Hi C.F ,
in my point of view its bcoze of vitamin-D defficiancy , as Manal & Sharmin has said that Vit-D help's bones to absorp Calcium .... there are 2 ways of getting Vitamin-D .
1) Having some sun light/sunshine , as sun light is a big source of vit-D and its natural & safest one ...
2) supplements ...
i m on both as here in Pakistan sun shine's almost 12 months .. ad my doctor prescripted me vit-D + sunshine ...
i dont know about climate detail of your city but canada has a Cold cloudy climate, as far as i know ..
if your daughter were not on Vit-D supplement in past and there is less sunny days, then its mean it is the main reason of having Vit-D defficiancy & Vit-D Defficiancy is a big reason why calcium not absorbed in her bones ..
having enough calcium in body isn't all that you need , ou also need to get calium absorbed in your bones and thats where you need Vit-D enough in your body , otherwise calciumis nothing for your bones ,and can't work for your bones ... soo keep an eye on her vit-D level as well ....
as for as you asked " is it reverseable , my answer is , as i shared my stor in wat a bad condition i was .. but now i m back in life , playing cricket ,footbal walking running and doing everything i want .... wat it mean's ??... it is 100% reverseable , dont worry She will get well soon .. alot of people keeping her remember in their prayers .. she wil b fine soon
Andy , please correct me if i m wrong or mis-guided somewhere in my post ..
Best Regards
Take Care
Umair