Le Sérum Régénérant Intime is Eau de Nuit's hero product, a first-of-its-kind intimate serum built on genuine biotech innovation. Our proprietary Biomimetic Renewal Complex®, developed from the ground up in Switzerland, brings cellular-level science to a part of the body that has long been overlooked by high-performance skincare. 

Le Sérum is for external use only. It is applied to the vulva and surrounding external intimate skin and is not intended for internal use. 

Most intimate care products are designed around hygiene or fragrance. Le Sérum works at a fundamentally different level, focusing on barrier support, microbiome compatibility, and skin vitality using the same scientific rigor applied to the most advanced facial serums. It is the first product to bring this depth of biotech innovation, including a biomimetic swiss vegan glycogen-based microbiome architecture, to intimate skincare.

Intimate skin is biologically distinct: thinner, more hormonally sensitive, and home to a delicate microbiome with a specific pH range that conventional skincare actives can disrupt. Formulating for this area requires a level of precision and specialization that standard facial or body products are simply not designed to provide.

We recommend consulting your healthcare provider before introducing any new skincare product during pregnancy or while breastfeeding, as a precaution. 

Yes. Le Sérum is formulated with intimate skin's inherent sensitivity in mind, free from fragrance, alcohol, and ingredients that can disrupt pH or compromise the microbiome, and tested for use on the body's most reactive skin.

Le Sérum is free from parabens, endocrine disruptors, and ingredients known to compromise the vaginal microbiome or pH balance. It is formulated with the precision expected of Swiss biotech: every ingredient is there for a reason.

Apply 1–2 pumps to the vulva and surrounding external intimate skin as part of your morning and evening skincare ritual. Consistent daily use delivers the most meaningful results, skin barrier support, microbiome balance, and hydration all improve progressively with continued use.