Birch bolete mushroom (Leccinum scabrum) extract strongly inhibits enzymes that break down carbs in the body. Using green solvents and microwave extraction, researchers found the ethyl acetate extract was 60 times more potent than standard diabetes drugs at blocking α-glucosidase. The extract was also safe in toxicity tests and contained beneficial compounds like essential fatty acids (especially linoleic acid), sterols like ergosterol, and unique alkaloids. In fruit fly tests, it reduced blood sugar by 43%. This is the first evidence of anti-diabetic properties from this common edible mushroom.