Hi Les, welcome.  We need to watch our D levels by having a 25 OH D test, which should tell you how much you need to supplement.  I would ask your Dr. what to do since it all depends on this critical tesing number.  Here's another opinion on this new recommendation from the Vitamin D Council; keep in mind it's "their" opinion.   The IOM raised the RDA from 200-400 IUs a day to 800 a day and raised the Upper Tolerable Limit to 4,000 a day.  If your vitamin D levels are low, you may still need to supplement above the recommended amount until your Dr. sees that you've reached an acceptable number.  The only way to know this for sure is to talk to your Dr. about your D test results.   Good luck...