Im currently taking a vitamin d supplement just to make sure my body has enough since the area i live in winters could be long, the dosage is 5,000 iu per softgel which is 625%, should i take one each day ? or one a week im 28 and young and active

That's a big dose: People usually take 400, 800, 1000, or 2000 units of vitamin D each day. For people who have very low levels of vitamin D, they might take 50,000 units once a week for a few weeks (to store up a bunch of vitamin D in their bodies) and then switch back to perhaps 2000 units each day. Young adults who are healthy and active outdoors are less likely to be deficient. Also, count food vitamin D intake.