Can weight fluctuate up to 7 pounds?

tigersword

It is almost impossible to drink too much water. Most people are not hydrated enough.

Totally false on both counts. Hyponatremia is fatal, and happens, relatively rare, but it happens. Also, humans are better hydrated today than we have ever been at any point in human history. To say "most people are not hydrated enough" shows a complete lack of knowledge on the subject, and that you're just parroting the marketing campaigns from Gatorade and bottled water companies, who push that line to sell more product.