The Complete Intimate Skincare Ingredients Glossary

Every product in the NUCLID line replaces its water base with a specific fermented botanical extract, and each one is chosen for a distinct feel rather than being interchangeable. This glossary breaks down every single one in plain language, in one place. New to the category entirely? Start with our plain-language guide to what feminine wellness actually means. For the bigger picture of how this ingredient philosophy fits into the category as a whole, see our complete guide to external intimate care.

Lactobacillus Ferment Extract

Found in: Relief Inner Clean Foam

A fermented extract used at high concentration in place of water, chosen for a rich, non-stripping foaming cleanse. This is one of the most widely used fermented actives across Korean skincare broadly, valued for how well it tends to sit with skin.

Rhus Semialata Stem Extract Ferment

Found in: Balancing & Briller Clean Tissue

Also known as Chinese sumac, this fermented extract is chosen for a brightened, clarified feel, the ingredient behind why this particular tissue reads as the more energizing option in the line. Full deep-dive here.

Phragmites Communis Root Extract Ferment

Found in: Moisturizing & Calming Clean Tissue

Derived from the common reed plant, this fermented extract is formulated specifically for a soft, soothing feel, the gentler counterpart to Rhus Semialata in the tissue lineup. Full deep-dive here.

Hinoki Cypress Extract

Found in: Refresh Inner Clean Gel

A traditional Japanese cypress variety, used here as the water-replacement base for the line's gel-format wash. Chosen for a lighter, smoother cleansing feel than the foam's richer lather, paired with a woody-sandalwood-floral scent. How it compares to the foam.

Gold Hibiscus Extract

Found in: Relief Inner Pure Mist

Chosen for a floral, jasmine-forward scent profile, this extract anchors the brighter, more daytime-leaning of the line's two mists. How the two mists compare.

Cypress Extract

Found in: Refresh Inner Calming Mist

A woodier, more grounding counterpart to gold hibiscus, this extract is the base of the line's evening-leaning mist option, often preferred when a bright floral scent feels like too much.

PDRN

Found across multiple products in the line (both washes and both mists), PDRN is included specifically for its role in skin comfort and moisture, part of what keeps these formulas from feeling like a typical stripping or purely functional product.

The Common Thread Across All of Them

Every single ingredient on this list replaces water as the formulation base, rather than being added on top of one. That's the actual differentiator running through the entire NUCLID line, and it's a big part of what separates this formulation philosophy from what's typical on a US drugstore shelf.

Continue reading: What Is Rhus Semialata? · What Is Phragmites Communis?

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