That sounds like one of those “see more” health claims that usually oversimplify things.
Drinking water on an empty stomach—like first thing in the morning—is generally fine and can help you rehydrate after sleep. Your body has gone hours without fluids, so a glass of water can support normal functions like digestion, circulation, and temperature regulation.
But there’s no strong scientific evidence that it has special detox powers, causes major weight loss, or dramatically boosts metabolism beyond what staying hydrated already does. The body already handles detox through organs like the kidneys and liver.
If you’ve seen a specific claim (like “flushes toxins,” “burns fat faster,” or “cures diseases”), tell me what it said—I can break down whether it’s accurate or just internet hype.