Yes I take that everyday sometimes more. When you are out in the sun for 20 minutes you get over 20,000 units of vitamin D. Imagine how much you get at the beach or working outside all day? If you aren't getting at least 20 minutes of sun exposure over 30% of your body every day you need a lot of vitamin D. I take the 1000 unit small gel tabs. A blood test will tell if you are Vit D deficient but if you stay inside you probably are.