Cosmetics · Marine ingredients
Fucoidan
フコイダン (Fukoidan)
Also known as: Sulfated Fucan Polysaccharide
4Japanese suppliers ready to quoteView on the Sourcing platformWhy now · 2020 — ongoing
Okinawa Longevity: Fucoidan, Mozuku, Getto, and Shikuwasa
Okinawa's marine and botanical ingredients ride the longevity narrative. We map fucoidan, mozuku, getto (alpinia), and shikuwasa, plus the FFC and clinical evidence base.
Read the trend reportAt a glance
| Category | Cosmetics |
|---|---|
| INCI name | Fucoidan (or species-specific Ferment / Extract) |
| Japanese labeling name | フコイダン |
| Common Japanese notations | フコイダン |
| Origin | Marine (sulfated polysaccharide from brown seaweeds) |
| Typical functions | Moisturizing, Skin conditioning, Functional food ingredient |
| Regulatory status in Japan | Cosmetic ingredient listed in the JSCI (Japanese Cosmetic Industry Association) labeling name dictionary. Food-grade preparations are recognized in supplement and functional food applications, with some notifications under the Foods with Function Claims system. |
Fucoidan is a sulfated polysaccharide found in brown seaweeds — most commonly sourced in Japan from mozuku (Cladosiphon okamuranus), kombu (Saccharina japonica), and related species. It has attracted significant research attention and is used as a standalone cosmetic and supplement ingredient in addition to being a component of whole-seaweed extracts.
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Classification
Tags below link to other ingredients sharing the same attribute, so you can pivot from one ingredient to its peers.
Product applications
Regulatory tags
Origin
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Face masks and essences
- Moisturizing serums
- Fucoidan supplements
Ingredient profile
Fucoidan is a family of sulfated polysaccharides containing fucose as their primary sugar, with variable proportions of galactose, xylose, mannose, uronic acids, and sulfate groups depending on species and extraction method. Commercial fucoidan is supplied under varying molecular weight and purity specifications.
The source species meaningfully affects the polysaccharide structure and functional profile. Mozuku-derived fucoidan and kombu-derived fucoidan are not identical materials and should not be treated as interchangeable without supplier specification sheet review.
OEM applications
In Japanese cosmetics, fucoidan appears in moisturizing face masks, essences, serums, and sometimes hair care. It is often paired with other seaweed extracts in marine-themed product ranges.
In supplements, fucoidan products are sold both under generic supplement positioning and under Foods with Function Claims notifications where specific claims have been submitted.
Regulatory classification in Japan
Listed in the JSCI Japanese Cosmetic Ingredient Codex under フコイダン and permitted as a cosmetic ingredient.
Specific fucoidan products with functional claims are notified under the Foods with Function Claims system; check the Consumer Affairs Agency database for specific ingredient-plus-claim combinations.
Regulatory classification in other markets
| EU | Fucoidan is listed in CosIng. Supplement-grade fucoidan for novel health claims may fall under the EU Novel Food regulation depending on the specific preparation and claim. |
|---|---|
| USA | Used in cosmetic and supplement products. FDA does not pre-approve most supplement ingredients, but manufacturers bear safety substantiation responsibility. |
| China | Cosmetic uses should be verified against IECIC. Supplement / health-food uses are subject to specific authority review. |
| Korea | Permitted in cosmetics. Functional health food uses require MFDS notification. |
Market reference formulations
Example finished products will be added after each product's current full ingredient list has been verified.
All brand names and product names referenced anywhere on this site are the property of their respective owners. Example entries are provided for informational purposes only and do not imply endorsement.
Alternative ingredients
Related ingredients commonly evaluated as substitutes.
Quick answers
- What is Fucoidan?
- Fucoidan is a sulfated polysaccharide found in brown seaweeds — most commonly sourced in Japan from mozuku (Cladosiphon okamuranus), kombu (Saccharina japonica), and related species. It has attracted significant research attention and is used as a standalone cosmetic and supplement ingredient in addition to being a component of whole-seaweed extracts.
- What is the regulatory status of Fucoidan in Japan?
- Cosmetic ingredient listed in the JSCI (Japanese Cosmetic Industry Association) labeling name dictionary. Food-grade preparations are recognized in supplement and functional food applications, with some notifications under the Foods with Function Claims system.
- What products typically use Fucoidan?
- Face masks and essences / Moisturizing serums / Fucoidan supplements
- Where does Fucoidan come from?
- Marine (sulfated polysaccharide from brown seaweeds)
- What is the INCI / JSCI labeling name for Fucoidan?
- INCI: Fucoidan (or species-specific Ferment / Extract) / JSCI: フコイダン
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Regulatory guidance
Take the next step
FAQ for OEM buyers
Q. Does fucoidan need EU Novel Food authorisation, or can we put it into a European supplement straight away?
Yes — for most preparations, fucoidan is treated as a novel food in the EU. Under Regulation (EU) 2015/2283 a food not consumed to a 'significant degree' in the EU before 15 May 1997 is a novel food and requires authorisation. As of writing, the only fucoidan extracts authorised under the EU Novel Food framework are the Maritech® extracts from Marinova (Undaria pinnatifida and Fucus vesiculosus), authorised at up to 250 mg/day for the general adult population (Belgian Superior Health Council notice, 5 December 2017). Fucoidan from Cladosiphon okamuranus (Okinawa mozuku) is widely used in Japan but has not, to our knowledge, received its own EU Novel Food authorisation as an isolated ingredient — buyers planning EU distribution should secure regulatory advice and not assume blanket fucoidan acceptance.
Sources · Last reviewed: 2026-04-26
Q. How does the source seaweed change the fucoidan you actually receive?
Fucoidan is a family of sulfated polysaccharides — not a single defined molecule — and the source species materially changes the structure. Mozuku-derived fucoidan (Cladosiphon okamuranus) has been structurally characterised as having a backbone of α-1,3-linked fucose units with sulfation primarily at C-4 and a sulfate content reported around 9.8–17.6% w/w depending on the extraction. Kombu-derived (Saccharina japonica) and wakame-derived (Undaria pinnatifida) fucoidans have different branching, sulfation positions, and fucose:galactose ratios. Treat them as different ingredients on the spec sheet: at minimum, request fucose %, total sulfate %, average molecular weight (or MW distribution), and uronic-acid % per lot.
Q. What is fucoidan's regulatory status in the United States?
Fucoidan is sold in the US as a dietary supplement ingredient under DSHEA. Marinova's Maritech fucoidan extracts (from Undaria pinnatifida and Fucus vesiculosus) received FDA 'no questions' GRAS notification responses in 2017 (GRN 661 covers Fucus vesiculosus concentrate), making them suitable for use in conventional food categories at specified levels (typically up to 250 mg/day in supplement form, lower per-serving levels in conventional foods). For other fucoidan preparations, supplement use under DSHEA is permitted but the manufacturer carries the safety-substantiation responsibility, and food (non-supplement) use should be backed by either a self-affirmed GRAS dossier or an FDA GRAS notification.
Q. Can fucoidan supplements carry health claims in Japan under the Foods with Function Claims (FFC) system?
Yes — but the claim must be tied to a specific ingredient-plus-dose combination supported by evidence submitted to the Consumer Affairs Agency (Consumer Affairs Agency, CAA). FFC is a notification system (not a pre-approval system like Tokuho/FOSHU): the producer submits the evidence dossier, and the CAA accepts the notification rather than 'approving' the product. Several mozuku-derived fucoidan FFC notifications have been accepted in Japan, including one for Okinawa mozuku fucoidan with a bowel-function-related claim. Brands considering FFC positioning need to (a) identify a specific endpoint with adequate clinical evidence, (b) build their own systematic-review-backed dossier, and (c) note that the IP and dosing of the underlying clinical evidence may constrain who can credibly file.
Sources · Last reviewed: 2026-04-26
Use cases
Anti-aging facial serum / essence (cosmetic)
- Positioning
- Marine bioscience / 'Japanese ocean heritage' moisturising story
- Typical usage level
- 0.1–1.0% w/w of fucoidan-standardised extract; higher if using a whole-seaweed extract
- Formulation notes
- Fucoidan is a high-molecular-weight, water-soluble polysaccharide and contributes to viscosity; add to the aqueous phase before emulsification. Pair with hyaluronic acid for a layered moisturisation story. Note that the cosmetic INCI label is 'Fucoidan' regardless of seaweed source — for marketing claims tied to a specific seaweed (e.g., Okinawa mozuku), the source should be substantiated in marketing copy and on the spec sheet.
Immune-support / general wellness supplement (capsule or tablet)
- Positioning
- Japanese mozuku heritage, immune-modulation positioning grounded in published Cladosiphon-fucoidan research
- Typical usage level
- Commonly 100–300 mg fucoidan per daily serving; the Marinova Maritech precedent is up to 250 mg/day in EU/US authorised use
- Formulation notes
- For US sales, structure-function claim language must be DSHEA-compliant; avoid disease claims. For Japan, evidence-backed FFC notification is the route to specific functional claims. Note immune-modulation evidence in humans is preliminary — pilot RCTs exist (e.g., NK-cell pilot study with Cladosiphon okamuranus fucoidan) but should not be overstated.
Hydrating sheet mask (cosmetic)
- Positioning
- Marine-themed range; pairs naturally with seaweed extracts and minerals
- Typical usage level
- 0.05–0.5% w/w fucoidan in the impregnating essence
- Formulation notes
- Fucoidan's high water-binding capacity contributes to immediate sensorial moisturisation. The brown-seaweed origin can produce a faint colour in the essence — formulators often pair with a mild chelator and antioxidant to maintain visual stability over the product's shelf life.
Functional beverage / shot (Japan-domestic FFC opportunity)
- Positioning
- Bowel-function or general wellness, leveraging existing FFC precedent for Okinawa mozuku fucoidan
- Typical usage level
- Per the FFC notification dossier referenced in the SKU; varies by submitted evidence
- Formulation notes
- Functional beverages must replicate the fucoidan species, dose, and matrix used in the underlying clinical evidence to be defensible under FFC. For pH-sensitive formulations, fucoidan is generally stable across mildly acidic to neutral pH but should be validated in the specific beverage system.
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Official regulatory databases
External links to public Japanese / international regulatory authorities. We are not affiliated.
References
- JSCI (Japanese Cosmetic Industry Association) labeling name directory — フコイダン
- EU CosIng entry: Fucoidan
Last updated: 2026-04-22. Ingredient entries are reviewed at least annually against current regulatory listings.