LookCloser.aipublic supplement evidence
Exact product checked · GTIN 00199874158822MARS MEN · checked Jul 22, 2026 · on sale since Apr 1, 2026USPTO returned 2 exact supplement-class owner records · inspect the identity trail
Quick read · MARS MEN

MARS MEN Testosterone Booster for Men

Checked against public sources between July 22 and July 24, 2026 · LookCloser does not sell or recommend supplements.

150capsules · 30 servings

Does the marketing hold up?

Category context: sexual-enhancement products carry documented FDA risk. This is category history, not proof about this product, but it changes how much unsupported claims deserve to be trusted.

Is the dose real?Panel read — dose not verified9 ingredients listed; no advertised amount we could confirm against them
What a serving costs$2.78per serving, at the checked price
Is it tested?Claimed — no lab or certificate found
Who’s behind it?USPTO lists 2 owner recordssame brand name, more than one registrant — we don’t choose between them
Is it the real thing?Barcode matches outside records
Trouble on record?Recall check not run yeta gap in our records, not a finding about the 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◖ partly confirmed2? couldn’t verifyno contradictions · no recalls
The label itself

What the Supplement Facts panel says

Serving size 5 Vegetarian Capsules · 30 servings per container

Vitamin D (as Cholecalciferol)100 mcg
Vitamin K (as Phytonadione)100 mcg
Zinc (as Zinc Citrate)30 mg
Tongkat Ali (Eurycoma longifolia Root Extract)1,000 mg
Fenugreek (Trigonella Foenum-Graecum) Seed Extract1,000 mg
L-Taurine675 mg
Shilajit (Asphaltum s. Mineral Extract)400 mg
Boron (as Boron Citrate)4 mg
Vitamin K2 (as Menaquinone-7 Dicalcium Phosphate)100 mcg

Printed on the package: Made in USA · Third Party Tested · Non-GMO

We read 9 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

The public sources did not settle the marketing promises on this label.

Partly confirmed1

“MARS MEN Testosterone Booster for Men - Natural Supplement Premium Tongkat Ali, Fenugreek, Shilajit & Boron - Male Support - Libido, Energy &…”

Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.

Evidence →

Ingredient research can support context, but it is not a trial of this exact product.

?Couldn’t verify independently2

“Party”

No named laboratory or lot-specific certificate was found for this exact product. A related brand page names no testing issuer and links no product-bound report; its UPC is not published. NSF, IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur.

Evidence →
“in”

“Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product.

Evidence →

We looked and found no public proof. That does not count against the product.

Quick read · 4 useful findings

What is worth knowing.

Headlines first. Open evidence only when you want the source trail.

Needs explanationAny trouble in public records?

Category context: sexual-enhancement products carry documented FDA risk

This is category history, not proof about this product, but it changes how much unsupported claims deserve to be trusted.

Evidence and sources

FDA's health-fraud program documents sexual-enhancement products as the most common supplement category found to contain undeclared prescription-drug ingredients. This is a category-level documented fact from FDA's public database — not a test result for this specific product. …

Locked evidence record →Open the full source-linked finding
Public contextWho is behind it?

Registered owner records: Xufeng Liu · Mars Health, Inc.

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: Xufeng Liu, Mars Health, Inc.. 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 finding
CheckedIs the label honest?

Every ingredient shows its amount · 9 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 finding
CheckedCan you trust the review pattern?

Reviews rose from 0 to 27 between April 28 and August 1, 2026 — no sudden jump.

A count that moves steadily is ordinary. A sudden burst is what deserves a closer look.

Evidence and sources

Written reviews rose from 0 to 27 between April 28 and August 1, 2026. The largest rise inside any single 30-day window was about 14, so the count moved in steps rather than in one burst.

Locked evidence record →Open the full source-linked finding
What remains open 2
  • We have not found a public label filing for this exact product.
  • Barcode checksum is valid; no independent product record was found.

These are evidence gaps, not strikes against the product.

Who owns the brand wordmark?

The brand has 2 exact supplement-class records

These are the USPTO records behind the brand name. We show them all rather than choosing one by similarity.

🇨🇳Xufeng Liu

China · Registration application / registration number not stated

No. 057, Maonongying Village, Damiaoying Administrative Village, Haojiaying Township, Zhangbei County, Zhangjiakou City, Hebei Province, 076450, CHINA

Goods covered by this record

IC 005: Dietary food supplements; Dietary supplements for human consumption; Dietary supplements; Natural dietary supplements; Nutritional supplements.

🇺🇸Mars Health, Inc.

Delaware, USA · Registration application / registration number not stated

404 West Milton Street, Austin, Texas 78704, UNITED STATES

Goods covered by this record

IC 035: On-line retail store services featuring dietary and nutritional supplements for boosting testosterone; Retail store services featuring dietary and nutritional supplements for boosting testosterone.

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 ↗

Research behind the findings

Dose and research context

We could not match an amount on this product to a studied range for the same ingredient, so these links are ingredient background rather than a measurement of this product.

Background reading

What the research says about these amounts

Not a score. Studies disagree with each other and change over time, so this sits beside the evidence rather than counting toward it — it is here so you can read the sources yourself.

The panel lists 4 mg of boron per serving. Studies we found used 3 mg–10 mg a day, so this sits inside that range.

0studied 3 mg–10 mg

Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.

The panel lists 1 g of tongkat ali (Eurycoma longifolia) per serving. Studies we found used 200 mg–400 mg a day, so this sits above that range.

0studied 200 mg–400 mg

Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.

The panel lists 1 g of fenugreek per serving. Studies we found used 500 mg–600 mg a day, so this sits above that range.

0studied 500 mg–600 mg

Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.

The panel lists 30 mg of zinc per serving. Studies we found used 8 mg–40 mg a day, so this sits inside that range.

0studied 8 mg–40 mg

Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.

Where it sells

Price check for this exact product

Amazon

Exact UPC/GTIN match
$83.50

$2.78 per labeled serving

matching UPC/GTIN · checked Sep 2, 2026

View on Amazon ↗

Brand website

Official product-page candidate · UPC absent
$91.00

Official shopping lead; excluded from exact price comparisons.

Natural Testosterone Support with Tongkat Ali · 30 Day Supply. Confirm the package UPC/GTIN before buying.

Check brand website ↗

iHerb

Not confirmed
No exact listing saved

We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.

Search iHerb ↗

Target

Not confirmed
No exact listing saved

We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.

Search Target ↗

Walmart

Not confirmed
No exact listing saved

We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.

Search Walmart ↗

Only one exact price was available at build time; prices change by date, seller, and promotion.

The brand-page price is shown as a shopping lead only. It is excluded from the exact-product price difference because the page does not publish this record's matching UPC/GTIN.

Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.

Want to inspect the evidence?

The full report shows every source, the exact unresolved question, and the documentation that would settle it.

Read / share full evidence →

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.