Host Defense Mushrooms™, MycoShield® Thyroid Spray, Cinnamon, 1 fl oz (30 ml) supplement bottle
Host Defense

Mushrooms™, MycoShield® Thyroid Spray, Cinnamon, 1 fl oz (30 ml)

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 5 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
71
Product Score Fair
63
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Proprietary Extract BlendFresh Agarikon (Fomitopsis officinalis) mycelium‡/rice biomass extract‡, Fresh Reishi (Ganoderma lucidum s.l.) mycelium‡/rice biomass extract‡, Fresh Chaga (Inonotus obliquus) mycelium‡/rice biomass extract‡, Fresh Birch Polypore (Piptoporus betulinus) mycelium‡/rice biomass extract‡, Fresh Turkey Tails (Trametes versicolor) mycelium‡/rice biomass extract‡ 0.42 ml
Bioavailability Excellent

Absorption Rating

  • Proprietary Extract BlendFresh Agarikon (Fomitopsis officinalis) mycelium‡/rice biomass extract‡, Fresh Reishi (Ganoderma lucidum s.l.) mycelium‡/rice biomass extract‡, Fresh Chaga (Inonotus obliquus) mycelium‡/rice biomass extract‡, Fresh Birch Polypore (Piptoporus betulinus) mycelium‡/rice biomass extract‡, Fresh Turkey Tails (Trametes versicolor) mycelium‡/rice biomass extract‡ Good
Other Ingredients Very Good

Fillers & Additives

  • Water
  • Alcohol Medium
  • Cassia Essential Oil
Efficacy Very Poor

Dosage Analysis

  • Proprietary Extract BlendFresh Agarikon (Fomitopsis officinalis) mycelium‡/rice biomass extract‡, Fresh Reishi (Ganoderma lucidum s.l.) mycelium‡/rice biomass extract‡, Fresh Chaga (Inonotus obliquus) mycelium‡/rice biomass extract‡, Fresh Birch Polypore (Piptoporus betulinus) mycelium‡/rice biomass extract‡, Fresh Turkey Tails (Trametes versicolor) mycelium‡/rice biomass extract‡ 0.42 ml Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Proprietary Extract BlendFresh Agarikon (Fomitopsis officinalis) mycelium‡/rice biomass extract‡, Fresh Reishi (Ganoderma lucidum s.l.) mycelium‡/rice biomass extract‡, Fresh Chaga (Inonotus obliquus) mycelium‡/rice biomass extract‡, Fresh Birch Polypore (Piptoporus betulinus) mycelium‡/rice biomass extract‡, Fresh Turkey Tails (Trametes versicolor) mycelium‡/rice biomass extract‡ 0.42 ml

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Water Safe

Dissolves and carries water-soluble ingredients.

Alcohol Caution

It is used to dissolve ingredients and as a preservative.

Cassia Essential Oil Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$18$15$11$8$4 Mar 12 $15.71$7.00
iHerb
Vitacost

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

Brand Trust Report
Host Defense

Founded 1980 · Olympia, WA, USA · 63 products · hostdefense.com/

Certifications

5 certifications
B Corp Certified Verified Source
Usda Organic Verified Source
Gluten Free Gfco Verified Source
Non Gmo Project Verified Source
Vegan Certified Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed
In House Testing — Claimed

Violation History

1 incident
Lawsuit Trademark infringement and tortious interference of existing contracts and business relationships by an unauthorized seller.2024Source
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Frequently Asked Questions
Is Host Defense Mushrooms™, MycoShield® Thyroid Spray a good supplement?

Host Defense Mushrooms™, MycoShield® Thyroid Spray, Cinnamon, 1 fl oz (30 ml) received a product quality score of 71/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients with 71 servings per container. Of the 3 inactive ingredients, 1 are rated safe and 1 are flagged for review. The manufacturer, Host Defense, holds a brand trust score of 63/100 with 5 verified certifications including B Corp Certified, Usda Organic, Gluten Free Gfco, Non Gmo Project.

What are the ingredients in Host Defense Mushrooms™, MycoShield® Thyroid Spray?

Host Defense Mushrooms™, MycoShield® Thyroid Spray contains 1 active ingredients: Proprietary Extract BlendFresh Agarikon (Fomitopsis officinalis) mycelium‡/rice biomass extract‡, Fresh Reishi (Ganoderma lucidum s.l.) mycelium‡/rice biomass extract‡, Fresh Chaga (Inonotus obliquus) mycelium‡/rice biomass extract‡, Fresh Birch Polypore (Piptoporus betulinus) mycelium‡/rice biomass extract‡, Fresh Turkey Tails (Trametes versicolor) mycelium‡/rice biomass extract‡ (0.42 ml). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Host Defense Mushrooms™, MycoShield® Thyroid Spray safe to take?

Host Defense Mushrooms™, MycoShield® Thyroid Spray, Cinnamon, 1 fl oz (30 ml) has been analyzed for ingredient safety across all its components. Of 3 inactive ingredients, 1 are rated safe. 1 ingredient is flagged for review: Alcohol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Host Defense a trustworthy supplement brand?

Host Defense receives a brand trust score of 63/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in Olympia, WA, USA, the company offers 63 products in their lineup. They hold 5 verified certifications including B Corp Certified, Usda Organic, Gluten Free Gfco, Non Gmo Project. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Host Defense has 1 historical regulatory incident on record, which are factored into the trust score.

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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.