This study tested 30 different mushroom species to determine which ones are the best sources of natural antioxidants that can help protect the body from damage caused by harmful free radicals. Researchers grew the mushrooms in laboratory conditions and measured their antioxidant power and beneficial compounds like polyphenols and polysaccharides. Oyster-like mushrooms called Lentinula edodes and Fomitopsis pinicola showed the strongest antioxidant activity, making them promising candidates for use in health supplements and functional foods.