I don't believe we have the power to heal genetics by natural remedies and/or positive thinking/prayer/hope. Though, I believe those things help us as we walk through adversity. (see my blog: "just thinking...") My reason is that I believe we are mortal, and God is the one in control, not us. Those who believe in natural healing (for genetic purposes) probably don't believe in God. I believe we were born sinners and therefore is why our bodies are subject to diseases. If we were truly evolutionary beings, we should be perfect and without disease by now...
I believe God gave us brains, and gave us doctors with wisdom - use the brains to take the doctors advice. (not saying that western medicine has all the answers, sometimes they do rely more on meds than natural ways...but that is the exception here...)
Ask your friend if she became a Type I diabetic (insulin <u>dependant</u>) would she not take her insulin?
Ask her: why if we have the power to heal ourselves, why she hasn't healed her own <u>compassion meter</u>,
and: why does she want to blame everyone for their medical problems (because that is essentially what she is doing.)
Brush her dust off of you and continue on...People like this believe they can control everything in their life....all of their life's outcome. People like this can't be reasoned with and it's not worth the stress to try to change their mind. It won't change until something happens to them that they can't seem to change. Then they will finally grasp that they aren't immortal.