Researchers developed a fortified mushroom powder drink using ultrasonically-treated flax seeds and oven-dried oyster mushrooms. The drink combines mushroom powder with flax, chia and pumpkin seed powders in low-fat milk. With 25% mushroom powder fortification, it was most palatable and nutritionally rich in protein, fiber and minerals, suggesting it could help meet nutritional needs, especially for children, pregnant women and the elderly requiring high-protein diets.