How can I convince my co-worker to see a doctor?

I recently started working at a vegan restaurant/juice place and as you may imagine, it very much attracts the types of people who are into alternative medicine, unfortunately my co-worker takes this to the extreme. Over a year ago my co-worker was diagnosed with Lyme disease and since then she has left it virtually untreated. Though she apparently tried conventional medicine upon her diagnosis, she claims it made her feel worse so she stopped taking antibiotics and instead began to "treat" her lyme disease with a variety of vegan diets.

Since then her disease has only progressed, and at this point it's literally killing her, yet she still refuses to turn to conventional medicine. She is so profoundly affected that she had to drop out of high school and earn her GED. She has severe cramps and TONS of issues with her liver at this point, yet she won't even touch so much as an Aleve. The only "medicine" she uses are supplements like turmeric powder, and juice cleanses.

She is such a sweet girl, and it breaks my heart to see her suffer like this, especially since lyme disease is so easily treated. Her family is well of and I know she can afford to go to the doctor I just don't know how to get her to go. PLEASE, if anyone has dealt with someone like this in the past let me know how you were able to help them. I have no idea how to get through to her and could really use some advice.