A spray-dried extract of two brown seaweeds, mekabu (the sporophyll of wakame, Undaria pinnatifida) and Ascophyllum nodosum, combined and extracted together. Fucoidan is specified at not less than 25%, calculated from fucose by HPLC, and the producer's reference intake is 100 mg per day. Packed in 1 kg aluminium bags, with a shelf life of 3 years from manufacture.
Tell us what you are developing and which documents you need. We reply from Japan within one working day with the product specification, SDS and the CoA of the current lot.
The two seaweeds are combined before extraction and extracted together, and the extract is spray-dried as it is. The producer made it a mixed extract on purpose and designed the process so that fucoidan and the smaller components of the seaweeds stay in the powder instead of being removed by purification.
Step 1 · mekabu + Ascophyllum nodosum
Mekabu is the frilled sporophyll at the base of wakame; Ascophyllum is a rockweed of the North Atlantic
Step 2 · before extraction
The two seaweeds are mixed first, not blended after separate extraction
Step 3 · one extract
Process designed to keep fucoidan and the low-molecular components rather than purify them out
Step 4 · extract dried as it is
No further processing between extraction and drying
Step 5 · 40 mesh, moisture max. 10%
Light brown to brown powder with a seaweed odour and taste
Step 6 · fucoidan by HPLC
Plus heavy metals, total plate count, coliforms, yeasts and moulds
Step 7 · 1 kg aluminium bag
Shelf life 3 years from the date of manufacture
The grade on this page. Other grades, where available, are specified on request.
Example lot values are published in the developer's guide below. They are an example, not a specification; your lot's CoA governs.
A Japanese trading company selling directly to brand owners and contract manufacturers. No distributor layer between you and the documents.
Every shipment travels with the Certificate of Analysis of its own lot, with the measured values and the full safety panel.
A small first order lets you run a pilot batch before committing to bulk. Larger volumes are quoted by volume and delivery terms.
For registered companies developing a product. Tell us the format you plan and we will say honestly what to expect.
After payment is received. Freight quoted on request. Specification and SDS before you order, CoA with the goods.
If you are comparing ingredients for a new SKU, these questions separate one material from another quickly.
Both seaweeds in this extract are brown seaweeds, which carry iodine and arsenic, and neither is in the producer specification. Limits differ by market, so ask for the lot data before you fix the serving size.
Here fucoidan is calculated from fucose measured by HPLC. Other suppliers use other methods, and the same material can give different numbers. Compare the method as well as the percentage, or test both samples in one lab.
The powder contains 6.74 g of sodium per 100 g. At 100 mg per day that is about 7 mg of sodium per serving; at higher inclusion rates, check it against your nutrition label.
Seaweeds have a long food history, but a concentrated extract can be assessed separately from the whole seaweed, and some markets list specific fucoidan extracts with their own specifications. Check the status for your destination before the first order.
No certificate is on file for this extract. In the UAE, supplements need a halal certificate. If your market or brand needs one, ask us before you order.
The producer's documents are in Japanese. Tell us at the inquiry stage which parameters your importer expects on the CoA, and whether you need an SDS, allergen or GMO statement.
What each component is, what the processing changes, and what published research on the raw material has examined. No health claims; references on request.
Fucoidan Seaweed Extract Powder is a fucoidan-bearing extract of two brown seaweeds, mekabu and Ascophyllum nodosum, combined before extraction and extracted together. It is a whole extract, not an isolated fucoidan: the specification guarantees fucoidan at not less than 25%, calculated from fucose, and the rest of the powder is the other components of the two seaweeds, including dietary fibre and their natural salt. Iizuka Shoukai supplies it from Japan to brand owners and contract manufacturers.
At the producer's reference intake of 100 mg per day, the extract takes little room in a capsule, tablet or stick pack, so it can sit next to other actives in one serving. It suits formulas that need a seaweed-derived fucoidan source with a short label declaration: seaweed (Ascophyllum nodosum, mekabu) extract. If your concept calls for a different brown-seaweed ingredient, compare it with our Ascophyllan Extract Powder, standardised to ascophyllan from Ascophyllum nodosum alone, and our Ecklonia Stolonifera Extract Powder, a hot-water extract of a Japanese kelp used at gram level.
Capsules, tablets and stick packs are the practical formats at 100 mg per day; one kilogram covers 10,000 daily servings. The powder is light brown with a seaweed odour and taste, so in drinks and sachets plan for the flavour and for the sodium it brings.
Tell us your format, target market and the other actives in the formula. We check the documents your market needs, including iodine and arsenic data for the lot, before you commit to a trial. If you would rather receive a finished private-label product than the raw powder, see our Japanese supplement ingredients and contract manufacturing.
Fucoidan is the collective name for the sulfated polysaccharides of brown seaweeds that are built mainly from the sugar L-fucose. Most fucoidans also carry other sugars, such as galactose, xylose, mannose and glucuronic acid, and their backbone, branching and sulfate pattern change with the seaweed species, the growing conditions and the extraction method (Carbohydr Polym 2026; 380: 125134).
That is why a fucoidan from one seaweed cannot simply stand in for a fucoidan from another. Even two North Atlantic seaweeds of the same order that are both popular commercial sources, Fucus vesiculosus and Ascophyllum nodosum, give fucoidan preparations that differ considerably in the amount and chemical nature of their components (Mar Drugs 2022; 20(10): 638).
Mekabu is the thick, frilled sporophyll that grows at the base of the wakame stalk and carries its spores. It is eaten in Japan and Korea, and its slippery texture comes mainly from alginic acid and fucoidan. Research describes the fucoidan of wakame sporophylls as a galactofucan, a fucoidan in which galactose sits alongside fucose in the chain (Mar Drugs 2022; 20(7): 412).
Ascophyllum nodosum is a brown seaweed of the rockweed family that grows mainly along the coasts of Northern Europe and North America. It is an industrial source of alginic acid, and in Norway the dried seaweed is also drunk as a tea. Its fucoidan differs from that of its close relative Fucus vesiculosus (Mar Drugs 2022; 20(10): 638), and from the galactofucan of wakame. Combining the two seaweeds puts both kinds of fucoidan into one extract.
Extraction and purification decide what ends up in a fucoidan ingredient. Purification can raise the fucoidan share, but molecular weight, sugar make-up and sulfate content depend on the seaweed and on the technique, and some techniques remove sulfate groups or break the chains into smaller pieces (Food Res Int 2017; 99: 1011-1020).
This extract takes the other route. The producer designed the process to keep fucoidan and the smaller seaweed components in the powder rather than purify them out, and dries the extract directly. The result is a whole extract with a stated fucoidan minimum, not a high-purity fucoidan.
A fucoidan percentage depends on how it is measured. This specification calculates fucoidan from fucose determined by HPLC. Other methods can give a different number for the same material; in a 2026 method study, the common phenol-sulfuric acid test for total sugars recovered less than 40% of fucoidans (Carbohydr Res 2026; 562: 109835). When you compare offers, compare the method as well as the percentage.
Fucoidan is a large molecule and was long thought to pass through the gut unabsorbed. Researchers in Japan have reported fucoidan in serum and urine after oral intake of purified fucoidan, and in the urine of several volunteers after they ate Okinawa mozuku seaweed (J Nutr Sci Vitaminol 2017; 63(6): 419-421). This is a question of absorption, not of effect.
The producer's technical file reports cell-based assays, an animal study, a two-week pilot with nine adults and skin-cell assays. It also reports a size-exclusion HPLC run that showed a peak in the retention window used for exosome-like vesicles; this is a single analytical observation, not a characterisation. All of this is unpublished producer data. We make no claims from it; the wording a finished product can carry is set by the rules of its market.
The producer reports an acute oral toxicity study in mice with an LD50 of at least 5,000 mg/kg body weight, and a negative Ames test. Brown seaweeds carry iodine and arsenic and neither is in this specification, so request lot data for both and check them against the limits of your market.
Plan it as a milligram-level ingredient: 100 mg per day gives 10,000 servings per kilogram. The powder contains 6.74 g of sodium per 100 g, about 7 mg at 100 mg per day, which matters only at higher inclusion rates.
Start at the minimum order. Free sample. Specification, SDS and lot CoA on request.
Request a sample or quotationFucoidan Seaweed Extract Powder is a fucoidan-bearing extract of two brown seaweeds, mekabu and Ascophyllum nodosum, combined before extraction and extracted together. It is a whole extract, not an isolated fucoidan: the specification guarantees fucoidan at not less than 25%, calculated from fucose, and the rest of the powder is the other components of the two seaweeds, including dietary fibre and their natural salt. Iizuka Shoukai supplies it from Japan to brand owners and contract manufacturers.
At the producer's reference intake of 100 mg per day, the extract takes little room in a capsule, tablet or stick pack, so it can sit next to other actives in one serving. It suits formulas that need a seaweed-derived fucoidan source with a short label declaration: seaweed (Ascophyllum nodosum, mekabu) extract. If your concept calls for a different brown-seaweed ingredient, compare it with our Ascophyllan Extract Powder, standardised to ascophyllan from Ascophyllum nodosum alone, and our Ecklonia Stolonifera Extract Powder, a hot-water extract of a Japanese kelp used at gram level.
Capsules, tablets and stick packs are the practical formats at 100 mg per day; one kilogram covers 10,000 daily servings. The powder is light brown with a seaweed odour and taste, so in drinks and sachets plan for the flavour and for the sodium it brings.
Tell us your format, target market and the other actives in the formula. We check the documents your market needs, including iodine and arsenic data for the lot, before you commit to a trial. If you would rather receive a finished private-label product than the raw powder, see our Japanese supplement ingredients and contract manufacturing.
Fucoidan is the collective name for the sulfated polysaccharides of brown seaweeds that are built mainly from the sugar L-fucose. Most fucoidans also carry other sugars, such as galactose, xylose, mannose and glucuronic acid, and their backbone, branching and sulfate pattern change with the seaweed species, the growing conditions and the extraction method (Carbohydr Polym 2026; 380: 125134).
That is why a fucoidan from one seaweed cannot simply stand in for a fucoidan from another. Even two North Atlantic seaweeds of the same order that are both popular commercial sources, Fucus vesiculosus and Ascophyllum nodosum, give fucoidan preparations that differ considerably in the amount and chemical nature of their components (Mar Drugs 2022; 20(10): 638).
Mekabu is the thick, frilled sporophyll that grows at the base of the wakame stalk and carries its spores. It is eaten in Japan and Korea, and its slippery texture comes mainly from alginic acid and fucoidan. Research describes the fucoidan of wakame sporophylls as a galactofucan, a fucoidan in which galactose sits alongside fucose in the chain (Mar Drugs 2022; 20(7): 412).
Ascophyllum nodosum is a brown seaweed of the rockweed family that grows mainly along the coasts of Northern Europe and North America. It is an industrial source of alginic acid, and in Norway the dried seaweed is also drunk as a tea. Its fucoidan differs from that of its close relative Fucus vesiculosus (Mar Drugs 2022; 20(10): 638), and from the galactofucan of wakame. Combining the two seaweeds puts both kinds of fucoidan into one extract.
Extraction and purification decide what ends up in a fucoidan ingredient. Purification can raise the fucoidan share, but molecular weight, sugar make-up and sulfate content depend on the seaweed and on the technique, and some techniques remove sulfate groups or break the chains into smaller pieces (Food Res Int 2017; 99: 1011-1020).
This extract takes the other route. The producer designed the process to keep fucoidan and the smaller seaweed components in the powder rather than purify them out, and dries the extract directly. The result is a whole extract with a stated fucoidan minimum, not a high-purity fucoidan.
A fucoidan percentage depends on how it is measured. This specification calculates fucoidan from fucose determined by HPLC. Other methods can give a different number for the same material; in a 2026 method study, the common phenol-sulfuric acid test for total sugars recovered less than 40% of fucoidans (Carbohydr Res 2026; 562: 109835). When you compare offers, compare the method as well as the percentage.
Fucoidan is a large molecule and was long thought to pass through the gut unabsorbed. Researchers in Japan have reported fucoidan in serum and urine after oral intake of purified fucoidan, and in the urine of several volunteers after they ate Okinawa mozuku seaweed (J Nutr Sci Vitaminol 2017; 63(6): 419-421). This is a question of absorption, not of effect.
The producer's technical file reports cell-based assays, an animal study, a two-week pilot with nine adults and skin-cell assays. It also reports a size-exclusion HPLC run that showed a peak in the retention window used for exosome-like vesicles; this is a single analytical observation, not a characterisation. All of this is unpublished producer data. We make no claims from it; the wording a finished product can carry is set by the rules of its market.
The producer reports an acute oral toxicity study in mice with an LD50 of at least 5,000 mg/kg body weight, and a negative Ames test. Brown seaweeds carry iodine and arsenic and neither is in this specification, so request lot data for both and check them against the limits of your market.
Plan it as a milligram-level ingredient: 100 mg per day gives 10,000 servings per kilogram. The powder contains 6.74 g of sodium per 100 g, about 7 mg at 100 mg per day, which matters only at higher inclusion rates.
It is a whole co-extract of two brown seaweeds, mekabu and Ascophyllum nodosum, with fucoidan specified at not less than 25%, calculated from fucose by HPLC. It is not a purified fucoidan: the producer designed the process to keep fucoidan and the smaller seaweed components together and spray-dries the extract directly. Our Ascophyllan Extract Powder is a different product, standardised to ascophyllan from Ascophyllum nodosum alone.
Iizuka Shoukai supplies Fucoidan Seaweed Extract Powder from a 1 kg minimum order, packed in 1 kg aluminium bags, and sends the price for your volume with the quotation. Larger orders are quoted by volume and freight is quoted on request. Material ships from Japan 1-1.5 weeks after payment when stock is available; otherwise timing is confirmed in your quotation. Payment is 100% prepayment by SWIFT or Stripe. A free 20 g evaluation sample is available for registered companies developing a product.
The producer's reference intake is 100 mg per day, so one kilogram covers 10,000 daily servings. At that level the extract fits easily into a capsule, tablet or stick pack next to other actives. The powder is light brown with a seaweed odour and taste and contains 6.74 g of sodium per 100 g, about 7 mg per 100 mg serving. Check iodine and arsenic for the lot before you fix the serving size.
That depends on your market, not on the ingredient. The producer's file reports unpublished cell, animal and small human pilot studies, but we hold no approved claim for this extract and do not make one. Wording on immune, skin and digestive function is regulated differently in the USA, the Gulf, Australia and the CIS; set it with your regulatory adviser.
