I never paid much attention to drinking enough water. You assume your body asks for liquid and you respond. Some water, some tea, a zero drink here and there. But I noticed something about myself: that mechanism doesn't work very well in me. I'm often thirsty, maybe under-hydrated, and the signal doesn't arrive clearly.
When hunger might be thirst
My own suspicion, and I'll keep it as a suspicion, is that I sometimes read thirst as hunger. Instead of "drink something," the feeling shows up as "eat something." I can half-explain it to myself: food carries water too, so maybe my body takes the shortcut and asks for the thing that delivers both. I can't prove that. What I can say is the practical move that came out of it: when hunger shows up at an odd time, I drink a large glass of water and wait fifteen minutes before deciding. Often the feeling was gone, and I'd have eaten for nothing.
Zero drinks as a tool
Zero drinks were something I leaned on heavily during my big weight-loss stretch. Opinions on them are mixed; some people find artificial sweeteners make them crave sweets or carbs. That wasn't my experience, but it might be yours, so pay attention to your own response. For me they helped manage hunger, even during long fasting sessions. I'd keep them cold and on hand, and take them in small amounts across the day, one little dose, then a gap, then another. That paced approach is what got me through long stretches without food. I'd put them in your toolbox and let you judge.
Coffee, and a question mark
Coffee is the one I'm least sure about. Plenty of people say it dehydrates you because of the caffeine. In my case it never made me thirsty. It may have made me hungry, or done something else I can't name. I genuinely don't know the mechanism. The point worth flagging is the stack: if you're already not drinking enough, and you're maybe leaning on food for liquid, adding a lot of coffee on top can add up over weeks. That was my experience, not a rule about yours.
I'm not telling you what's happening in your body. I'm telling you what I learned to check in mine. The habit that stuck: when something feels off, pause and investigate before you assume it's the food, the metabolism, or your willpower. Drink a glass of water. Wait. Then decide. Sometimes the answer is simpler than you'd think.
