running five miles a day as a cure or prevention for kidney damage? that's a new one on me. I've heard of planting your vegetable seeds at the new moon, though. Which, I gotta tell ya, I trust more than that running cure superstition.
I'm trying to work out the logic of it...and just failing. Is it that he's confusing ketosis with ketoacidosis? And thinks that the ketone bodies we produce are damaging and that if we burn them up with that cardio, we'll be okay????? I'm being kind here, giving him credit for that physiology knowlege. But if that's what he's thinking, that'd be wrong.
Ketosis is a term you could look up in the search function here. Look especially for Doreen's posts on it (or really any administrator's). Humans were designed/evolved to be in ketosis all winter long. It's not a bad thing. It's safe, unless you're a Type I diabetic (who would have never survived childhood in prehistoric times, btw.) It means "fat burning." And it gave me a pleasant high for about 10 days, but nothing worse.
However, yes, he is right about drinking the water! Whenever we lose weight, the burning off of fat is going to create biproducts that we want to get out of the system. Water helps do that.
Drinking water (not tea, not diet cola, not crystal lite, not coffee. water) is good for us for oodles of reasons, but on LC it is indeed at least as important as at other times. Many modern people in industrialized nations are chronically dehydrated. (and chronically deficient in EFAs and EAA's, but that's another post)
IMO, based on the reading I've done, ketogenic LC is worrisome for three groups of people that I can think of: pregnant women, type I diabetics (tho read Dr. Bernstein on this before you make a final decision on that for yourself), and people with pre-existing kidney disease. Doreen or another admin with more medical background could correct me on this.
In addition, high-fat diets (which most LC plans are) can raise cholesterol in 15-25% of the population. The connection between serum cholesterol levels and health, though, is still very theoretical, and it's clearly different for men than for women. And most of us (the 75-85%) get dramatic improvements in our cholesterol on LC.
"Thank you for caring!" is the best response I can think of to these people. If you want to add, "But it's really none of your business, and I'd prefer not to discuss it again," that's also polite, okay to say, and well within your rights. Or if it's a guy, you could give specific details about what it's done to your menstrual period...that should send him out of the room and make the same point.