most recent 30 from http://paleohacks.com 2013-05-20T20:21:26Z http://paleohacks.com/feeds/question/22443 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation qualia 2011-02-09T10:06:32Z 2011-03-01T05:54:05Z

<p>i have supplemented vitamin D3 for around 1.5 years now. the first 12 months on ~10'000IU/d not much happened - my blood level always lingered around 60nmol (24ng). </p> <p>now, suddenly, within the last 6 months (while still on 10kIU), my level jumped to 277nmol (110ng)! dr. davis also did a blog post about this phenomenon: <a href="http://heartscanblog.blogspot.com/2011/01/topping-up-your-vitamin-d-tank.html" rel="nofollow">http://heartscanblog.blogspot.com/2011/01/topping-up-your-vitamin-d-tank.html</a></p> <p>Q: has anyone here experienced the same weird "hockey stick" phenomenon while supplementing with D3? what were your blood levels (dosage, before, after)? could you identify any clear factors that may have influenced/caused this jump? maybe adding vitamin A, K, or Ca/Mg? or maybe the villi tips (where the vitamin D receptors are located) just healed from going gluten free?</p>

http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation/22449#22449 Ryan H 2011-02-09T11:34:09Z 2011-02-09T11:34:09Z

<p>Vitamin D is stored in your fat cells, so if you have lost any weight it could have effected your Vitamin D levels. </p> <p>If you keep taking Vitamin D then your ability to store it just fills up, it would make sence to end up taking a maintance dose after that. Larger people normally are required to take more vitamin D to raise then their levels then a smaller person would. </p>

http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation/24448#24448 terrence 2011-02-23T17:59:44Z 2011-02-23T17:59:44Z

<p>I saw almost the same thing - using the same amount of D3, and seeing my blood level jump to about 260.</p> <p>I think Dr Davis is right about the tank getting full, and that the other commenters are right about fat loss affecting the storage capacity - reducing it, and driving up the blood level. </p>

http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation/24469#24469 ABP 2011-02-23T19:29:41Z 2011-02-23T19:29:41Z

<p>I started taking 10k IU about 6 months ago. I didn't have an opportunity to get baseline bloodwork done when I started, but I just got tested at 120ng/ml. (I also lost about 45 pounds in that time.) Since my "tank" seems to be full and the sun is starting to come out I'm going to stop supplementing and see where my levels are 6 months from now.</p>

http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation/25422#25422 Ducks 2011-03-01T05:02:40Z 2011-03-01T05:02:40Z

<p>It might be worth noting that 10k IU / day is considered the absolute upper limit on safe dosage, and presumes no sun at all.</p> <p>4k IU / day was the highest number I've seen recommended by a nutrition research institute (the study for it came out last week).</p>

http://paleohacks.com/questions/22443/non-linear-response-to-vitamin-d-supplementation/25424#25424 Travis Culp 2011-03-01T05:54:05Z 2011-03-01T05:54:05Z

<p>I got about 30 minutes of sun with no shirt all summer near solar noon and I've been taking 5000IU since October or so. I just had blood drawn today for vitamin D among other things, so I'll report back with the result as soon as I get it.</p>