Researchers analyzed seven popular mushroom varieties to understand their chemical makeup. They found over 10,000 different compounds across all mushrooms, with each variety having its own unique set of chemicals. Lion’s mane and oyster mushrooms were particularly rich in L-ergothioneine, a special amino acid thought to have antioxidant and anti-aging properties. The common white button, crimini, and portabella mushrooms had similar nutrient profiles, while specialty mushrooms had distinct chemical signatures.