
So far, the preliminary (and probably relatively superficial) research I've done hasn't offered up any helpful information. I'm worried that since it's a fat soluble vitamin that the excess D3 will take a while to flush out and I'll be affected for a while. Is there any benefit to significantly increasing the amount of exercise and water intake in hopes that the D3 will flush out faster?