There’s no solid evidence for this, and it’s one of those bits of fragrance folklore that sounds plausible but doesn’t really hold up. Perfume longevity comes down to skin type, the formula’s concentration, and the ingredients used, not your hydration levels.

Where the idea comes from

Well-moisturised skin does hold fragrance slightly better than very dry, flaky skin, because dry skin can absorb oils unevenly and cause a scent to fade patchily. People have understandably extended that to “drink more water and it’ll last longer”, but internal hydration and skin surface condition aren’t the same thing. Applying a moisturiser to the skin directly before spraying does more for longevity than a glass of water ever will.

What actually moves the needle

  • Using an unscented moisturiser on pulse points before applying perfume
  • Choosing a higher concentration, eau de parfum over eau de toilette, if longevity matters to you
  • Applying to skin rather than just clothing, since skin’s warmth helps a fragrance develop properly

For the genuine factors behind how long a scent lasts, our perfume longevity guide is the one to read, alongside the complete guide to perfume for the basics.