[wee2er]

You are correct, you can have too much Vit D, I ramped up to taking 10.000/day. I have quarterly blood tests for an ongoing condition and my specialist gave me a bollocking when he say the level of Vit D! He reckoned it was dangerous, as such I dropped it right down.

[Teddy]

It is important to understand that vitamin D levels are bit complicated matter, and even doctors aren't agreeing how much is too much (and how low level is "deficiency"). Some of that you can see in article https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7745884/  Note also, that the best form is D3, while D2 isn't recommended. Another article of interest:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912737/

For me it seems that having in blood level of <30 nmol/L (or <12 ng/mL) is clearly indicating deficiency. And 30 ng/mL (75 nmol/L) is sufficient - and that is supported by authors of the article I mentioned. Over that level the "risky zone" starts, but there is no clear consensus about what is the exact limit of too much. I would like to  propose targeting 20-30 ng/mL or 50-75 nmol/L range, if your MD doesn't protest excessively and give good reasons to his/her protests .

Therefore it is a good idea to go for a blood test, and after that decide if 2000 IE or 4000 IE or something else is the right daily dose. According to some articles I have seen, the individual variation in utilization of orally taken D3 seems to be quite large. Therefore what's maybe too much for one person, may be just right or even too little for another!

By the way, D3 vitamin is eliminated from body very slowly, and you don't need to take it every day. I have sometimes bought for example 5 000 IU capsules, and then taken those every second day. Average was then 2500 IU/day. Next time maybe 10 000 IU, taking every three days for 3333 IU effective daily dose.

-Teddy

[Heaven's Night]

I was on 10000iu for a long time, now dropped to 5000iu. I did notice some possible signs of toxicity (overly high calcium levels) so I wanted to drop lower. I have done high dose for dark months for two years now and its been mostly fine, I'm not sure about the symptoms but it is possible as D3 accumulates, it has a longish half life so its possible to supplement a high dose for example once a week.

From what I've read, to reach toxicity would require very high doses or extended time and most of the time, it is safe to be taken at maximum recommended dose or even higher, especially if done periodically.

[Leggy]

Thank you all for the information. It certainly seems that the dose I am taking is not worth the risks. I think I'll order some 2,000IU Vitamin D3 and take that daily.

Thank you CM213 for the warm welcome.