My goodness, thank you for sharing this amazing story!! I think it's absolutely wonderful that your sister had the belief and courage to take control of this disease and manage it herself. I have absolutely no doubt that what she has done will be so much better for her than accepting medication.
Too many people are too quick to take the drugs on offer for their illnesses without properly considering other options - personally I think this can be done out of fear or desperation. Here we've seen the huge effects a radical change in diet can have.
I'll certainly be passing this onto my friend and resteemed so other people can see the power and control you can take over your own health.
Thank you so much to you and your sister.