“Clinically tested” or “science-backed”
Evidence →No named, citable study of this product or formula was located in public sources. The claim may rest on ingredient-level research rather than a trial of this product.
Exact product checked · barcode not publishedHost Defense · observed 2026-07-21USPTO returned 3 exact supplement-class owner records · inspect the identity trail
Quick read · Host Defense
Host Defense Mushrooms Lion's Mane
Marketing check: 1 marketing claim needs attention.
Rebuilt from public sources on July 23, 2026 · evidence availability is not a safety or effectiveness verdict.
Marketing claims, checked
Does the marketing hold up?
Couldn’t verify means public proof was not found; it is not a mark against the product. Ingredient research is not treated as a trial of this exact product.
△Claimed without support found1
Quick read · 2 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Needs explanationAny trouble on the record?
FDA recall appears in this brand's history
An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.
Evidence and sources
Brand-level context only, not a finding about this product. Fungi Perfecti LLC recalled a different or not-exactly-bound product on 2019-02-28: “Host Defense MycoBotanicals Blood Sugar, 60 ct. bottles, is recalled due to undeclared wheat.” (status: Terminated). The recalled produ…
Locked evidence record →Open the full source-linked findingPublic contextWho is behind it?
Registered owner records: Turtle Bear Holdings, LLC · Stamets, Paul
The public ownership record is ambiguous. We show the exact candidates instead of choosing one by name similarity.
Evidence and sources
USPTO returned multiple live supplement-class records for the exact brand wordmark: Turtle Bear Holdings, LLC, Stamets, Paul. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.
Locked evidence record →Open the full source-linked findingWho owns the brand wordmark?
The brand has 3 exact supplement-class records
These are the USPTO records behind the brand name. We show them all rather than choosing one by similarity.
🇺🇸Turtle Bear Holdings, LLC
DELAWARE, USA · Registration 7337254
50 SE Nelson Road, Shelton, WASHINGTON 98584, UNITED STATES
Goods covered by this record
IC 030: Powdered coffee; powdered coffee also containing mushrooms, mycelium, or extracts thereof; instant coffee; instant coffee containing mushrooms, mycelium, or extracts thereof; mixes in the nature of powders for use in the preparation of coffee-based beverages; mixes in the nature of powders for use in the preparation of coffee-based beverages also containing mushrooms, mycelium, or extracts thereof; mixes in the nature of powders for use in the preparation of tea-based beverages; mixes in the nature of powders for use in the preparation of tea-based beverages also containing mushrooms, mycelium, or extracts thereof; hot chocolate mixes; hot chocolate mixes also containing mushrooms, mycelium, or extracts thereof; cocoa mixes; cocoa mixes also containing mushrooms, mycelium, or extracts thereof.; IC 005: Nutritional supplements; powdered nutritional supplement drink mix.
🇺🇸Stamets, Paul
USA; DELAWARE, USA · Registration 2506839
USA) DBA Fungi Perfecti; P.O. Box 7634, Olympia, WASHINGTON 98507, UNITED STATES
Goods covered by this record
IC 005: Nutritional supplements, namely, mushroom powders and products for fortifying the immune system.
🇺🇸Stamets, Paul
USA; DELAWARE, USA · Registration 5630909
P.O. Box 7634, Olympia, WASHINGTON 98507, UNITED STATES
Goods covered by this record
IC 005: Nutritional supplements; nutritional supplements, namely, mushroom powders and products for fortifying the immune system; liquid nutritional supplement; nutritional supplements, namely, Chaga (Inonotus obliquus) mycelium or Maitake (Grifola frondosa) mycelium or Reishi (Ganoderma lucidum s.l.) mycelium or Cordyceps mycelium or Royal Sun Blazei (Agaricus blazei f. blazei) mycelium or Enokitake (Flammulina velutipes) mycelium or Mesima (Phellinus linteus) mycelium or Turkey Tails (Trametes versicolor) mycelium or Oyster Mushroom (Pleurotus ostreatus) mycelium or Lion's Mane (Hericium erinaceus) mycelium or Artists' Conk (Ganoderma applanatum s.l.) mycelium or Oregon Reishi (Ganoderma oregonense s.l.) mycelium or Agarikon (Fomitopsis officinalis) mycelium or Amadou (Fomes fomentarius) mycelium or Shiitake (Lentinula edodes) mycelium or Maitake (Grifola frondosa) fruitbodies or Birch Polypore (Piptoporus betulinus) mycelium or Split Gill Polypore (Schizophyllum commune) mycelium or combinations thereof; and nutritional supplements, namely, Inonotus obliquus (Chaga) mycelium extract or Grifola frondosa (Maitake) mycelium extract or Ganoderma lucidum s.l. (Reishi) mycelium extract or Agaricus blazei f. blazei (Cordyceps mycelium extract or Royal Sun Blazei mycelium extract) or Flammulina velutipes (Enokitake) mycelium extract or Mesima (Phellinus linteus) mycelium extract or Turkey Tails (Trametes versicolor) mycelium extract or Oyster Mushroom (Pleurotus ostreatus) mycelium extract or Lion's Mane (Hericium erinaceus) mycelium extract or Artists' Conk (Ganoderma applanatum s.l.) mycelium extract or Oregon Reishi (Ganoderma oregonense s.l.) mycelium extract or Agarikon (Fomitopsis officinalis) mycelium or Amadou (Fomes fomentarius) mycelium extract or Shiitake (Lentinula edodes) mycelium extract or Maitake (Grifola frondosa) fruitbodies or Birch Polypore (Piptoporus betulinus) mycelium extract or Split Gill Polypore (Schizophyllum commune) mycelium extract or combinations thereof.
This answers who owns registrations for the brand wordmark. It does not by itself prove which entity made, imported, or sold this specific product. Open USPTO source ↗
Buying options
Where you can check or buy it
Open related seller leads before buying, then confirm the flavor, count, and serving size. Their prices are visible, but LookCloser does not claim savings until the pages share a UPC/GTIN.
Amazon
Submitted listingNo price confirmed
Exact page checked on 2026-07-21; current price was not retained.
View on Amazon ↗Brand website
Official storefrontNo price confirmed
Open the brand storefront to search manually.
No defensible same-product page was retained from the brand catalog.
Check brand website ↗Walmart
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Walmart ↗iHerb
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search iHerb ↗Prices and stock are point-in-time observations. Related pages are never used as product evidence. No affiliate links; LookCloser earns nothing from these sellers.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Open the full evidence trailSources, edge cases, and every unresolved check
Confirmed evidence
What checked out00
These checks found support in the public record. They confirm specific facts, not the product as a whole.
Nothing could be independently confirmed from the available record.
Documented concerns
What needs caution00
These are documented contradictions or claims that need more evidence. They are separate from missing data.
No contradictions or product-specific cautions were found at this check depth.
Unresolved public record
What is still missing05
We looked for these signals but could not settle them from public sources. A gap is not a strike.
Multiple USPTO brand-owner records are shown
USPTO returned multiple live supplement-class records for the exact brand wordmark: Turtle Bear Holdings, LLC, Stamets, Paul. These records answer who owns registrations for the brand; the separate product-to-owner or manufacturer link remains open.
FDA recall appears in this brand's history
Brand-level context only, not a finding about this product. Fungi Perfecti LLC recalled a different or not-exactly-bound product on 2019-02-28: “Host Defense MycoBotanicals Blood Sugar, 60 ct. bottles, is recalled due to undeclared wheat.” (status: Terminated). The recalled product was: “Host Defense MycoBotanicals Blood Sugar, dietary supplement, 500mg capsules, 60 ct per bottle, serving size 2 capsules per day. UPC: 6 33422 70474 6 (distributed in US) UPC: 8 ” — not necessarily the product on this page. Verify at FDA’s recall database.
Multi-ingredient formula — panel read, serving weight unknown
We read the full Supplement Facts panel from the listing-image panel (below), but the label doesn’t state a serving weight, so the arithmetic can’t run. A gap in the label’s information, not evidence of a problem.
This item belongs to a catalog variation family
The paid catalog links this exact item to a parent listing. Review counts on public product pages may be shared across sizes, flavors, or other variants, so the count history is listing context — not evidence that reviewers received or tested this exact variant.
180-day review-count history is on file
Exact-listing history records written-review counts from 789 on 2026-01-23 to 823 on 2026-07-21 (net +34). Count movements can reflect sales, listing variants, collection resets, or moderation; this history does not establish whether reviews are authentic.
What to ask and check
What would settle the open questions
Why is this shown?
Everything we couldn’t verify is something a person can still ask about. Rather than leave gaps sitting as dead ends, we turn each one into a specific question — the exact document, citation, or number that would settle it — plus the things you can confirm yourself with the bottle in your hand.
Ask the brand or seller
1
Which specific study supports this claim — and was it run on this exact formula?
Ask for the citation, how many people took part, the dose used, and whether the study tested this product or just one ingredient in it. Ingredient research is not product evidence.
2
What is the product’s UPC or GTIN?
The barcode is how a product gets matched to outside records — certification registries, label databases, recall data. Without it, almost nothing can be cross-checked.
3
Is this label filed with NIH’s Dietary Supplement Label Database (DSLD)?
Filing is voluntary, so absence proves nothing — but a filed label puts the full ingredient table on public record where anyone can read it.
Most brands and sellers publish a contact route. A clear answer adds evidence to the record; no answer leaves the question open.
Check for yourself — no one’s permission needed
1
Compare the panel on the bottle in your hand to the one shown in this record.
Ours was read from listing photos and can contain reading errors. The physical label is the source of truth — if they disagree, tell us and we’ll correct the record.
2
Check the lot number and expiry on the bottle against any COA you’re given.
A certificate that doesn’t name your lot doesn’t describe what you’re holding.
These are the open questions on this specific record — not a warning about the product, and not a suggestion to buy or avoid it. Getting them answered is how you decide for yourself.
Record built July 23, 2026. Sources: source listing observed at check time · USPTO Trademark Search · Keepa exact-listing history · NIH / published research · certification and regulator records where available. LookCloser publishes evidence and gaps; it does not advise for or against any supplement. Evidence-based corrections welcome.