Hey @mercuryrose,
We have lots of newer members that have recently had a knee replacement like @doodles418, @ezas123, @dismaydee, @ellie125, and @ggst so perhaps they can contribute some advice.

Here is another discussion that mentions supplements prior to surgery. https://connect.mayoclinic.org/discussion/taking-supplements-before-tkr-surgery/

Have you had your first meeting with Dr. Bingham yet?