Your Questions,
Answered.

Hirudin, in the context of our formulations, refers to a rare, precision-formulated bioactive ingredient that has been the focus of decades of independent research — prized for its unusual properties long before it was considered for a vanity. We built our entire collection around this single ingredient, sourced and prepared to exacting standards, because we believe a formulation this considered didn't need anything else competing for attention.

The Hirudin Serum is built around a single rare ingredient — a precision-formulated bioactive that has spent decades as the focus of independent research — at a considered 2% concentration, paired with only a small group of complementary botanicals. Rather than competing on the length of an ingredient list, we focused on getting one formulation exactly right: lightweight, fast-absorbing, and independently tested for tolerability and stability before release.

The serum settles like silk pulled taut — weightless and fast-absorbing, with a satin-luminous finish rather than a film or residue. It absorbs fully within moments of application and layers seamlessly beneath night creams, facial oils, or other formulations in your evening routine.

Apply in the quiet hour before sleep, after cleansing. Warm two to three drops between your palms and press gently into skin across the face, neck, and décolletage. Allow a moment for the serum to settle before layering a night cream or facial oil, if desired.

Our hero ingredient is sourced through carefully vetted, naturally derived channels and prepared to the same exacting standards as the independent research that first studied it. We work with established formulation and testing partners — including Eurofins CRL and LifeNet Health LifeSciences (Kalamazoo, MI) — to ensure consistency and quality from sourcing through to the finished formulation.

Yes. The Hirudin Serum is not tested on animals at any stage of formulation or development. Our independent testing program — including patch testing and skin irritation testing — is conducted using established human-subject and in-vitro testing protocols.