Staving off Keto flu is about keeping electrolytes up, you have the right idea there. But I wonder.. Can't say for sure that cannabis doesn't help with it, maybe it's one of the consequences of CBD. I haven't taken an ibuprofen for decades, cannabis is my miracle prescription for most ailments, unless instructed otherwise by a physician.

Reading your post again though, are you sure you're suffering keto flu? It's supposed to be a sporadic thing as your body flips it's metabolism. Not supposed to last more than the day. Are you positive you're not vitamin deficient?

Speaking strictly for myself, if I felt terrible on Keto, I'd break it. Have a good, hearty meal. Get my body back up to par. Then try again. But maybe you can focus on making sure you have enough potassium, magnesium, and of course sodium.. and take a multivitamin.. but it's better if an actual nutritionist guides you on that, which I am not.