Shiitake Mushroom Extract

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Bolster your body’s natural defenses with the powerful immune support of Swanson Shiitake Mushroom Extract. For thousands of years, traditional Chinese and Japanese herbalists have treasured the shiitake mushroom for its unique immune-supporting properties. Modern science has revealed that shiitake mushrooms have unique polysaccharide constituents with a wide range of protective benefits throughout the body. Shiitake mushrooms can help support cardiovascular health, boost energy and brain function, promote skin health and more. Add shiitake extract to your wellness regimen today!


Supplement Facts

Serving Size 2 Capsules

Servings Per Container 60

Amount Per Serving % Daily Value
Shiitake Mushroom 4:1 Extract (Lentinula edodes) (fruiting bodies) 1 g *

*Daily Value not established.

Other Ingredients: Gelatin, rice bran, silica, magnesium stearate.

Suggested Use: As a dietary supplement, take two capsules two times per day with water.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.




  1. What Are the Benefits of Shiitake Supplements?
    Shiitake mushroom supplements are valued for their naturally occurring compounds, including beta-glucans and other polysaccharides. They are commonly used to support healthy immune function, provide antioxidant support, and promote overall wellness as part of a balanced lifestyle.
  2. What Nutrients Are Found in Shiitake Mushrooms?
    Shiitake mushrooms naturally contain a variety of nutrients, including polysaccharides, amino acids, fiber, and other beneficial plant compounds. They are particularly known for their beta-glucan content, which contributes to their popularity in wellness and immune-support supplements.
  3. What Is the Difference Between Shiitake Extract and Whole Shiitake Mushroom?
    Whole shiitake mushroom supplements contain the entire mushroom and its naturally occurring compounds, while shiitake extracts are concentrated to provide higher levels of specific constituents. Some consumers prefer whole mushroom products for a traditional approach, while others choose extracts for their concentrated content and convenience.
  4. What Makes Shiitake Different From Other Mushrooms?
    Like other functional mushrooms, shiitake contains naturally occurring compounds that support overall wellness. However, shiitake is particularly valued for its unique nutritional profile and naturally occurring beta-glucans, making it one of the most widely used mushrooms in both culinary and wellness traditions.
  5. What Does a 4:1 Shiitake Mushroom Extract Mean?
    Swanson Shiitake Mushroom Extract features a 4:1 extract, meaning four parts of shiitake mushroom are concentrated into one part of extract. This process creates a more concentrated source of shiitake's naturally occurring compounds than an equivalent amount of whole mushroom powder. The result is a convenient, potent formula designed to provide concentrated mushroom support in every capsule.
  6. Is Swanson Shiitake Mushroom Extract Suitable for Special Diets?
    Swanson Shiitake Mushroom Extract is made with non-GMO ingredients, making it a convenient choice for individuals seeking a non-GMO mushroom supplement. However, this product is not suitable for vegetarian or vegan diets because the capsule contains gelatin. Always review the product label for the most current ingredient, allergen, and dietary information before use.