Poria Cocos Sclerotium Extract

Poria Cocos Sclerotium Extract is a fungal (mushroom) sclerotium extract used primarily for soothing/anti-inflammatory and barrier-support claims, typically at low concentrations in leave-on products. Available safety and patch-test experience for mushroom-derived polysaccharide-rich extracts suggests low irritancy overall, but as a biologically derived botanical/extract it carries a small, non-zero risk of contact irritation or allergy in highly reactive or eczematous patients. Given that sensitization to extracts can occur despite “calming” marketing, I rate it as very gentle but not inert. Safety Notes: Poria Cocos Sclerotium Extract appears in commercial skincare products across a wide concentration spectrum. At the low end (0.1-0.5%), it functions as a supporting botanical ingredient in multi-component serums and moisturizers for its anti-inflammatory and skin-soothing properties. High-strength formulations, particularly in K-beauty and specialty brightening/anti-aging products, utilize concentrations up to 10% where it serves as a primary active ingredient for its polysaccharide content, moisture-retention properties, and tyrosinase inhibition effects. Both leave-on and rinse-off products span this range, though higher concentrations are predominantly found in leave-on serums and ampoules.