Researchers developed a quick, damage-free method to measure the health-promoting polysaccharide content in Ganoderma lucidum mushrooms using special imaging technology that analyzes light reflection. This technology combines visible and near-infrared light imaging with computer learning to predict polysaccharide levels across the entire mushroom cap. The method achieved 92.4% accuracy and could help mushroom farmers determine the best time to harvest for maximum nutritional value.