The science
The mask's primary effect is thermal. Erythritol, a sugar alcohol with a strongly negative heat of solution, absorbs heat as it dissolves in the essence's water and on damp skin, producing a genuine cooling sensation; a chilled sheet adds thermal mass, and surface cooling of inflamed skin produces vasoconstriction that reduces erythema and oedema for the duration of contact and shortly after, which is the mechanism of cold compresses in inflammatory acne and sunburn. The brand's description of a cooling mineral in the sheet is unverified. Dipotassium glycyrrhizate, a glycyrrhizic acid salt with documented anti-inflammatory activity, panthenol, with controlled evidence for barrier recovery and reduced irritation, and Centella asiatica leaf extract, with evidence for erythema reduction, extend the calming beyond the cooling. Glycerin, butylene glycol, dipropylene glycol and eight hyaluronate species, including dimethylsilanol hyaluronate and sodium hyaluronate dimethylsilanol, silanol-bound forms marketed for firming with supplier data only, provide humectancy and a surface film; hydrolysed and low-weight fractions penetrate the outer epidermis.
The vital complex is present at levels below its evidence. Niacinamide, in the lower half of the list, may reach a low but non-trivial concentration; nicotinamide mononucleotide has no meaningful topical clinical evidence; acetylneuraminic (sialic) acid is marketed for barrier and anti-ageing support on in vitro and supplier data; ascorbic acid at a trace in a pH-unspecified aqueous essence is unstable and inactive; tranexamic acid has evidence for pigmentation at 2 to 5 percent in leave-on use; copper tripeptide-1 has small studies in wound healing and photoageing at daily leave-on doses. In a twenty-minute cotton mask at trace positions none is expected to act. Allium cepa bulb extract, sixteenth, contributes quercetin and organosulfur compounds with in vitro anti-inflammatory activity; hydrolysed gardenia extract adds antioxidant crocins; adenosine supports a Korean functional wrinkle claim; tocopherol is an antioxidant; arginine and citrate-free buffering with carbomer set the gel; polyglyceryl-10 laurate solubilises; preservation uses 1,2-hexanediol, hydroxyacetophenone and ethylhexylglycerin with disodium EDTA. The cotton format loses essence within about twenty minutes and reverses hydration if left to dry. The formula is fragrance-free, alcohol-free, oil-free, fungal-acne-safe, vegan and suitable in pregnancy. The brand's testing is unpublished, and no independent study exists.