Compounded with Glycine

I’ve been on compounded semaglutide since November and have lost 30 pounds. Recently at a well check up, my provider advised that I have lost 3lbs of muscle despite having good protein intake and continuing to lift weights 4-5 days a week. They suggested compounding the medications with an amino acid called glycine. I haven’t heard of doing this before. I was interested to see if anyone else has done this before or is currently taking sema compounded with glycine. Thank you for any information!