I just started Forteo which is giving me side effects but I have no choice for now. However, I have a friend who has used a supplement he puts in a smoothy daily which he credits for keeping his bone density in good shape in spite of taking massive doses of steroids for years. I am using it myself now so hope it will help preserve any improvements after I stop Forteo. This is the link:
https://smile.amazon.com/MRM-Nutrition-Maximizer-antibiotic-Gluten-Free/dp/B07DRTRVCZ?content-id=amzn1.sym.deffa092-2e99-4e9f-b814-0d71c40b24af&psc=1&ref_=pd_bap_d_grid_rp_0_1_t