Is this iron deficiency anemia or from low B12/folate? Look at her lab results. Look for MCH, MCHC, and MCV. Are they elevated? I assume her RBC, HGB, HCT are depressed?
Liver function (maybe poor estrogen metabolism), thyroid function, low stomach acid and other digestive insufficiencies come immediately to mind. Can she afford to do some functional testing? This is the kind that's indicative of the actual function of the body, versus blood tests looking for disease states. It's the kind insurance generally doesn't pay for but is far more helpful. With this type of testing, you can help her determine food sensitivities, detoxification issues, estrogen metabolism problems, fatty acid balance and more.
Ferritin is the storage form of iron and will help determine if she has iron deficiency anemia. Given her heavy periods, this is a possibility. Insurance will generally pay for these other helpful tests too: Fasting Insulin, TIBC (total iron binding capacity), HbA1c. These will give a better indication of iron stores and blood sugar regulation. Did she have her thyroid checked?
As an NC, if she's willing to consult with Bauman Nutrition, you could be part of the process, sitting in on sessions. It could be a very valuable experience for you.
I would encourage her to seek help either through an NC or through a naturopath, as well as through her regular medical doctor.
This could be an interesting, complex issue for you to study as an NC student. Take good notes, mental or written, as she (with you, perhaps) works bit by bit to uncover the underlying issues. Update us occasionally, if you like. I'd be interested in hearing how it goes.