You may have a deficiency of one or more of the following: calcium, magnesium, vitamin D or vitamin K. All are necessary to build strong bones. I've been supplementing since I was about 30 years old. I am now 70. In January I fell down a full flight of stairs in the middle of the night. I was trying to find the way to my bathroom with my eyes closed and felt myself falling. I thought I was in the bathroom but when I opened my eyes I was at the bottom of the stairs. Miraculously, I didn't break a thing, just got banged up a bit. I attribute my staying in one piece to my long history of getting the nutrients I needed. Please stay away from the "bone-building" drugs--they build very brittle bones. Also, two therapies that help bones heal faster are pulsed electromagnetic frequency therapy (PEMF) and red/infrared light therapy, also known as cold laser therapy or photobiomodulation. Here is a home use device I recommend that combines both: https://dnavibe.com/pages/aptd