Which Hair Supplements Publish a Certificate of Analysis? 0 of 40, Then 1

"Which hair supplements publish a certificate of analysis?" has a short answer and a long table. We read the listing and, where one exists, the whole brand site of 40 hair supplements sold to men in the United States between 7 and 9 September 2026, looking for one document: a laboratory report that says what a specific lot measured. None of the 40 published one on the date we read it, our own product included. Eleven printed a badge, a mark or a promise instead; twenty-eight said nothing. On 10 September 2026 we published ours, in full, as text — which makes the count 1 of 40 from that date, and makes this the article where we show you what a certificate looks like when it is not flattering.

Which hair supplements publish a certificate of analysis?

Of 40 hair supplements sold to men in the United States, 0 published a certificate of analysis a buyer could open without contacting the brand when we read them on 7–9 September 2026; 11 of the 40 displayed a testing badge, a certification mark or an "available on request" line with no document behind it, and 28 said nothing about testing at all. Since 10 September 2026 the count is 1 of 40: BLOOHAIR MEN, lot 0125269, published as text on our Lab Tests page.

The sample is the same 40 products we used for our saw palmetto survey: every men-specific hair formula on Amazon's first page for "hair supplement for men" and "dht blocker hair supplement men" and on Google's first page on 7 September 2026, plus the brands from our earlier articles, plus the most-reviewed unisex hair formulas from the same Amazon pages until the table reached 40. For each one we looked at the listing gallery, the listing text, and — where the brand has a site — the product page, the help centre and any quality or testing page. The lesson from our first audit in another category still holds: a certificate is more often hidden on a quality page or a sub-domain than on the product page, so a search limited to the product page overstates the failure. We searched the whole site and the failure stands.

The eleven claims, and what stands behind each

Two products carry a certification mark: Nutrafol Men and Nutrafol Men 50+ print the NSF Certified for Sport mark on the label. A mark tells you a certification programme exists; it does not put the lot's results in front of you, and nutrafol.com publishes no certificate. Seven products display a badge or a sentence: Force Factor ("Third-Party Tested"), Clean Nutraceuticals' Foli Guard ("Third Party Tested"), Peak Vitals ("3rd party lab tested", next to a graphic that says results are "published online" with no link), Micro Ingredients ("lab tested", "third party tested"), Dr. Berg ("3rd-Party Tested" in the product title itself), Lunakai ("stringent third-party testing" in the listing text) and HiWell Absorfyx, whose badge reads "COA Verified by Batch" — the only listing of the 40 that uses the word, and it leads nowhere. Two brands offer the document on request: Life Extension's quality page says a summary is available if you "just ask us", and Rainbow Nutrients shows a "Certificate of Compliance" graphic — tick marks, no laboratory name, no lot number, no value — with "available upon request" written underneath.

None of those eleven statements is false as far as we can tell, and none of them is checkable. That is the whole distinction this article is about. "Third-party tested" is a phrase; a certificate of analysis is a document with a laboratory's name, a lot number, a method and a number for each test. The phrase costs nothing to print. The document can only be published if it exists and if the brand is willing to let you read it.

And the one that said "not yet"

On 8 September 2026 our own Lab Tests page said that the finished-product certificate and the allergen report were not yet published — awaited from the manufacturer — and we scored ourselves a zero like everyone else. Both documents arrived on 10 September 2026 and were published the same day, in full, as text. They corrected six amounts that this site had overstated, which we wrote up at the top of the Supplement Facts page and in our Nutrafol alternatives article. A certificate is worth publishing precisely because it can do that to you.

What is a certificate of analysis, and does the law require one?

A certificate of analysis is a laboratory's report of what one specific lot measured against the specifications set for it — identity, potency, contaminants — and United States law requires the testing but not the publishing: 21 CFR Part 111, the dietary supplement manufacturing rule, requires a manufacturer to set specifications (§ 111.70), to test or examine each lot against them (§ 111.75) and to keep the records (§ 111.95), and nowhere requires that a consumer ever see them.

So every product in the table was, in all likelihood, tested. The rule has been in force since 2010 for the smallest manufacturers, and a contract manufacturer that did not test would not keep its licence for long. What differs from brand to brand is not whether a certificate exists but whether it is placed in front of the buyer. That is why the question in the title is a fair one to put to a label: it asks about a choice, not about a legal obligation, and a brand that answers "yes" has decided that a stranger may check its numbers.

What a certificate can and cannot tell you

Three limits, stated plainly because our own certificate carries them. First, a certificate describes the sample submitted, not every bottle: the laboratory note on ours says so in those words. Second, the specifications a lot is tested against are usually set by the brand, so "meets specification" means "meets the specification we chose" — the useful part of a certificate is the measured value, which you can compare with the label claim yourself. Third, a certificate says what is in the capsule; it says nothing about what the capsule does. The most complete certificate in the world is not a clinical trial, and no controlled trial has tested our formula.

What does the BLOOHAIR MEN certificate actually show?

For lot 0125269, the manufacturer's laboratory measured all 22 active ingredients at between 100% and 148% of the label claim (19 of 22 at 100–101%; vitamin C at 111%, grape seed extract at 113% and zinc at 148%), found total aerobic count at 275 cfu/g against a limit of 10,000, yeast and mould at 150 cfu/g against 1,000, Salmonella, E. coli and Staphylococcus aureus absent, and arsenic, cadmium, lead and mercury at 0.858, 0.073, 0.831 and 0.035 mcg per unit against limits of 3, 3, 10 and 3; a separate report from Contract Testing Laboratories of America found gluten, soy and milk below detection by ELISA (transcribed 10 September 2026).

The full transcription — every ingredient, method and result, plus the capsule fill weight and disintegration time — is on the Lab Tests page. Three lines are worth pulling out here because they are the ones a hostile reader would find first.

The numbers we would rather you read here

Zinc measured 37.00 mg against a 25 mg claim, 148% of label. That is inside the manufacturer's acceptance range of 100–150%, and mineral overages of that size are common because a lot is formulated to stay above claim through its shelf life. It is also 92% of the 40 mg tolerable upper intake level for adults from all sources, which is a thin margin rather than an exceedance; we have raised it with the manufacturer for the next lot and we print the label claim, not the measured value, because that is what the panel is for. Vitamin C measured 222.86 mg against 200 mg, 111%, and grape seed extract 113.35 mg against 100 mg, 113%. None of those numbers would have been visible to you if the certificate were a badge.

What the certificate does not cover

It does not test for fish. The allergen screen covers gluten, soy and milk; fish is in the product by formulation — 250 mg of hydrolyzed marine collagen — so there is nothing to screen for, and it is declared in plain words on every page that lists the formula. The facility's GMP certificate has not reached us and is therefore not described. And the certificate is one lot: when the next lot is made, the next certificate will be published the same way, or the page will say that it has not been.

What did each of the 40 listings say about testing?

Every cell below records what the listing or brand site said about testing on the date read, and whether a document could be opened; "nothing found" means we looked at the gallery, the listing text and the brand's site where one exists and found no statement about testing or certification at all.

The rows are the same 40 products, in the same order, as the saw palmetto survey, where the serving, price and source of each one are recorded; the dataset there (CC BY 4.0) includes the certificate column. If a brand in this table publishes a certificate we did not find, write to support@bloohair.co with the link and we will correct the row, dated, at the top of this page.

Why does a published certificate matter more than a badge?

Because a badge can only be believed and a certificate can be checked: a reader who opens our certificate can see that zinc measured 148% of claim, that vitamin C measured 111%, and that the laboratory's specifications were supplied by us — three facts that no "third-party tested" badge in this table lets you learn about the product it sits on.

There is a second reason, and it is the one we would put first. A published certificate makes a brand accountable to its own label. Ours told us that six amounts on this site were wrong — keratin, marine collagen, MSM, silica, hyaluronic acid and ashwagandha, all overstated, all transcribed from artwork instead of from the document — and we corrected them the day the document arrived, with a dated note. That correction exists because the certificate was going to be published; a certificate kept in a drawer corrects nothing. When you weigh a $6.66-a-month product against an $88 one, or a proprietary blend against a printed dose, the question "can I open the lot's certificate?" is the cheapest test you can run, and on 7–9 September 2026 every product in this table failed it, including ours.

What else do people ask about hair supplement testing?

Does Nutrafol publish a certificate of analysis?

No document was found on nutrafol.com on 7 September 2026. Nutrafol Men and Nutrafol Men 50+ carry the NSF Certified for Sport mark on their labels and nutrafol.com describes the certification on its standards page; the certificate of analysis for a given lot, with its measured values, is not published there. Nutrafol's standards page offers a phone number for questions.

Is third-party testing required by law for supplements?

Testing is required; a third party is not, and publication is not. 21 CFR Part 111 requires the manufacturer to set specifications for each product, to verify the identity of every dietary ingredient and to confirm that each finished batch meets its specifications, and to keep the records. The testing may be done in-house or by a contract laboratory. Nothing in the rule requires the results to be shown to a buyer.

What does "third-party tested" on a label mean?

Only that the brand says a laboratory it does not own tested the product. The phrase does not tell you which laboratory, which lot, which tests or what the results were. Seven of the 40 products in this table print it or a close variant; none of the seven links it to a document. A certificate of analysis answers all four questions on one page.

Which hair supplement publishes its heavy-metal results?

Of the 40 products read on 7–9 September 2026, none published them on that date. Since 10 September 2026 BLOOHAIR MEN publishes the ICP-MS results for lot 0125269 in text: arsenic 0.858 mcg per unit (limit 3), cadmium 0.073 (limit 3), lead 0.831 (limit 10), mercury 0.035 (limit 3). We have not re-checked the other 39 products since their reading dates.

How do I get a certificate of analysis from a supplement brand?

Ask for it by lot number — the lot is printed on the bottle — and ask for the finished-product certificate, not the raw-material certificates. Two brands in this table say they will provide one on request: Life Extension (a summary) and Rainbow Nutrients. A brand that publishes the certificate saves you the email; a brand that refuses has told you something too.

Sources and dates of reading

The 40 listings and brand sites linked in the table, read 7, 8 and 9 September 2026 (America/Toronto); for each product we read the listing gallery and text and, where a brand site exists, the product page, help centre and quality or testing pages. Life Extension: lifeextension.com/about/life-extension-research/safety, read 7 September 2026. Nutrafol: nutrafol.com/standards/, read 5 and 7 September 2026. BLOOHAIR MEN: finished-product certificate of analysis for lot 0125269 from a US contract manufacturer, manufacturing date 12/2025, and allergen test report CTLA ID 156202, Contract Testing Laboratories of America, signed 19 December 2025 — both received 10 September 2026 and transcribed in full on the Lab Tests page. Regulation: 21 CFR Part 111, §§ 111.70, 111.75 and 111.95. Zinc upper intake level: 40 mg a day for adults, NIH Office of Dietary Supplements, Zinc fact sheet. Brand names belong to their owners; nothing here says any product is better or worse than another, only what each listing lets a buyer verify. These statements have not been evaluated by the Food and Drug Administration; no product in this table is intended to diagnose, treat, cure or prevent any disease.