I had a bone density scan a few years ago and was diagnosed with osteopenia. I've been taking medication since that time and have seen improvement in the hip and spine area. The forearms continue to be my weakest area
I've been using clipless for a few years and have taken a few tumbles but fortunately I've never broken a bone

At first my doctor was concerned about my cycling. He didn't feel it was the best or safest exercise for someone with brittle bones. He suggested I also do walking and weight lifting. I followed his directions and he's changed his mind about my cycling
Get the bone scan. If you do have a problem now is the time to take action.