Fingers crossed, indeed, Outrider.
Dehydration (or, maybe more accurately, low electrolytes) can have a lot of side effects, so sometimes it's not so much a matter of hydration as a matter of magnesium and potassium levels. What I've read indicates that people who are low-carbing it no longer have so many carbohydrates in their bodies that hold a certain amount of body weight in water. So water in/water out (not stored), and the Mg and K levels the body normally can equalize with stored water do fluctuate more.
Keeping records is an excellent idea.
Dehydration (or, maybe more accurately, low electrolytes) can have a lot of side effects, so sometimes it's not so much a matter of hydration as a matter of magnesium and potassium levels. What I've read indicates that people who are low-carbing it no longer have so many carbohydrates in their bodies that hold a certain amount of body weight in water. So water in/water out (not stored), and the Mg and K levels the body normally can equalize with stored water do fluctuate more.
Keeping records is an excellent idea.