When it comes to vitamins, most folks I know take them in the morning. Something about the breakfast ritual makes it easy to remember to pop that multi. But when it comes to vitamin D, switching up the routine will make the supplement more effective. Research from the Cleveland Clinic found that taking the D vitamin supplement with dinner, generally the largest meal of the day, boosted absorption by as much as 50 percent. Considering that the majority of Americans are lacking in this powerful vitamin that boosts immunity, supports with weight loss, and even helps take care of your lady business, you might want to start taking a vitamin D capsule with your evening meal. The fact that dinner starts with the letter D should help you remember, too.