Hi Pat, I'm glad your side effects from Forteo are mild.  Remember what you read on the Internet is always going to amplify the negative and those who are doing well (a lot of people) don't post about their positive experiences because they are either out living their lives or feel they have no reason to give their positive stories.  The negative press will always "look" like it out-numbers the positive and the reason above is all I can think of to explain it.  All you have to do is look at the stats on the numbers of those taking it and refilling it over and over until they are done.   Take all negative and positive reviews with a grain of salt, since we don't know these people personally.   As far as the D goes, I would follow your Drs recommendation.  The current NOF recommendations for D is 1,000 IUs a day, but that was written a while back, and is based on those with normal levels.  The Forteo recommendation is from 2002 and those recommendations are out-of-date.   Generally the Drs base your dose on you 25 (OH) D score, so if your Dr doesn't think 26 is high enough that may be why he/she recommended the high therapeutic dose.  It's true, that right now there is no right answer since each of us have differing reasons to take a particular amount of D based on our lab score and other factors.  So each of us would have different recommendations.  The high dose won't hurt you and it's only given for several months until your score goes up.  And yes I've heard the same thing that they want to change the optimal range from >30 to 100 to the >50 to 100 so you'll just have to do some reading and trust your Drs opinion since it's really hard to get into the dangerous/toxic level of vit D for the majority of people on the varying doses you mentioned.   Good luck and let us know what you decide, if you want to, and how well you do on the new D dose.  Just remember the Forteo recommendation was written a long time ago, and things have changed a lot.