OoxaO 40 ml bottle with the cap open and a drop of lubricant

engineered to mimic the body's own balance.

the formulation premise

OoxaO is not a lubricant with added ingredients. The science is the product. Three formulation principles in one water-based formula.

285–295

mOsm/kg · iso-osmolar

10,000D

low-molecular HA

pH 4.5

postbiotic care

Formulation Dr. Kenji Murakami Mucosal tissue · Osmotic balance · Body-compatible care

01 Osmolality

balanced for both bodies.

Formulated at 285–295 mOsm/kg — within the body's own fluid range, so the glide feels balanced for both partners.

Osmolality Comparison · mOsm/kg

OoxaO sits inside the body's natural range, far below the WHO-recommended level of 380.

79%^* fertility-conscious compatibility

What is Osmolality

How concentrated a fluid is — high-osmolality formulas can draw moisture from delicate tissue.

02 Hydro-WetLock™

long-lasting moisture that feels like skin.

10,000D sodium hyaluronate — a low-molecular-weight HA, around 500× smaller than standard lubricant molecules.

Clear OoxaO gel flowing over a 40 ml bottle

213%^* higher moisture retention

What is Hyaluronic Acid

A water-binding molecule — the smaller form keeps the glide light, not gel-heavy.

HA Molecule Size · Relative Scale

10,000D HA — 500× smaller HA molecules fill microscopic gaps between skin surfaces, creating a hydrated slip layer without the heavy gel feel.

03 pH 4.5 · Postbiotic

pH Scale · Vaginal Environment

The vaginal environment is naturally mildly acidic (pH 3.8–4.5). OoxaO's pH 4.5 aligns precisely.

care that continues long after intimacy.

Formulated at pH 4.5 with Lactobacillus Ferment Lysate — an active postbiotic supporting microbiome-conscious care in a stable, leave-on format.

pH-aligned. Postbiotic-supported. No-wash-off leave-on care.

01. 77%^* reduction in itchiness
02. +57%^* beneficial Lactobacilli count
03. −21%^* decrease in BV-associated bacteria

real couples. real comfort. real pleasure.

OoxaO's science story is supported by internal product data across moisture retention and intimate microbiome comfort.

0%^*

of customers reported no painful sexual intercourse.

0%^*

of users felt improved satisfaction during intimacy.

0%^*

of couples reported an enhanced sexual experience.

everything you need. nothing you don't.

Clean Formula

Nothing that works against you.

OoxaO avoids the choices that make lubricants sticky, hyperosmolar, or biologically mismatched.

No glycerin. No parabens. No alcohol. No propylene glycol. No artificial fragrance. No hormone-disrupting agents.

Compatibility

Made for every moment.

Engineered to work seamlessly with the products and bodies that matter most.

Latex-safe
Toy-safe
Water-based
Transparent
Fragrance-free
Flavorless
Non-greasy
No wash-off

Third-Party Tested

GMP-certified, independently verified.

Manufactured in a GMP-certified facility. Verified against the standards that matter most.

Arsenic · Cadmium · Mercury: Not Detected Lead: 0.0128 mg/kg Batch WDU2512 · Lab ID 25-314996-1

View Full Lab Report →

OoxaO 40 ml retail box, Active Postbiotic

our story.

Eleven years of innovation. From Osaka research to Kyoto refinement.

read our story →

shop OoxaO.

Bio-mimic glide. Clean aftercare. Feel everything, risk nothing.

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* Performance claims footnote. Statistics marked with an asterisk: 79%, 213%, 98%, 95% and 88% are based on OoxaO internal product testing and brand-supported product data; methodology details available on request. 77%, 57% and 21% are from a published clinical study on postbiotic gels (PMC9936311), not OoxaO product testing. OoxaO is an intimate wellness product, not a medical treatment. pH and osmolality ranges referenced are formulation specifications. Vaginal pH and microbiome references cite published clinical literature and WHO/UNFPA guidance on personal lubricant specifications.