I've discussed ezcema with a few friends and sources and I think (again, only my opinion) that if it's not due to a deficiency of, it certainly can be helped by, Essential Fatty Acids.
When I mentioned some good quality oils, like flaxseed, it might be a good idea to up your friend's intake of fatty fish (easier to take and closer to the higher bond EPA than flaxseed - long story!). A safe way to try this might be to swap out some other protein sources and insert coldwater fish at meal times four times a week for two weeks, to see how her skin responds. The best sources of EFAs in fish start with sardines and mackerel, then salmon, then anything else from cold water. Sardines and mackerel are very cheap and very nutritious. Make sure they're fresh!
After two weeks, check on the skin. If there's a little improvement, maybe try extending the protocol for a bit longer, making sure you aren't sacrificing any food groups by doing so (except dairy which we don't really need and calcium, Vit D, etc. can be sourced easily elsewhere if not from the fish).
I used to eat fish four times a week in Sydney and had dry skin. It turned out I had a fungal infection (candidiasis/thrush/athlete's foot) and wasn't absorbing. I got rid of it, ate the same, and now my skin is the envy of my wife!
Good luck and let us know how you get on.
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