Posted by Marc Martin on
URL: https://www.es-forum.com/SEASONAL-EFFECTIVE-DISORDER-SAD-ES-tp1550341p1551280.html

> I've had problems with it, and it was getting worse every year, until
> about 5yrs. ago, I read it is largely from a vit. D deficiency. I started
> taking 7,000 IU daily, and it made a whopping difference. Don't take it
> for a couple days, and hibernation mode wants to set in again, it makes
> winter much better for me.

7000 IU! You know, there is such a thing as Vitamin D toxicity, although
I don't know how much one would have to take for that...

Marc