Shiitake is an edible mushroom that doubles as a dietary supplement. The mushroom naturally contains lentinan and beta-glucans, which support healthy immune function.
People reach for shiitake capsules or powders to maintain general immunity and overall wellness. The same supplement is also chosen to promote cardiovascular health and keep cholesterol levels within a normal range.
Most supplements use dried whole mushroom powder. Capsules or loose powder are taken alongside meals to ease digestion.
Side effects include mild stomach upset or allergic reactions. Anyone with a mushroom allergy, an autoimmune condition, or a prescription for blood thinners should be careful. Pause use and talk to a doctor if you notice any concerning reaction.