Susan,
At this time I am not aware of any targeted therapy. Still new at all these terms and what is used for the different types of cancer. I have had 2ncycles of chemo -- carboplatin and taxol. I start 10 days radiation in my lower spine tomorrow and 1 day on my brain mets. Then we'll see. As someone else posted a healthy diet is more important. Even after only a month, I find that my appetite is not what it used to be. I went from everyone telling me I was obese to telling me i'm not allowed to lose any more weight. I believe you'll find just as many articles noting that sugar "feeds" cancer is a myth. Lots of our cells need sugar. As Tom says, I wouldn't put much stock in Doctor Google. So, don't be afraid to eat. You won't actually be doing our body any good by that. Get a notebook and write down your questions for your doctor. We also wrote questions about nutrition and diets and restrictions. As I mentioned, most of my doctors were more concerned about bacteria causing problems than whether I ate a popsicle or bread for dinner.
Good luck on your journey. There's lots of info thrown at you so fast it can seem overwhelming. Just take it one day at a time.
Hugs and prayers!