I do take it with food Sherrine and I take carafate to coat my stomach. I took one 400 IU pill last night and two of the chocolate calcium/D chewables which contain 400 each.
I had to ask to have my D checked too. I'm educating my doctors on fibro cause most of them don't realize that low D is common among fibromites.
When you have blood test get the numbers don't let them tell you that things are normal. I always ask what the numbers are and find out what is the normal range.
Vit D isn't going to help all the fatique problems but I could tell a difference within a couple of weeks.
My doc says it's not that we don't get enough vit D it's that we don't absorb it right so it takes more for us.
Vit D has something to do with depression and high blood pressure too.
Energy was one of those things I took for granted til it was gone and boy do I miss it.
luv and hugs
Marlee