Source Naturals Mushroom Immune Defense™, 120 Tablets supplement bottle
Source Naturals

Mushroom Immune Defense™, 120 Tablets

What We Researched
9 active ingredients analyzed · 4 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
74
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as ascorbic acid) 100 mg 111%
Reishi Mycelia Biomass and/or fruiting body 250 mg
Shiitake Mycelia Biomass 200 mg
Maitake Mycelia Biomass 200 mg
Turkey Tail Mycelia Biomass 150 mg
Proprietary Blend:Agaricus blazei mycelia biomass, hericium erinaceus mycelia biomass, flammulina velutipes mycelia biomass, artist's conk mycelia biomass tremella mycelia biomass, schizophyllum commune mycelia biomass, poria mycelia biomass, grifola umbellata mycelia biomass, cordyceps militaris fruiting body extract, pleurotus ostreatus mycelia biomass, cordyceps militaris mycelia biomass, maitake mushroom extract, turkey tail mushroom extract, agaricus blazei mushroom extract, shiitake mushroom extract, reishi mushroom extract, and Dr. Nanba's Maitake Beta-Factor™ (beta-glucan) fraction†† 1.25 g
Bioavailability Good

Absorption Rating

  • Vitamin C (as ascorbic acid) Fair
  • Reishi Mycelia Biomass and/or fruiting body Fair
  • Shiitake Mycelia Biomass Fair
  • Maitake Mycelia Biomass Good
  • Turkey Tail Mycelia Biomass Fair
  • Proprietary Blend:Agaricus blazei mycelia biomass, hericium erinaceus mycelia biomass, flammulina velutipes mycelia biomass, artist's conk mycelia biomass tremella mycelia biomass, schizophyllum commune mycelia biomass, poria mycelia biomass, grifola umbellata mycelia biomass, cordyceps militaris fruiting body extract, pleurotus ostreatus mycelia biomass, cordyceps militaris mycelia biomass, maitake mushroom extract, turkey tail mushroom extract, agaricus blazei mushroom extract, shiitake mushroom extract, reishi mushroom extract, and Dr. Nanba's Maitake Beta-Factor™ (beta-glucan) fraction†† Good
Other Ingredients Excellent

Fillers & Additives

  • Stearic Acid
  • Silicon Dioxide
  • Colloidal
  • Modified Cellulose Gum
Efficacy Poor

Dosage Analysis

  • Vitamin C (as ascorbic acid) 100 mg Effective
  • Reishi Mycelia Biomass and/or fruiting body 250 mg Under-dosed
  • Shiitake Mycelia Biomass 200 mg Under-dosed
  • Maitake Mycelia Biomass 200 mg Under-dosed
  • Turkey Tail Mycelia Biomass 150 mg Under-dosed
  • Proprietary Blend:Agaricus blazei mycelia biomass, hericium erinaceus mycelia biomass, flammulina velutipes mycelia biomass, artist's conk mycelia biomass tremella mycelia biomass, schizophyllum commune mycelia biomass, poria mycelia biomass, grifola umbellata mycelia biomass, cordyceps militaris fruiting body extract, pleurotus ostreatus mycelia biomass, cordyceps militaris mycelia biomass, maitake mushroom extract, turkey tail mushroom extract, agaricus blazei mushroom extract, shiitake mushroom extract, reishi mushroom extract, and Dr. Nanba's Maitake Beta-Factor™ (beta-glucan) fraction†† 1.25 g Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 10
Total Carbohydrate 2 g 1%*
Dietary Fiber 1 g 4%*
Vitamin C (as ascorbic acid) 100 mg 111%
Reishi Mycelia Biomass and/or fruiting body 250 mg
Shiitake Mycelia Biomass 200 mg
Maitake Mycelia Biomass 200 mg
Turkey Tail Mycelia Biomass 150 mg
Proprietary Blend:Agaricus blazei mycelia biomass, hericium erinaceus mycelia biomass, flammulina velutipes mycelia biomass, artist's conk mycelia biomass tremella mycelia biomass, schizophyllum commune mycelia biomass, poria mycelia biomass, grifola umbellata mycelia biomass, cordyceps militaris fruiting body extract, pleurotus ostreatus mycelia biomass, cordyceps militaris mycelia biomass, maitake mushroom extract, turkey tail mushroom extract, agaricus blazei mushroom extract, shiitake mushroom extract, reishi mushroom extract, and Dr. Nanba's Maitake Beta-Factor™ (beta-glucan) fraction†† 1.25 g

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Colloidal Unknown
Modified Cellulose Gum Generally_safe

It is used to improve the texture and stability of products.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$38$37$36$35$34 Mar 12 $36.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Source Naturals Mushroom Immune Defense™, 120 Tablets a good supplement?

Source Naturals Mushroom Immune Defense™, 120 Tablets received a product quality score of 74/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 9 active ingredients with 60 servings per container. Of the 4 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals Mushroom Immune Defense™, 120 Tablets?

Source Naturals Mushroom Immune Defense™, 120 Tablets contains 9 active ingredients: Calories (10), Total Carbohydrate (2 g), Dietary Fiber (1 g), Vitamin C (as ascorbic acid) (100 mg), Reishi Mycelia Biomass and/or fruiting body (250 mg), Shiitake Mycelia Biomass (200 mg), and 3 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals Mushroom Immune Defense™, 120 Tablets safe to take?

Source Naturals Mushroom Immune Defense™, 120 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.