Vitamin D

[luke.aus]

Hey Jordan, I just invested in some vitamin D.
In another thread I couldn't seem to find, you recommend 4 - 5000ui?
Anyway I was planning on taking 5000ui, because that seems a pretty consistent recommendation.
I bought NOW Liquid Vitamin D, and on the bottle it says to take small dosages (400ui) 4 - 5 times a day. So in your experience, can you just take the whole lot in one sitting, or do you spread it out throughout the day?

[Jordan Feigenbaum]

Since you got the liquid, it really doesn't matter. My 5000iu recommendation is for guys who either a) don't see the sun a lot (it's winter here in the states) or b) live north of the Atlanta latitude. If you're down under and getting sun on the regular, I'd take 1000iu/day. Take it with a meal containing fat too.

[Charlie Davies]

Lots of folks think that Vitamin D affects the sleep-wake cycle, for example here: http://blog.sethroberts.net/category...-d3-and-sleep/
They recommend taking it in the morning, because lots of D close to bedtime can cause insomnia.

[Jordan Feigenbaum]

Makes sense evolutionarily, but not sure if exogenous vitamin D activates the retinohypothalamic tract. Maybe a good idea just to be sure.