Hi, keriberry. I don't know anything about MS so don't take what I say as more than conjecture.

I have a question, how soon after starting Atkins did your aunt start having the leg weakness? If it was in the first week, it might have been to do with normal first week to two adjustment to lower carbs.

The other thing that comes to mind is that maybe she should try a plan that offers more carbs. I would like to suggest she try The Schwarzbein Principle. It's higher in carbs and so slower weight loss, but it's been working for me. And Dr. S. calls it a healing program, and it really does work. And I typically eat 60 to 80 grams of carbs or more a day. I lose weight, but very very slowly.

;-Deb