“5-Htp 100 mg per serving”
Evidence →The label promises 100 mg per serving. The panel says 100 mg. They match.
Exact product checked · barcode not publishedNatrol · checked Jul 22, 2026USPTO returned 4 exact supplement-class owner records · inspect the identity trail
Quick read · Natrol
Natrol 5-HTP 100 mg Time Release
Checked against public sources on July 22, 2026 · LookCloser does not sell or recommend supplements.
45tablets
45servings per container
Does the marketing hold up?
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.
Is the dose real?✓Listing and panel agreeboth say 100 mg of 5-HTP
What a serving costsNo price found for this exact barcode
Is it tested?No testing claim made
Who’s behind it?USPTO lists 4 owner recordssame brand name, more than one registrant — we don’t choose between them
Is it the real thing?No barcode publishedso it can’t be matched against certification, recall or other retailer records
Trouble on record?Brand history — not this product
“Couldn’t verify” means we looked and found no public proof — not a mark against the product. Most supplement claims cannot be independently verified by anyone, so grey is the normal state of this industry.
1✓ checked outno contradictions · brand-level recall on file
The label itself
What the Supplement Facts panel says
| Calcium | 32 mg |
|---|---|
| 5-HTP (5-Hydroxytryptophan) | 100 mg |
Printed on the package: 100% DRUG FREE · NON-GMO · VEGETARIAN
We read 2 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
Marketing claims, checked
The checks, one by one
1 promise checks out against the label or linked source.
✓Matches the label1
Quick read · 5 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
Needs explanationAny trouble in public records?
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
This recall is not about the product on this page. Natrol, LLC recalled a different product on April 8, 2021. FDA has since closed that case. The recalled item was “Natrol Melatonin 3 mg, Tab 60 White bottle with purple flip-top cap.…”
Locked evidence record →Open the full source-linked findingPublic contextWho is behind it?
Registered owner records: NATROL, INC. · Natrol, Inc. · Natrol LLC
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: NATROL, INC., Natrol, Inc., Natrol LLC. 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 findingCheckedIs the label honest?
Listing claim matches the Supplement Facts panel
The label promise and the Supplement Facts amount agree.
Evidence and sources
The listing claims 100 mg; the photo-read Supplement Facts panel shows 5-HTP (5-Hydroxytryptophan) at 100 mg per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
Locked evidence record →Open the full source-linked findingCheckedIs the label honest?
Every ingredient shows its amount · 2 ingredients listed.
Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
Evidence and sources
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
Locked evidence record →Open the full source-linked findingCheckedCan you trust the review pattern?
We can see 3 of this product’s 367 reviews — the count rose between August 8, 2025 and July 15, 2026. That is too small a slice to say anything about the wider pattern.
A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
Evidence and sources
Written reviews rose from 364 to 367 between August 8, 2025 and July 15, 2026. The largest rise inside any single 30-day window was about 2, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingWho owns the brand wordmark?
The brand has 4 exact supplement-class records
These are the USPTO records behind the brand name. We show them all rather than choosing one by similarity.
🇺🇸NATROL, INC.
CALIFORNIA, USA; DELAWARE, USA · Registration 1532608
21411 Prairie Street, CHATSWORTH, CALIFORNIA 91311, UNITED STATES
Goods covered by this record
IC 005: FOOD SUPPLEMENTS, NAMELY SUPPLEMENTS COMPRISING IN WHOLE OR PART MINERALS, VITAMINS, GREEN FOOD, FIBERS AND HERBS.
🇺🇸Natrol, Inc.
DELAWARE, USA · Registration 2906488
21411 Prairie Street, Chatsworth, CALIFORNIA 91311, UNITED STATES
Goods covered by this record
IC 005: full line of dietary supplements.
🇺🇸Natrol LLC
DELAWARE, USA · Registration 5643583
21411 Prairie Street, Chats, California 91311, UNITED STATES
Goods covered by this record
IC 005: Dietary and nutritional supplements; Vitamins.
🇺🇸Natrol LLC
Delaware, USA · Registration 8235633
21411 Prairie Street, Chatsworth, California 91311, UNITED STATES
Goods covered by this record
IC 005: Vitamins; Dietary and nutritional supplements.
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 listing$17.32
Amazon Retail observed via Keepa on 2026-08-29.
View on Amazon ↗Brand website
Official product-page candidate · UPC absent$19.29
Useful official shopping lead; excluded from exact price comparisons.
Time Release 5-HTP 100mg Tablets · Default Title. The page matches 100 mg, but omits the identifier needed to bind the exact sellable unit.
Check brand website ↗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 ↗Target
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 Target ↗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 ↗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.
Record built September 03, 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.