Earlier quoted context omitted.
I live in Seattle and have been depressed for a while. I had my Vitamin D3 levels checked via blood test, and they were really low. Started taking 5,000 IU per day, and I feel exactly the same as before.
5k IUs is well beyond anything your body has a use for, and in fact is above what your body can tolerate! [0] > RDA: The Recommended Dietary Allowance for adults 19 years and older is 600 IU daily for men and women, and for adults >70 years it is 800 IU daily. > UL: The Tolerable Upper Intake Level is the maximum daily intake unlikely to cause harmful effects on health. The UL for vitamin D for adults and children ag…
> Ekwaru et al recently reported on more than 17,000 healthy adult volunteers participating in a preventative health program and taking varying doses of vitamin D up to 20,000 IU/d. These patients did not demonstrate any toxicity, and the blood level of 25(OH)D in those taking even 20,000 IU/d was less than 100 ng/mL.
> The evidence is clear that vitamin D toxicity is one of the rarest medical conditions and is typically due to intentional or inadvertent intake of extremely high doses of vitamin D (usually in the range of >50,000-100,000 IU/d for months to years).
[0]: Holick, https://www.mayoclinicproceedings.org/article/S0025-6196(15)...
[1]: Ekwaru et al, https://pubmed.ncbi.nlm.nih.gov/25372709/