The Science

Why your soap stopped working around 40

It's not you — it's nonenal. Here's what changes in your skin chemistry with age, why regular soap can't wash it away, and how persimmon tannin does.

Nonenal, in three steps

01
Nonenal forms on the skin

From around age 40, shifting hormone levels cause skin lipids to oxidize into 2-nonenal — a fatty odor compound with a persistent, greasy-grassy smell. Production increases with age, regardless of hygiene.
02
Regular soap washes around it

Nonenal isn't water-soluble and binds to skin and fabric. Ordinary cleansers lift away sweat and bacteria but leave nonenal behind — and deodorants only layer fragrance on top of it.
03
Persimmon tannin breaks it down

Tannin from Japanese persimmon (Diospyros kaki) chemically binds to nonenal and neutralizes it on contact — a method used in Japanese bathing culture for centuries, now delivered in a daily bar.

Every ingredient earns its place — one active, a moisturizing base, nothing to mask with.

Helps neutralize age-related odor for a fresh, confident feel — tannin that targets nonenal at the source.

Gently cleanses while helping maintain moisture, and nourishes dry skin so it feels soft after every wash.

Draw in moisture and support a gentle, skin-comforting cleanse — no synthetic fragrance or dyes.

No masking, no overnight miracles — just a measurable difference within two weeks of daily use.

Self-assessment study, 124 participants aged 42–68, daily use for 4 weeks.

1 Day 1

Clean, without the cover-up

Persimmon tannin starts neutralizing nonenal and odor compounds on first contact — you rinse off clean, not perfumed.
2 Day 7

Odor stops returning

With daily use, odor-prone areas — underarms, feet, intimate skin — stay fresh between washes instead of rebuilding by evening.
3 Day 14

Confidence, sustained

In our study, 92% noticed less body odor by two weeks. Skin feels softer too, thanks to shea butter and olive oil.

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