The aging-odor soap that keeps receipts.
Around 40, skin starts producing (E)-2-nonenal — the compound behind that persistent "older" body odor deodorant can't fix. Vensoll neutralizes it with fermented persimmon tannin. The difference: we're publishing the sourcing, the fermentation process, and the lab verification behind it — in the open, as each piece is confirmed, not after the fact.
$19.99 for one bar · $44.97 for three ($14.99 each) · free shipping over $35
- 30 days — keep the bar
- Free shipping over $35
- Plain, unbranded packaging
One compound. One real fix.
This isn't generic "body odor." It's a single molecule — and persimmon tannin is one of the few things shown to bind it, not just cover it up.
What is nonenal?
Around age 40, skin oils start oxidizing differently and produce (E)-2-nonenal — a grassy, greasy-smelling compound. It's the reason "older" skin can smell different, regardless of how often you shower.
Why deodorant fails
Antiperspirants target sweat and armpits. Nonenal forms across the whole body. Fragrance masks it for an hour; it doesn't neutralize it.
Why persimmon tannin
Kakishibu (fermented persimmon) tannin chemically binds nonenal and carries it away in the lather.
See our verification progress →From skin chemistry to a bar that binds it
Aging-related body odour isn't about washing less — it's a specific compound. Here's the chain, and why persimmon tannin is the piece ordinary soap skips.
Skin produces fatty acids
From around 40, skin lipids change and produce more surface fatty acids — the raw material for aging-related odour.
Oxidation speeds up after 40
Those lipids oxidise differently than they used to, forming (E)-2-nonenal — a compound ordinary soap doesn't bind.
Nonenal is released
The grassy, greasy smell isn't sweat or poor hygiene — it's this molecule, produced continuously across the body.
Persimmon neutralizes it
Fermented kakishibu tannin binds nonenal on contact so it rinses away with the lather — not masked by fragrance.
- Built for underarm sweat — not whole-body nonenal
- Fragrance covers odour for an hour, then it returns
- No published tannin content or lab verification
- Often uses unfermented extract, low on the ingredient list
- Full-body daily lather — chest, back, neck, behind the ears
- Fragrance-free — binds nonenal, not a cover-up scent
- Named kakishibu fermentation process — not raw extract stirred in
- Public verification ledger — lab analysis not started yet, published either way when it is
Every rival makes claims. We're building a paper trail instead.
The category leaders advertise "97% tannin" and "patented fermentation" — with no lab report, no certificate, no documentation you can actually read. Most of the category sources the same commodity extract from the same handful of suppliers and repackages it behind better photography.
Vensoll is doing the opposite: naming our fermentation process, commissioning independent testing, and publishing exactly what we find — good or inconvenient. This ledger is the live record.
Not commissioned yet. When we do, the lab and testing method will be named here first — then the result, whatever it says.
Comparing extract suppliers for a documented fermentation duration.
Requiring certificates of analysis and origin documentation before any supplier is confirmed.
Full INCI list available on every product page at launch.
We got tired of labels that don't add up
Every persimmon soap on the market makes the same claims — a high tannin percentage, traditional fermentation, real results. Look closely and almost none show a lab report, a testing method, or a full ingredient list.
Vensoll started as a simple bet: people dealing with a genuinely frustrating problem would rather pay a fair premium for a brand that shows its work than a lower price for one that doesn't.
Not the cheap one. Not the expensive one either.
Generic bars are cheap because they cut the tannin and skip the testing. The established premium brands charge more than we do, lock their best per-bar price behind a subscription — and still won't show you a lab report.
| Vensoll | Premium rival | Generic / marketplace | |
|---|---|---|---|
| Money-back guarantee | 30 days — keep the bar | 30 days — ship it back | Varies |
| Subscription required for the best price | No — one price, no commitment | Yes | — |
| Lab report you can actually read | Not started — published either way | Claimed, not shown | None |
| Documented fermentation process | In progress | ✗ | ✗ |
| Publishes a live verification record | ✓ | ✗ | ✗ |
| Targets nonenal specifically | ✓ | ✓ | Sometimes |
| Price per bar | $19.99 ($14.99 on 3-pack) | $27 (or $18 on subscription) | $6–16 |
There are no reviews yet. Here's what you get instead.
We haven't shipped long enough to have a wall of five-star quotes — and we're not going to invent ones. Here's exactly what joining the founding batch actually gets you.
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Founding price, locked in
Order from the founding batch and we'll honour this price on your reorders, even after we publish full lab results.
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First look at every result
Founding customers get lab reports and sourcing documentation by email the moment they're confirmed.
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A direct line to us
Reply to any email and reach the person actually running the verification work.
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A full month to decide
30 days on your first order, and you don't post anything back — one claim per customer.
Get 10% off + the ledger updates
Join the list for early access, the nonenal explainer, and an email the moment each verification item above is confirmed.
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Persimmon Tannin Bar — Soap for Age-Related Body Odor
Deodorant was never going to reach this.
After 40, skin produces (E)-2-nonenal. It isn't sweat — so antiperspirant misses it, and ordinary soap doesn't bind it.
Fermented Japanese persimmon tannin does. Kakishibu binds nonenal and carries it off in the lather, instead of layering scent on top of it.
- Fragrance-free — you smell like nothing, not like cover-up
- Full body, daily — chest, back, neck, behind the ears
- 100g bar — pH-balanced, vegan
- 60-day guarantee on your first order — keep the bar, we refund you anyway
Full ingredients: Saponified plant oils (olive, coconut, shea butter), fermented Japanese persimmon (kakishibu) tannin extract, green tea polyphenols, glycerin, water. No synthetic fragrance, no parabens, no sulfates. Vegan and cruelty-free.
- Free shipping over $35
- 30 days — keep the bar
- Plain, unbranded packaging
- Neutralizes nonenal — binds the molecule, not a fragrance cover-up
- Full-body & daily — pH-balanced, non-stripping lather
- Verification in progress — the only bar in the category publishing its testing at all
The skeptic's questions
Because the $8 bars cut the one thing that does the work. Cheap listings use a small amount of unfermented persimmon extract, low on the ingredient list, and none publish a tannin percentage or a lab report.
We're also not the expensive end of this category — the established premium brands sit above us, and reserve their best per-bar price for people who commit to a subscription. We don't.
Kakishibu tannin binds nonenal on contact, so it works from the first wash rather than building up over time. We're not going to put a number on how quickly you'll notice — that's exactly the kind of claim we can't back yet, and you have 30 days to decide for yourself.
Not at all — nonenal affects men and women equally. Most of the category is marketed toward women 55+, which is a marketing choice, not a chemistry one.
And if you're buying this for someone else: it ships in plain, unbranded packaging. Nothing on the outside says what it's for.
Free shipping on orders over $35 to Canada and the United States.
Every first order is covered by our 30-day money-back guarantee: if it doesn't work for you, email us within 30 days of delivery and we refund you in full — you don't need to send the bar back. One guarantee claim per customer.
Try it for 30 days. Keep it only if it works.
Start with a single bar at $19.99, or take three at $14.99 each ($44.97 total). If your first order doesn't do what we say, email us and we refund you in full — you don't need to post anything back.