Hello,
I have used Serrapeptase for years on my reptiles. It has a lot of different functions that it performs, & is a very safe supplement to use with no side effects. I do sell it on my website, but I have a few articles on it if you want to read on it. I searched for some of the best articles for educational purposes. Here is a link to my site & if you scroll down to the product Serrapeptase, there are buttons beside it to where you can click on them to read the articles.
http://www.bug-de-lite.com/Products%20Page.html
So, it is up to you if you want to try it. It certainly wont hurt your dragon & may help get him out of a slump following brumation.
If you have any other questions, just let me know.
Tracie