I just started BHRT about a month ago and am hoping doc will increase estradiol when I see her in 3 months. Dose I am on now is not bone protective. I also use Osteonaturals collagen. I get most of my calcium from my diet, stay active, take a Vit D supplement and a low dose of K2. I have lifted weights on and off but am currently beta testing an app for building bone strength. Nothing else.