The science
The cleanser's effective components are its surfactant system and its abrasive, and the two pull in different directions. Sodium cocoyl glycinate is an amino-acid surfactant with published comparisons showing lower protein denaturation, less lipid removal and smaller increases in transepidermal water loss after washing than sulfate systems, and coco-betaine is a mild amphoteric co-surfactant that boosts foam and further reduces irritation potential; with glycerin fourth, the base is among the gentlest available and would justify twice-daily use on most skin. Perlite, sixth, is an expanded amorphous aluminosilicate glass with hard, angular particles; ground fine, it removes loose corneocytes efficiently, and studies of physical exfoliants consistently show that hard, angular particles produce greater increases in water loss and erythema than soft or spherical ones for a given pressure, with effects that accumulate with frequency. Daily use of a hard abrasive is tolerated by sebaceous, resilient skin and is a recognised route to barrier disruption on dry, thin or atopic skin, which is consistent with the tightness reported by a share of reviewers.
The brightening and clarifying ingredients are present at levels and contact times that preclude activity. Salicylic acid listed after the preservatives in a rinse-off is a trace with no keratolytic effect; the leave-on evidence for salicylic acid at 0.5 to 2 percent over weeks does not transfer to a thirty-second wash. Hydroxypropyl tetrahydropyrantriol has clinical data for supporting glycosaminoglycans and the dermal-epidermal junction from leave-on use over months, and none from a cleanser. Citrus aurantium tachibana peel extract and Paeonia suffruticosa root extract carry in-vitro antioxidant and tyrosinase-related findings at concentrations and durations unrelated to a rinse-off. The visible freshness after washing is the optical effect of oil removal and surface exfoliation and is transient.
Lavender oil, with linalool declared, is the formula's sensitisation risk; linalool and its oxidation products are among the most frequently identified fragrance allergens in patch-test series, and exposure on freshly abraded skin is higher than on intact skin. Propylene glycol is a minor irritant for a small minority. The absence of sulfates, alcohol and silicone is consistent with the gentle-base claim. No clinical study of this product has been published beyond the brand's dermatologist-tested safety statement.