Oyster mushroom (Pleurotus ostreatus) powder at 1.5 g daily for 21 days helped burned rats maintain healthier protein levels, lower inflammation signals, and rebuild more collagen in damaged skin. Researchers identified 109 natural compounds in the mushroom, including amino acids, ergothioneine, choline, and phenolics tied to healing and tissue repair. The strongest effect was improved skin structure, with thicker collagen support and better rebuilding of the damaged tissue matrix.