★★★★★
Vitamin D is one of the most important things you can do for your bones and overall health (along with weight-bearing exercise). Without Vitamin D, your body doesn't utilize calcium properly. Ensure you are getting enough - either through sunshine (spend a few minutes - minutes, not hours! - in the sun without sunscreen) or, if you're in a climate where the sun doesn't shine much (like Vancouver), take supplements. Cod liver oil (high quality only) is excellent. Good luck!