Round Lab

Birch sap's naturally occurring xylitol functions as a humectant while malic acid (a gentle AHA) provides mild daily exfoliation — a combination not found in any synthetic humectant; the sap's mineral complexity (manganese, zinc, potassium) also activates antioxidant enzyme systems within keratinocytes.

Using birch sap instead of water as the primary solvent means this toner delivers minerals and amino acids at every application; the malic acid content provides daily micro-exfoliation at a non-irritating concentration, maintaining surface smoothness without a dedicated exfoliation step.

At 70% birch juice concentration, the cream's humectant-rich sap base hydrates from within while ceramide NP reconstructs the intercellular lipid matrix — addressing barrier dysfunction at both the cellular hydration and structural lipid levels simultaneously.

Dokdo Island's volcanic mineral water carries trace elements — iron, magnesium, silica, zinc — at concentrations not found in standard spring water; these minerals activate the skin's metalloenzyme antioxidant systems (superoxide dismutase, catalase) that form the first line of defense against UV and pollution stress.