These are the doctors that know how to treat MTHFR. Naturopathic, Integrative, Holistic, Environmental and Molecular. Not all of these doctors know how to treat it so you must call and ask them and still be weary. I own MTHFRsupport.com. I don't have all the information up yet but I have some beneficial links on MTHFR. Homozygous 677 is manageable with high doses of methylcobalmin, lmethylfolate, P5P and TMG.
You can also go to MTHFR.net and do a consult with Dr. Ben Lynch.
Let me give you a small summary on MTHFR. It is an enzyme deficiency. Your daughter's homocysteine is most likely elevated and cannot be converted into methionine. You want to keep her away from environmental toxins and things like preservatives, additives, canned foods, vaccinations with thimerosol in them, makeups and haircoloring that are not organic, amalgam fillings and there are lots of medications that will reduce your active b vitamins. I have a list of them on my website. If she needs surgery, you want to let the doctors know she has to be put under like a child with autism. You want to keep her away from any foods fortified with synthetic b vitamins. They will block the active b vitamins from working. She also should be tested for gluten intolerence. Most of us with MTHFR mutations eventually end up with gluten intolerance. Thyroid function is another thing we have problems with. Doctors don't normally test for TSH and ATP in a thyroid function. That is normally where someone who is compound heterozygous or homozygous has a problem.
If you go to youtube and look for MTHFR Dr. Rawlins lecture, watch all 4 parts. He works with what he has found out through the Human Genome Project. This is manageable. Don't lose hope. I do have a chat forum on my website. I just haven't converted most of my group over to it yet because I am still working on it. Hope I could help.