Swanson Shiitake Mushroom Extract is a dietary supplement that supports immune health by delivering a concentrated shiitake extract to help you stay resilient. Swanson Shiitake Mushroom Extract is a dietary supplement that backs immune health by sharing a concentrated shiitake extract to help you stay resilient, and ready for daily life.

Available Sizes & Variants:

120 capsules - convenient daily immune support.

Benefits & Features:

• Supports immune health with a concentrated shiitake extract that delivers clear everyday resilience.
• Promotes balanced immune responses thanks to beta-glucans and polysaccharides that help train immune cells and support cytokine signalling in everyday life and during minor illness.
• Suitable for daily use as part of a herbal supplements routine.
• Antioxidant activity from shiitake compounds may help counter oxidative stress and support overall wellbeing.
• Manufactured in the United States to rigorous standards.

Shiitake mushrooms have a long history in herbal supplements for immune support. This Swanson extract uses a 4:1 concentration from shiitake fruiting bodies, concentrating beta-glucans and polysaccharides that help modulate immune activity. Made in the United States with simple, transparent ingredients, it reflects Swanson’s commitment to quality. Fans of the liver king approach to natural living and those seeking straightforward herbal supplements can trust this product to deliver everyday support.

Shiitake Mushroom 4:1 Extract (Lentinula edodes) (fruiting bodies), Shiitake Mushroom 4:1 Extract (Lentinula edodes) (fruiting bodies)

• GTIN: 87614142685
• Manufacturer: Swanson
• Categories: Best SellersFunctional Mushroom SupplementsShiitake SupplementsSports Supplements Black Friday SaleSwanson
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

As a dietary supplement, take two capsules two times per day with water. Store in a cool, dry place. 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. Keep out of reach of children. Do not use if seal is broken.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Shiitake Mushroom Extract

Shiitake mushroom extract is a concentrated form sourced from the fruiting bodies of Lentinula edodes, tagged as a dietary supplement ingredient used to support immune health. This product relies on a 4:1 extract offered in capsule form for ease.

The extract is prepared from shiitake mushrooms and is presented with excipients in a capsule to aid delivery. This formulation centres on the primary active material, with extra minor components listed as part of the capsule contents.

What Does Shiitake Mushroom Extract Do?

Shiitake mushroom extract takes part in immune system activity, helping the body’s normal immune response as described in clinical contexts of shiitake polysaccharides and beta-glucans.

Scientific discussions note that beta-glucans and polysaccharides in shiitake can activate immune cells, supporting immune resilience. Dr. Dai of the University of Nebraska found that regular intake of shiitake mushrooms may improve immune function.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Swanson is our preferred partner for Shiitake Mushroom Extract because the brand brings a global manufacturing heritage and a reputation for premium quality produced in the United States. This clarity and heritage give our medical team confidence in the core quality of the extract we rely on for this supplement, aligned with Welzo’s emphasis on reliability and safety.

This brand is recognised for its long-standing position in the industry, and our evaluation highlights Swanson’s commitment to delivering a concentrated shiitake extract that supports immune function and heart health as part of its traditional-use profile. The formulation strategy centres on standardised shiitake bioactives, using plain, well-understood ingredients in a tested delivery format, which our team checks via how we verify ingredient quality.

Welzo selected Swanson for its manufacturing excellence, third-party validation potential, and alignment with our UK regulatory and market standards. This brand was assessed by our medical team for compliance with our rigorous vetting criteria, and we feel confident in its fit for this immune-supporting supplement.