Why is it only water? Aren't beverages counted?

Kidneys are like filters, they need pure water to be cleaned, and you need to replenish 30 grams per kilogram of body weight daily. Drinking water leads to weight loss: You might have heard about losing weight by eating meat (high-protein diet or no-carb diet), which can reduce your weight by several kilograms in a short period. This happens because a high-protein diet produces a lot of protein metabolic waste (like urea). Additionally, due to the lack of carbohydrates in such diets, fat cannot be fully burned, leading to the production of fat metabolic waste like ketones... This metabolic waste from protein and fat needs the body to consume a large amount of water to excrete it, thus causing a dehydrating and diuretic effect when using these diets. (Remember that the human body is about 50-60% water; if a 60kg person loses just 5% of their water, that's 3kg. This is why weight loss can be so rapid >_<) Therefore, a significant portion of the weight lost through high-protein dieting is water. This is also why your measurements might only change as if you lost two to three kilograms, even though your weight dropped by three to five kilograms. Furthermore, after stopping these dieting methods, the weight quickly returns. It can't really be called regaining weight, as it might just be the cessation of dehydration and diuretic effects, with water returning to the body.