Yeah those vitamin D reference amounts aren't my recommendations, they come from the nih as a reference. The guidance on Vitamin D/D3 intake is all over the map. Everyone has their own personal view and their science. My own choice is to take between 5,000iu - 10,000iu of vitamin D3 based on what my needs are (which can range from fighting off infections, bone health, or a boost to breast growth).

Thanks for you're reply Teddy