# Kiyo Clinical — full markdown corpus > Concatenated clean markdown for answer engines. Prefer llms.txt first when context is tight. Citation-ready facts: - **Product:** Kiyo Clinical Persimmon Deodorizing Soap — a wash-off bar, not a deodorant or perfume. - **Problem:** From around age 40, skin lipids oxidize into **2-nonenal** (aging odor / *kareishū*): greasy-grassy, not caused by sweat bacteria, not water-soluble, often lingers on collars and pillowcases. - **Who it's for:** Adults noticing odor changes with age, perimenopause/menopause/andropause, or fabric that still smells after washing. - **Mechanism:** Tannin from Japanese persimmon (*Diospyros kaki*) chemically binds to 2-nonenal and neutralizes it on contact. - **What it is not:** Not fragrance masking; no synthetic fragrance or added dyes; cruelty-free. - **Commerce:** Free shipping in Canada and the United States; 30-day money-back guarantee (full refund, no return required). - **Contact:** hello@kiyoclinical.com · https://kiyoclinical.com --- # Persimmon Deodorizing Soap > Japanese persimmon extract soap for nonenal and age-related body odor. Fragrance-free, pH-conscious, with shea and olive. ## What it does - Eliminates nonenal — the odor compound linked to hormonal change - Helps with everyday body odor (underarm, body, feet) - Moisturizes with coconut oil, olive oil, glycerin, sorbitol, and sucrose - No synthetic fragrance or added dyes ## Key ingredients - **Persimmon extract** — Helps neutralize age-related odor for a fresh, confident feel - **Coconut oil** — Gently cleanses while helping maintain moisture - **Olive oil** — Nourishes dry skin and leaves it feeling soft - **Glycerin / sorbitol / sucrose** — Draw in moisture for a gentler cleanse ## Why Kiyo Clinical vs knockoffs Plenty of marketplace "persimmon" bars exist. Few use a standardized, verified tannin dose — which is what actually neutralizes nonenal. Kiyo Clinical is built for that mechanism, not fragrance masking. ## Guarantee & shipping - Free shipping on every order (Canada & US) - 30-day money-back guarantee — not fresher in 30 days? Full refund, no return required - Shop: https://kiyoclinical.com/products/persimmon-odor-defense-bar --- # Body odor changes with age. Your soap should too. > Fragrance-free persimmon soap that neutralizes nonenal — the stubborn odor regular soap can't wash away. Softens skin with natural oils. Kiyo Clinical makes the only soap with persimmon extract to neutralize nonenal so you stay fresher with age. Crafted with natural ingredients, made for every body. ## Why persimmon works 1. **Fresher with age** — Persimmon helps eliminate nonenal (the odor compound tied to hormonal change), plus everyday armpit, vaginal, and foot odors. 2. **Gentle & effective** — Shea butter, olive oil, and green tea leave skin moisturized and soft. 3. **Feel confident** — One daily lather keeps you fresh from morning meetings to evening runs. ## Product - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) — from $24.99, free shipping, 30-day money-back guarantee - [The Science](https://kiyoclinical.com/pages/science) — how nonenal forms and how tannin neutralizes it - [Nonenal quiz](https://kiyoclinical.com/pages/quiz) — 30-second check ## Brand facts - Brand: Kiyo Clinical - Active: Japanese persimmon (*Diospyros kaki*) tannin - Fragrance-free, no added dyes, cruelty-free - Ships free in Canada and the United States --- # 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. ## Inside the bar - Persimmon extract — targets nonenal at the source - Coconut & olive oil — cleanse while maintaining moisture - Glycerin, sorbitol & sucrose — skin-comforting cleanse - No synthetic fragrance, no added dyes, cruelty-free, quality-tested ## Next - [Shop Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) --- # What is nonenal? The age-related body odor no one warned you about ## The short answer 2-nonenal is an odor compound your skin starts producing from around age 40. As hormone levels shift, the fatty acids on your skin's surface oxidize more easily — and one of the byproducts is nonenal, which has a persistent, greasy-grassy smell. In Japan, where it was first identified, it's known as *kareishū* — often translated as "aging odor." Two things make nonenal different from ordinary body odor: it isn't caused by sweat or bacteria, and it isn't water-soluble. That's why it can linger on collars, pillowcases, and skin even with careful hygiene. ## Why it starts around 40 With age — and especially with hormonal transitions like perimenopause, menopause, and andropause — skin produces more omega-7 fatty acids while its natural antioxidant defenses decline. When those fatty acids oxidize, nonenal forms. This is a normal change in skin chemistry, not a hygiene problem. ## How to tell if you have it - Your body odor has changed in character since your 40s — less sharp, more "greasy" or "musty." - The smell lingers on pillowcases, hats, and shirt collars even after washing. - Deodorant doesn't seem to address it — because it forms on skin all over the body, not just underarms. - You notice it most behind the ears, on the chest, back, and scalp. ## Why regular soap and deodorant don't work Ordinary cleansers remove sweat, dirt, and bacteria. Nonenal binds to the skin's lipid layer and resists rinsing. Deodorants and fragrances layer scent on top, which can make the combination worse. ## What actually works: persimmon tannin Tannin extracted from Japanese persimmon (*Diospyros kaki*) chemically binds to nonenal and neutralizes it on contact. Used daily in a wash-off format, it removes the compound at the source rather than masking it. ## A simple routine 1. Wash daily with a persimmon-tannin soap, focusing on chest, back, behind the ears, and other odor-prone areas. 2. Let skin dry fully before dressing — nonenal clings to damp fabric. 3. Wash bedding and collars regularly in warm water. 4. Be patient: most people notice a difference within one to two weeks of daily use. ## Product - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) - [The Science](https://kiyoclinical.com/pages/science) --- # How to get rid of nonenal: a practical guide to age-related body odor Looking for how to get rid of nonenal or aging body odor? Skip the fragrance stack. Getting rid of it means neutralizing the molecule on contact, then keeping fabric and skin from re-accumulating it. ## Practical steps 1. Wash daily with persimmon-tannin soap 2. Dry skin fully before dressing 3. Wash collars, hats, and bedding regularly 4. Give it 1–2 weeks of consistent use ## Related - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) - [The Science](https://kiyoclinical.com/pages/science) - [Shop the soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Shipping Simple, free, and discreet. - Free shipping on every order in Canada and the United States — no minimum - Orders leave within 1–2 business days; most arrive in 3–7 business days after shipping - Discreet packaging — plain outer boxes Questions: https://kiyoclinical.com/pages/contact --- # Returns & guarantee - **30-day money-back guarantee** — Not fresher within 30 days of delivery? Full refund, no return required - Email hello@kiyoclinical.com with your order number - Subscriptions: skip, pause, change pack size, or cancel anytime — no fees --- # Learn Straight answers about body odor, skin chemistry, and aging — backed by the science behind our persimmon soap. ## Articles - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) — The age-related body odor no one warned you about - [Menopause and body odor](https://kiyoclinical.com/pages/menopause-body-odor) — Why it changes, and what helps - [How to get rid of nonenal](https://kiyoclinical.com/pages/how-to-get-rid-of-nonenal) — A practical guide to aging odor - [Why deodorant fails after 40](https://kiyoclinical.com/pages/why-deodorant-fails-after-40) — And what to use instead - [Best soap for age-related body odor](https://kiyoclinical.com/pages/best-soap-for-age-related-body-odor) — What actually works - [Body odor after 40](https://kiyoclinical.com/pages/body-odor-after-40) — Why it changes (and what helps) - [Does persimmon soap work for body odor?](https://kiyoclinical.com/pages/persimmon-soap-for-body-odor) — What the science says - [Why clothes smell like body odor](https://kiyoclinical.com/pages/why-clothes-smell-like-body-odor) — Even after washing ## Related - [The Science](https://kiyoclinical.com/pages/science) - [Nonenal quiz](https://kiyoclinical.com/pages/quiz) --- # Body odor after 40: why it changes (and what actually helps) Body odor after 40 often isn't "worse hygiene." Skin chemistry shifts, nonenal appears, and old routines stop working. Treat the compound — don't just cover it. - [The Science](https://kiyoclinical.com/pages/science) - [Shop Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Menopause and body odor: why it changes, and what helps Noticing a different body odor during perimenopause or menopause? You're not imagining it. Hormonal shifts increase sweat from hot flashes and accelerate the lipid oxidation that creates 2-nonenal — an age-related odor compound regular deodorant wasn't built for. ## What helps - Treat nonenal at the source with persimmon tannin soap, not louder fragrance - Focus cleansing on chest, back, scalp, and behind the ears — not only underarms - Keep bedding and collars clean; nonenal binds to fabric - See [How to get rid of nonenal](https://kiyoclinical.com/pages/how-to-get-rid-of-nonenal) for a full routine ## Related - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Why deodorant stops working after 40 — and what to use instead If deodorant suddenly isn't enough after 40, it may not be sweat. Aging skin produces nonenal that antiperspirants weren't built for. Nonenal isn't water-soluble and isn't caused by sweat bacteria, so spraying more deodorant rarely fixes it. ## What to use instead A fragrance-free persimmon tannin cleanser that neutralizes nonenal on contact — not a louder scent. - [How to get rid of nonenal](https://kiyoclinical.com/pages/how-to-get-rid-of-nonenal) - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Best soap for age-related body odor: what actually works The right bar isn't the strongest scent or the harshest scrub. It's the one whose active ingredient can bind 2-nonenal. Look for verified persimmon tannin, a moisturizing base, and no synthetic fragrance masking. - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Does persimmon soap work for body odor? What the science says Persimmon soap is popular for aging odor because tannin from *Diospyros kaki* binds to 2-nonenal on contact. Results depend on a real tannin dose, daily use, and fabric hygiene — not fragrance. - [The Science](https://kiyoclinical.com/pages/science) - [Persimmon Deodorizing Soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Why clothes and pillowcases smell like body odor — even after washing Freshly washed shirts and pillowcases still smell? Nonenal clings to fabric. Clear it from skin with persimmon tannin soap, wash bedding and collars regularly, and dry fully before dressing. - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) - [Shop the soap](https://kiyoclinical.com/products/persimmon-odor-defense-bar) --- # Nonenal check quiz A free 30-second yes/no quiz to see if age-related nonenal odor may be part of your body odor change. Take it here: https://kiyoclinical.com/pages/quiz ## Related - [What is nonenal?](https://kiyoclinical.com/pages/what-is-nonenal) - [The Science](https://kiyoclinical.com/pages/science) --- # Customer reviews Real results from people using Kiyo Clinical Persimmon Deodorizing Soap for nonenal and age-related body odor. - Reviews page: https://kiyoclinical.com/pages/reviews - Product: https://kiyoclinical.com/products/persimmon-odor-defense-bar --- # Contact Email: hello@kiyoclinical.com Site: https://kiyoclinical.com --- # Refer a friend Share Kiyo Clinical Persimmon Deodorizing Soap with friends. - Referral page: https://kiyoclinical.com/pages/refer - Product: https://kiyoclinical.com/products/persimmon-odor-defense-bar ## Commerce (UCP) - Store: https://kiyoclinical.com - UCP discovery: https://kiyoclinical.com/.well-known/ucp - MCP endpoint: https://kiyoclinical.com/api/ucp/mcp - Sitemap: https://kiyoclinical.com/sitemap.xml - Currency: USD - Agent manual: https://kiyoclinical.com/agents.md