Anyone Tried A Keto Diet?

Hi all, I'm 1 year into my diagnosis (as of later this month).  I have grade 3c low grade serous carcinoma of the ovary.  Slow growing, chemo ineffective.  

I'm wondering if anyone here has tried a ketosis diet?  I've heard it's a good cancer diet as it starves the cancer of the carbs it needs to grow.  Any successes? Any find it completely useless?

Thank you!