When I eat more veg, I need less salt and water
I know it sounds obvious but when I eat a ton of veg, particularly cruciferous veg, I need less salt and water and am generally less dehydrated. I'm not talking a pathetic little side salad, I literally eat a whole head of broccoli with lunch and another one for dinner lol (steamed and seasoned lightly with olive oil, salt and pepper 😘👌 Also recommend chopped red cabbage, raw with the same dressing). When I eat like this, I can drink 1/2 a gallon (2L) of water instead a whole gallon (4L) and feel fine.
I know a lot of people can't eat that much fibre at once but I gradually increased to that amount over time because I kept noticing how much better I felt. I also love vegetables so that helps.
I know everyone has different dietary needs/difficulties but just sharing in case it helps someone.