Which Hair Supplements Contain Marine Collagen — and Is It Declared as a Fish Allergen?
We read the labels of 40 men's and unisex hair supplements. Twelve contain collagen. Six of those twelve contain collagen made from fish — and fish is one of the nine allergens that United States law requires a food label to declare by name. This is what each of the six says, and what ours says.
Collagen is the second most common marketing word on a hair supplement bottle, after biotin. It is also the ingredient most likely to arrive from an animal whose name never appears on the front of the package. “Marine collagen” sounds like a provenance. It is an allergen.
This article uses the same sample as our other label surveys: 40 products sold to men in the United States, labels read between 7 and 9 September 2026 from the brand's own page or the product listing's label image. Our own product was read again on 25 September 2026, on the page that serves it. Every figure below carries the place it was read and the day it was read, and where a label could not be read, the row says so instead of guessing.
Which hair supplements contain marine collagen?
Six of the 40 hair supplements we read contain collagen derived from fish: Nutrafol Men, Force Factor Hair Growth Accelerator Pro, Lunakai Pro, Clean Nutraceuticals Collagen Pills, NEW AGE Biotin Collagen & Keratin, and BLOOHAIR MEN. Twelve of the 40 contain collagen from any source.
Of the twelve products that contain collagen, six use a marine source, four name a bovine source, and two name no source at all. That last number is the one worth pausing on: two labels in the sample print the word “collagen” in a blend and never say what animal it came from. TRU BLOOM lists collagen inside a 325 mg Proprietary Hair Superfood Blend, and Micro Ingredients lists hydrolyzed collagen at 50 mg. Neither names a species, a genus, or even a kingdom. A buyer who avoids fish cannot clear either product from the label alone.
The six, and what each one prints
| Product | How the collagen is named | Amount published? | Fish declaration, as read |
|---|---|---|---|
| Nutrafol Men (Core) | Hydrolyzed marine collagen, inside the Synergen Complex | No — the complex is 1,720 mg for six ingredients together | “CONTAINS: Fish (Cod, Haddock, Pollock)”, on the label image |
| Force Factor Hair Growth Accelerator Pro for Men | Marine collagen peptides, on its own line | Yes — 400 mg, on the label image | “Contains: Fish”; our read records no species |
| Lunakai Pro Men's Hair Growth & Restore | Marine collagen, on its own line | Yes — 400 mg, in the listing text | None found in the listing text we read |
| Clean Nutraceuticals Collagen Pills + Biotin + Keratin | Fish, one of four sources inside the Clean MultiMane Collagen Proprietary Complex | No — 1,000 mg covers bovine, chicken, fish and eggshell together | Fish named inside the ingredient line |
| NEW AGE Biotin Collagen & Keratin Beauty Complex | Marine, one of four sources inside the Multi Collagen Complex | No — 1,000 mg covers bovine, chicken, marine and eggshell together | “Contains: Fish (Snapper), Egg” |
| BLOOHAIR MEN | Hydrolyzed Marine Collagen (fish), on its own line | Yes — 250 mg, in selectable text | “Contains: fish (hydrolyzed marine collagen)” on the product page and the Lab Tests page — and not on the bottle. See below. |
What the table is and is not
Each row is what one label or one product page said on the day we read it. A printed carton can carry a line that an online photograph does not show, and a brand can change a label between our reading and yours. Where we found nothing, the row says we found nothing — not that nothing exists. The figures in the first survey of this sample, where we counted how many of the 40 publish the amount of each ingredient, were built the same way and under the same limits.
Is fish an allergen a label has to declare?
Yes. Fish is one of nine major food allergens under United States law, and a food that contains one must declare it either in parentheses inside the ingredient list or in a “Contains” statement next to the list. For fish, the law asks for the species, not just the word “fish”.
The definition sits in the Federal Food, Drug, and Cosmetic Act. 21 U.S.C. 321(qq), read on 25 September 2026, defines a major food allergen as “Milk, egg, fish (e.g., bass, flounder, or cod), Crustacean shellfish (e.g., crab, lobster, or shrimp), tree nuts (e.g., almonds, pecans, or walnuts), wheat, peanuts, soybeans, and sesame”, together with any food ingredient that contains protein derived from one of them. Hydrolyzed marine collagen is protein derived from fish. It is inside the definition, not near it.
The declaration itself is governed by 21 U.S.C. 343(w), also read on 25 September 2026, which gives a label two ways to do it: the food source printed in parentheses after the ingredient in the ingredient list, or “the word ‘Contains’, followed by the name of the food source from which the major food allergen is derived”, printed immediately after or adjacent to the ingredient list. The FDA's own summary of the rules, read the same day, states both routes in the same terms and gives the examples “lecithin (soy)” and “Contains wheat, milk, and soy.”
Why the species matters
Both the statute and the FDA say the same thing about fish: the name of the food source means “the name of the specific type of nut or species of fish”. The FDA page gives bass, flounder and cod as examples. That is not pedantry. Fish allergy is frequently species-specific, and a man who reacts to cod may eat pollock without trouble, or not — he needs the name to find out. Of the three products in our six that carry an explicit “Contains” statement, two name the fish: Nutrafol Men names cod, haddock and pollock, and NEW AGE names snapper. The third, as we read it, says only “Fish”.
Dietary supplements are foods
Nothing in the definition carves out capsules. A dietary supplement is a food under the Act, which is why the Supplement Facts panel itself is specified in food regulations — 21 CFR 101.36, read 25 September 2026 — rather than in drug regulations. The same body of law that tells a label to print the total weight of a proprietary blend tells it to declare the fish.
How do the six marine collagen products declare the fish?
Three of the six carry an explicit “Contains” statement naming fish, and two of those three name the species. One names fish only inside the ingredient line. One carried no fish declaration in the text we read. One — ours — declares it on the website and not on the bottle.
Read as a group, the six split into three habits.
The ones that say it plainly
Nutrafol Men and NEW AGE both print a “Contains” line with a species in it. Nutrafol's reads “CONTAINS: Fish (Cod, Haddock, Pollock)”. NEW AGE's reads “Contains: Fish (Snapper), Egg”. On the narrow question this article asks, both labels do what the law describes.
There is a second half to that sentence for Nutrafol. The declaration is on the label, and the label is an image behind a button. We re-read the Nutrafol Men product page on 25 September 2026: the panel is still served as a picture behind “View Supplement Label”, and the page text itself still runs through “Gluten-free”, “Dairy-free”, “Soy-free” and “Non-GMO tested” without a word about fish. A shopper who reads the page and not the photograph reads four reassurances and no allergen. We take that panel apart line by line in our breakdown of what is in Nutrafol Men.
The ones where the fish is real and the amount is not
Clean Nutraceuticals and NEW AGE both sell a multi-source collagen: bovine, chicken, fish and eggshell in one number. Clean Nutraceuticals prints 1,000 mg for the Clean MultiMane Collagen Proprietary Complex; NEW AGE prints 1,000 mg for its Multi Collagen Complex. In both cases the fish is disclosed as present and undisclosed as a quantity. It could be 900 mg of the thousand or it could be 10. Nutrafol's marine collagen sits in the same position for a different reason: the Synergen Complex prints 1,720 mg for six ingredients, so the arithmetic floor for any one of them is 287 mg and the ceiling is the whole blend.
This is legal, and it is worth saying so plainly, because an article that implies otherwise is easy to dismiss. 21 CFR 101.36(c)(3) requires a proprietary blend to publish one number, “the total weight of all other dietary ingredients contained in the proprietary blend”, and (c)(2) requires the ingredients inside it to be listed in descending order of predominance by weight. A brand that uses a blend has complied with both. It has simply told you less.
The one we could not find a declaration for
Lunakai Pro publishes its marine collagen at 400 mg in the listing text — one of only two products in the whole sample of 40 whose amounts we could read as text rather than as a photograph. In the text we read on 7 September 2026, we found no “Contains: Fish” statement. We are reporting the absence of a line in one reading of one listing, not the absence of a line on a printed bottle we have never held. If Lunakai's carton carries the statement, the carton is the record and this paragraph is the correction.
Why does Viviscal declare mollusks instead of fish?
Because mollusks are not major food allergens under United States law. Only crustacean shellfish are. Viviscal Man's marine ingredient is declared “CONTAINS: MOLLUSKS”, which is a voluntary disclosure the law does not require.
Viviscal Man is the seventh marine product in the sample and it is not in the table above, because AminoMar is described as a marine complex rather than as collagen. Its label, read 7 September 2026, declares mollusks. Read the list in 21 U.S.C. 321(qq) again and count: milk, egg, fish, crustacean shellfish, tree nuts, wheat, peanuts, soybeans, sesame. Clams, oysters, mussels and scallops appear nowhere. The FDA page says the same when it lists the nine and gives crab, lobster and shrimp as the shellfish examples.
A voluntary line is still a useful line
Viviscal was not obliged to print that word and printed it. We are not in the business of calling that a trick. It is the opposite: it is a brand telling a buyer something the law lets it keep quiet. The only reason it belongs in this article is that a man scanning labels for “fish” will not find it on Viviscal, and a man allergic to mollusks will not find a required declaration on anything else in the sample.
The quantity is still missing
AminoMar is a proprietary marine complex at 545 mg per tablet, and Viviscal Man's panel publishes no amount for its constituents. On the disclosure question that runs through all of these surveys, it scores the same as the blends above.
How much marine collagen is in a men's hair supplement?
Of the six products that contain it, three publish an amount: 400 mg, 400 mg and 250 mg per daily serving. The other three keep it inside a blend of 1,000 mg, 1,000 mg and 1,720 mg. Every published figure is a fraction of the dose used in the published collagen trials.
The three published amounts are Force Factor at 400 mg, Lunakai at 400 mg and BLOOHAIR MEN at 250 mg. That is the whole range a buyer can actually see. The median of a sample of three is not a statistic worth the word, so we will not dress it as one.
What the published trials used
The best-known controlled trial of oral collagen peptides is Proksch and colleagues, Skin Pharmacology and Physiology 2014;27(1):47–55, DOI 10.1159/000351376, which we read on PubMed on 25 September 2026. Sixty-nine women aged 35 to 55 took 2.5 g or 5.0 g of collagen hydrolysate once daily for eight weeks. The outcomes were skin elasticity, skin moisture, transepidermal water loss and skin roughness. Hair was not measured.
Two things follow, and both of them are uncomfortable for the category rather than for any one brand. The smallest dose in that trial is 2.5 g: ten times the 250 mg in our own capsule, and six times the 400 mg in the two largest published doses in the sample. And the trial measured skin. A hair supplement that cites collagen research is usually citing skin research, at a dose it does not contain.
Why we print the number anyway
Because a number you can see is a number you can argue with. 250 mg against a 2.5 g trial dose is a comparison a reader can run in one line, and it is the comparison we would rather they run than take a blend weight on trust. The brands that print 1,000 mg for four collagen sources have removed that possibility from the conversation. We set out our own limits in the same words on the Supplement Facts page, where the sentence about collagen has been sitting since the page went up.
What does the BLOOHAIR MEN label do, and what does it not do?
BLOOHAIR MEN contains 250 mg of hydrolyzed marine collagen per four-capsule serving, printed as text with its own figure, and the fish is declared on the product page and the Lab Tests page. It is not declared on the bottle: the printed panel reads “Hydrolyzed Marine Collagen” with no “Contains” line anywhere on it.
That second sentence is the one this article exists to print. We hold 39 other labels to the standard in section two of this page, so here is ours against the same standard, in the words already published on our own Supplement Facts page: “The BLOOHAIR MEN bottle does neither: the panel reads ‘Hydrolyzed Marine Collagen’ and there is no ‘Contains’ line anywhere on it.” And: “An allergic buyer reading ‘gluten free · soy free · no dairy’ on the front could reasonably conclude that allergens had been dealt with, and ‘marine’ is not a word that warns anybody.”
The declaration is made on the website, in the panel and next to it, on the product page and on the Lab Tests page. If you are allergic to fish, take it from those pages and not from the bottle. We would rather publish that sentence than wait for a version of it that flatters us.
Why our allergen report does not test for fish
The allergen screen on lot 0125269, signed 19 December 2025 by Contract Testing Laboratories of America and published in full on our Lab Tests page, covers three allergens by ELISA: gluten below 4 ppm, soy below 0.04 ppm, milk below 0.4 ppm. It does not test for fish.
That is not an omission, and the distinction is the whole logic of allergen testing. A screen looks for what should not be there — traces from a shared line, a shared scoop, a shared room. Fish is in BLOOHAIR MEN on purpose, at 250 mg, by formulation. You do not screen a product for its own ingredient; you declare it. What the report does prove is the three badges on the front of the bottle, which is exactly as far as it goes and no further.
The amount is on a certificate, not only on a label
A printed dose is a claim. On lot 0125269 the finished-product certificate of analysis measured the hydrolyzed marine collagen at 250.00 mg by FTIR against a 250.00 mg claim — 100 percent of label. The same certificate is where we found that our zinc came in at 37 mg against a 25 mg claim, which we published too, and which is the subject of our survey of which hair supplements publish a certificate at all. Of the 40 products in this sample, that survey found the answer was none of them until we published ours.
What can you verify about the collagen before you pay?
On 34 of the 40 labels in this sample the Supplement Facts panel is served as a photograph, and on only two of the 40 does every ingredient carry its amount in selectable text. BLOOHAIR MEN publishes all 22 of its actives in text, with 1,958 mg attributable to a named ingredient, against 10 of 24 and 93 mg for Nutrafol Men.
The collagen question is a small instance of the question the whole category turns on: can a buyer put a number on what he is swallowing without asking anyone's permission. Here are the two labels side by side, on the measures that do not depend on anybody's opinion.
| BLOOHAIR MEN | Nutrafol Men (Core) | |
|---|---|---|
| Actives carrying a published dose | 22 of 22, in selectable text | 10 of 24 |
| Milligrams attributable to a named ingredient, per serving | 1,958 mg | 93 mg |
| Milligrams inside a proprietary blend | 0 mg | 2,295 mg (Synergen Complex 1,720 mg + Nutrafol Blend 575 mg) |
| Marine collagen amount | 250 mg, printed | Not published; inside the 1,720 mg complex |
| Fish declared | Yes, on the product page and Lab Tests page; not on the bottle | Yes, on the label image; not in the page text read 25 September 2026 |
| Amount confirmed by a published certificate of analysis | Yes — 250.00 mg measured, lot 0125269 | No certificate published |
| Supplement Facts panel | Text you can select and copy | Image behind “View Supplement Label” |
What the 1,958 mg is
It is the sum of every amount printed on our panel: 248 mg of vitamins and minerals, 600 mg across the five ingredients of the Men's Hair Vitality Complex, and 1,110 mg across the ten of the Bloohair Blend. Both of those headings look like proprietary blends and are not: every line under them carries its own figure, which is why they can be added up at all. The whole panel, with the percent Daily Value column the printed bottle does not carry, is on the Supplement Facts page, and the certificate behind it is on the Lab Tests page.
If you are allergic to fish and you are shopping this category
Read the ingredient list for the words collagen, marine, and the name of a fish, and then read the line next to the ingredient list. If the collagen sits inside a blend with three other sources, you have learned that fish is present and nothing about how much. If the panel is a photograph, save it and zoom in; on 34 of the 40 labels in this sample that is the only way to read the amounts at all. And if a label says collagen without saying where it came from — two of the twelve in this sample do — treat it as unanswered rather than as safe.
Our panel is published as text for that reason, and every dose in it, collagen included, is on the product page before you reach a price.
Common questions
Does BLOOHAIR MEN contain fish?
Yes. Each four-capsule serving contains 250 mg of hydrolyzed marine collagen, which is fish-derived. It is declared on the product page and the Lab Tests page. It is not declared in a “Contains” statement on the current bottle, and if you are allergic to fish you should take that from these pages rather than from the label.
Which hair supplements contain marine collagen?
Of 40 men's and unisex hair supplements whose labels we read between 7 and 9 September 2026, six contain fish-derived collagen: Nutrafol Men, Force Factor Hair Growth Accelerator Pro, Lunakai Pro, Clean Nutraceuticals Collagen Pills, NEW AGE Biotin Collagen & Keratin, and BLOOHAIR MEN. Twelve of the 40 contain collagen from any source, and two of those twelve name no source at all.
Is marine collagen a declarable allergen in the United States?
Yes. 21 U.S.C. 321(qq) defines fish as a major food allergen and includes any food ingredient containing protein derived from it, which covers hydrolyzed marine collagen. 21 U.S.C. 343(w) requires the food source to appear either in parentheses in the ingredient list or in a “Contains” statement next to it, and for fish the law asks for the species.
How much marine collagen is in BLOOHAIR MEN?
250 mg per four-capsule daily serving, printed as text on the panel. On lot 0125269 the finished-product certificate of analysis measured it at 250.00 mg by FTIR, 100 percent of the label claim. For context, the smallest dose in the Proksch 2014 controlled trial of collagen peptides was 2.5 g a day, ten times that amount, and that trial measured skin rather than hair.
Is collagen from mollusks the same as fish for allergy purposes?
No. Under United States law the shellfish allergen category is crustacean shellfish — crab, lobster, shrimp — and mollusks such as clams, oysters, mussels and scallops are not major food allergens. Viviscal Man declares “CONTAINS: MOLLUSKS” for its AminoMar marine complex, which is a voluntary disclosure rather than a required one, and it is a different allergen from fish.
Sources and dates of reading
Labels of the 40 products: brand pages and product listing label images, read 7 to 9 September 2026; the dataset behind this sample was published with our saw palmetto survey under CC BY 4.0. Nutrafol Men product page, read 25 September 2026. BLOOHAIR MEN Supplement Facts and Lab Tests pages, read 25 September 2026. 21 U.S.C. 321(qq) and 343(w), Office of the Law Revision Counsel, read 25 September 2026. FDA, Food Allergies, read 25 September 2026. 21 CFR 101.36, eCFR, read 25 September 2026. Proksch E et al., Skin Pharmacol Physiol 2014;27(1):47–55, DOI 10.1159/000351376, read on PubMed 25 September 2026. Certificate of analysis and allergen report for lot 0125269, transcribed in full on the Lab Tests page; the allergen report was signed by Contract Testing Laboratories of America on 19 December 2025.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not medical advice. Speak with your healthcare provider before starting any supplement, especially if you are taking medication or managing a medical condition. Biotin may interfere with laboratory tests.