It all depends on what is good for your body. I have preternaturally low Vitamin D levels. So much so that I had to take a course of Vitamin D bombs once just to get my D levels back to a level where I could actually absorb it.
Since then I started taking 5,000 IU daily, but my dermatologist told me my levels were toxic. So I take 5,000 every two days now. Do what works for you as long as you're not toxic.