The science
The gommage mechanism is physicochemical rather than keratolytic. Cellulose and the acrylates/C10-30 alkyl acrylate crosspolymer form a viscous gel that, when sheared against dry skin, undergoes phase separation and aggregates into visible rolls; studies and demonstrations of the format show that the rolls form equally on inert surfaces and consist predominantly of the polymers themselves, with skin surface lipids, loose corneocytes and debris incorporated during rubbing. Exfoliation therefore arises mainly from the mild mechanical friction of the massage, with corneocyte removal measurably lower than that of particle scrubs and far lower than that of hydroxy-acid peels. Lactobionic acid, a polyhydroxy bionic acid with a large, highly hydroxylated structure, penetrates slowly and produces gentle desquamation with minimal stinging and barrier disruption in comparative studies against glycolic acid, and has humectant and antioxidant-chelating properties; its low list position and the one-minute rinse-off contact limit its contribution to a slight surface loosening. Protease retains some proteolytic activity in this hydrated, buffered gel and may cleave superficial corneodesmosomal proteins during the massage, again modestly.
The supporting ingredients are chosen for tolerance. Glycerin, dipropylene glycol, butylene glycol and propanediol supply humectancy during and briefly after the rinse; the eight hyaluronate species, spanning molecular weights and including cationic and acetylated forms with some substantivity, provide slip that reduces friction damage and a modest post-rinse plumping; panthenol, allantoin and dipotassium glycyrrhizate are established soothing agents that mitigate the erythema mechanical exfoliation can cause. Sea water contributes minerals without a plausible rinse-off effect, biosaccharide gum-1 adds a light film, and glycereth-25 PCA isostearate is a mild emollient-emulsifier that helps the rolls rinse. Preservation uses 1,2-hexanediol, caprylyl glycol, pentylene glycol, ethylhexylglycerin and hydroxyacetophenone, a system free of the common preservative allergens; tromethamine buffers the pH. The formula contains no fragrance, alcohol, oils or particulate abrasives. The tolerance risks are those of any mechanical exfoliation, aggravation of inflammatory acne, rosacea or a compromised barrier with pressure or overuse, and are lower here than in most of the category. The brand's double-exfoliation and mineral claims derive from unpublished Korean consumer testing; no independent study of the product exists.