How fast can Vitamin D levels drop?
I was deficient in Vitamin D Nov 2011. The 25(OH) Hydroxy test revealed it was only 5.6 ng/ml.
My doc advised me to take supplements (4000iU) and after a year I retested. The levels are normal again - about 45 ng/ml.
My question is - If I miss/stop taking supplements, how fast can the levels drop for a 40 yr old healthy male? Lets say I dont take it for 2 weeks, will it go back to deficient levels? or does it go down gradually?
I m planning to travel out of the country for 4 weeks and dont want to carry my supplements with me.