Neutralize the Odor
Scrubbing harder doesn't fix it. Here's why.
2‑Nonenal isn't sweat — it's an aldehyde that bonds to the oil in your skin, concentrated right behind your ears and along the back of your neck. Water can't break that bond, no matter how long you stand in the shower.
Persimmon tannin does what soap can't: it binds directly to 2‑Nonenal and pulls it out at the source.