BCA Month Beauty Most Anticipated Fall Children's Books Hallo nav_sap_plcc_ascpsc Learn more about Amazon Music Unlimited PCB for Musical Instruments $69.99 Grocery Handmade Gift Shop hgg17 Save $30 on a Deep Cleaning Appointment raydonovanfinale raydonovanfinale raydonovanfinale  Three new members of the Echo family All-New Fire HD 8, starting at $79.99 All-New Kindle Oasis South Park Shop Now HTL17_gno

What exactly does IU mean and what would be the difference between taking the 5000 IU version or the 1000 IU version of this item? Just less pills to take or what? I am indoors and get less than 30 minutes of sunlight per day so wanted to take a vitamin D supplement but this is kind of confusing.

asked on September 28, 2011

This question doesn't have any answers yet.