Lentinula edodes, commonly known as shiitake, is a culinary and medicinal mushroom in the family Omphalotaceae native to East Asia, where it thrives in humid temperate forests on decaying hardwood, particularly oak. It has a rich, savory umami aroma, a meaty texture, and earthy, slightly garlicky taste when cooked. Shiitake has immunomodulatory, anti-inflammatory, antiviral, lipid-lowering, and anticancer properties, largely attributed to beta-glucans such as lentinan, along with eritadenine, sterols, and phenolic compounds. Clinically, it has been studied for immune support, hyperlipidemia, cardiovascular risk reduction, and as an adjunct in cancer therapies. A human study evaluating daily shiitake consumption found improved immune markers, including enhanced T-cell function and reduced inflammatory markers, supporting its role in modulating immune function in healthy adults PMID: 25866155. Historically cultivated in China for over 1,000 years, Lentinula edodes was once reserved for the emperors and nobility, and traditional lore regarded it as an elixir of longevity, with its growers historically striking oak logs to stimulate fruiting, a practice that has contributed to its Japanese name which translates to the "mushroom of the shii tree".