Has anyone heard about the Keto diet helping to fight tumours?

You might find you can’t get much past your tongue whilst on chemo anyway.I couldn’t even drink water let alone a supplement! My journey with bc started in 2003 and I’ve been around ALOT of women with breast cancer in the last 16yrs and have only ever met 1 obese woman.Everyone else,either average or slim and most ate a healthy diet.Sure,eat healthy to feel good but don’t think it’s going to prevent bc. The stress of obsessing about a diet is more likely to do that!