I agree with Mart1n, do everything. Getting your bodies sulfur stores up, in IMHO, is as important as the MMS. I would do it all very incrementally.
Do the DMSO skin test (Jim mentions it in his book) to see if it burns her, If it does I think it means we are "sulfur depleted". If she does burn with the topical DMSO, thats an indicator that she has to go really slow on all sulfur compounds or she'll herxheimer bad (because her body doesn't have enough and when it gets it its going to go nuts trying to cure her fast) , so she has to go really really slow. The problem is your body can not function in a sulfur depleted state. Get her to start with Epsom salts baths (2 cups, then get to 4 cups in a day or so) and 1/2 tsp Epsom orally daily. She can try MSM, but I would try that in an enema long before I ate it. Eating the methylated Sulfur compounds (DMSO, Methylsulfonylmethane (MSM), N-acetal cistine, etc) can get your body healing way too fast, mostly the problem is that you circulate too much junk from die off, and that plugs up and overlaods your colon. For some reason when a person uses the Methylsulfonylmethane (MSM) in enama it does not seem to cause the super healing (herxheimering) but it does really detox your colon. Epsom, in enema, does nearly the same thing.
She should be eating lots of: castor oil, cod liver oil, Epsom and anything else she can think of to not get constipated. She has to poop 2-3 x a day, thats the rule, any less and she'll get her colon overload and she'll get sick, hurt, flu, etc.. then shell later get diarrhea, etc. etc.. she has to poop when shes getting well, but if she goes too far she'll also get sick, its a balancing act.
Donor organs for transplantation are transported in a gallon of DMSO, they are floating in the stuff, so it wont hurt anyone. Only those who are sulfur deficient have issues and they are going to always have issues until they get their sulfur up, and heal their delayed issues, that have been waiting on enough sulfur to get started, slowly and get through the problem of not having enough sulfur. GMO food is nearly completely devoid of sulfur! Sulfur is the 4th largest constituite of our bodies and its used in mucus, hormone production, etc.etc.. its vital in large quantities.
If any of the sulfur additions cause her to: hurt, get sore, etc, then she has to enema. This is what she does:
2-3 tsp instant Coffee, 1gm turmeric curcummin, 1gm Methylsulfonylmethane (MSM), a portion whatever her MMS (CD) dose is, half maybe. Put that all in an 8oz enema bulb, get it in, lay on your right side and try to keep it until it absorbs. If you loose it, wait a while and do it again. Its important to retain one AM and one PM at least, when you a re getting sick from herxheimers/die off. The enemas will bind with the toxins she is circulating and she'll feel better in about 20 minutes, and even better again in 30. I did this on my wife yesterday and she said it worked like magic. Every time my wife get sulfur, nearly any sulfur, she herxheimers, the Methylsulfonylmethane (MSM) enema is the cure. She has also recovered with Epsom in enema, and thats great too, but the MSM is better. She overloads her colon, this is what happens when a person who is sulfur deficient starts getting their desperately needed sulfur. It has to happen, and they have to find their way through it to get their sulfur stores up or they will never get well.
The other thing she should try is the "Turpentine test". Get her to eat 2 drops today in some oil, I use hemp oil. Then if all goes well try 4 drops tomorrow am and stay there for a few days, then go up, slowly. It took me about a month to get to 70 drops a day. If she gets any: diarrhea, excessive pooping, etc.. on a few drops, shes got a parasite. A normal person can eat 1 tea spoon, thats 76 drops, of turpentine and absolutely nothing happens. Don't forget that!
Read my posts "Turpentine", "Sulfur" read all my posts.