Tremella Fuciformis Sporocarp Extract

Tremella fuciformis (snow mushroom) sporocarp extract is primarily a humectant/film-forming polysaccharide used at low percentages in moisturizers and serums, and it is generally well-tolerated with a low rate of irritation in cosmetic use. While not an exfoliating active, botanical extracts can rarely trigger irritation or allergy in highly reactive or eczema-prone patients (including due to trace impurities or preservation systems), so it is not scored as inert. Overall, it fits "very gentle" for most sensitive skin when properly formulated. Safety Notes: In mass-market and prestige leave-on products (creams/lotions/toners/cleansers), Tremella fuciformis (snow mushroom) sporocarp extract is often used as a low-level label claim or supporting humectant at ~0.001–0.1%, especially when supplied in diluted glycerin/butanediol carriers. Dedicated hydrating serums/masks frequently place it in the 0.2–2% range, while a small number of consumer-available “high-strength” formulas using concentrated extract powders or high active-load blends reach ~3–5% in leave-on products before viscosity, tack, and stability constraints become limiting; rinse-off products generally sit at the low end due to reduced deposition time. No specific FDA/EU maximum applies, so the observed upper end is driven mainly by sensorial and formulation stability considerations rather than regulatory caps.