Vitamin D has longer than expected half-life: Tests may not show true 'plateau'

Tests to assess levels of vitamin D status months or years after supplementation finishes may not be showing a true rise - or plataeu - in vitamin D status, according to new research that suggests it may take up to three years for stocks of the vitamin to be fully utilised.

http://www.nutraingredients-usa.com/Research/Vitamin-D-has-longer-than-expected-half-life-Tests-may-not-show-true-plateau?