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Ruisseau— de Lune —
Editorial still life of laboratory glassware, droppers and botanical sprigs on cream linen

Ingredient Library

A closer look at the ingredients behind your ritual

Explore the humectants, botanical extracts, oils, peptides, exfoliants and skin-supporting ingredients used across our formulas. Each one is explained in simple language so you can shop with confidence.

Our Philosophy

Transparency is part of the ritual

At Ruisseau De Lune, ingredient transparency is part of the ritual. We highlight the actives, botanicals, humectants, oils and supporting formula ingredients used across our products so you can understand what you are putting on your skin.

Every ingredient here appears in a product we sell. Nothing invented, nothing embellished — the same names printed on the carton and the bottle, grouped by their role in the formula.

Patch test before first use.
Review the full ingredient list if you have known sensitivities.
Use sunscreen during the day when using exfoliating acids.
Provided for transparency and education — not medical advice.

Featured Ingredients · Key Actives

The signature actives

Niacinamide — editorial ingredient visual

The Equilibrium Active

Niacinamide

A multitasking form of Vitamin B3 that refines, calms and clarifies.

Visibly reduces pore appearance

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Kojic Acid — editorial ingredient visual

The Clarifying Brightener

Kojic Acid

A naturally derived brightener that gently fades stubborn pigmentation.

Targets stubborn dark spots

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Hyaluronic Acid — editorial ingredient visual

The Reservoir

Hyaluronic Acid

A hydration molecule that holds up to 1000× its weight in water.

Restores immediate plumpness

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Ceramides — editorial ingredient visual

The Architecture

Ceramides

The lipid mortar that holds your skin barrier together.

Repairs a compromised barrier

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Peptides — editorial ingredient visual

The Messengers

Peptides

Short amino acid chains that signal younger-looking skin behaviour.

Improves firmness over time

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Retinol Alternative — editorial ingredient visual

The Gentle Renewal

Retinol Alternative

Plant-derived bakuchiol — the considered alternative to retinol.

Smooths fine lines without irritation

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Vitamin C — editorial ingredient visual

The Luminosity Active

Vitamin C

The most studied antioxidant in skincare — the source of true radiance.

Defends against environmental damage

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Rosemary Oil — editorial ingredient visual

The Scalp Ritual

Rosemary Oil

A botanical oil traditionally used in scalp care rituals and studied for its role in supporting healthier-looking hair.

Invigorates the scalp

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Botanical Oils — editorial ingredient visual

The Nourishment

Botanical Oils

Cold-pressed plant lipids that restore suppleness and a lit-from-within glow.

Restores overnight suppleness

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Transparency · Full Index

All Formula Ingredients

Every ingredient found across the Maison's verified product data, grouped by role in the formula. Featured actives link through to a full library entry; minor ingredients are shown by name and category for transparency.

111 of 111 ingredients

A full INCI list is displayed on each product page where verified. Where a verified list is not yet published online, please refer to the printed carton and bottle before use.

Explore the Maison (57 rituals) →