Damn, it must be really troublesome to have most of your hair lost by nutrients deficiency.
I suggest you to visit reliable information websites that deal with hair loss and other related issues. Through those sites you will surely find professional articles that may answer all of your questions just like that.
I looked on Google for some, and I will place one here for plain reference.
http://www.surgery.com
on this section:
http://www.surgery.com/sub-guide/hair
There are many other examples on the Net. It's just a matter of having them a go and see what is the best.
Good luck!