If you think the stress of the biopsy is too much for now, you could just postpone it, and go gluten free and see if that helps.

Sometimes going gluten free fixes things very quickly.

I do think she should take some magnesium ...maybe not a laxative dose, because most people are low in this anyway!

I have a magnesium thread here:
http://neurotalk.psychcentral.com/showthread.php?t=1138
for ideas.

Just over the RDA may give a little laxative help. If you go too high the resulting diarrhea may deplete MORE things!
So people usually start low and increase slowly until they start getting loose.

Once some of the inflammation goes down by going GF, then the other intolerances may stop leaking thru, and go away. No guarantees tho.

With all this complex stuff going on she may also be low in Vit D and B12. Low D affects the immune system and many other issues.
We have some good vids now on YouTube:
This thread has 3 links to videos on the newest:
http://neurotalk.psychcentral.com/sh...255#post582255

Malabsorption happens when there is gluten intolerance. Then a cascade happens with poor absorption of everything else.
I'd get some blood testing for Vit D levels. Fixing that may help alot.

She may not be absorbing zinc. Low zinc causes hair loss.
There are many dominoes to fall when one system goes wonkey!