Oryza Sativa Rice Lees Extract
What is Oryza Sativa Rice Lees Extract?
Oryza Sativa Rice Lees Extract is derived from the sediment leftover from sake fermentation, rich in amino acids, peptides, vitamins, and ferulic acid. It is widely used in Japanese skincare for its potent antioxidant and skin-brightening properties. This extract helps promote collagen production, improve skin elasticity, and provide hydration while gently exfoliating dead skin cells.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Moisturising
Improves skin hydration and comfort by combining water-binding (humectant) and barrier-supporting (emollient/occlusive) mechanisms to reduce dryness.
Skin protecting
Forms a barrier to protect skin from external irritants.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Tonic
Supports a light, toning after-feel—often combining mild astringency, refreshing solvents, and humectants—to prep skin and refine sensory finish.
Soothing
Helps reduce the feeling of discomfort and visible irritation by supporting skin calmness, often through anti-irritant, barrier-supporting, or cooling mechanisms.
Antioxidant
Slows oxidation of oils, fragrances, and sensitive actives to improve shelf life and reduce rancidity or color change; sometimes also supports skin protection from oxidative stress.