フコイダン

Industry-typical MOQ for purified fucoidan concentrate is in the 1–10 kg range per lot, with 6–12 week lead times because most producers run scheduled extraction campaigns rather than continuous production. The mozuku raw material itself is harvested seasonally (April–June for Okinawa Cladosiphon okamuranus), so suppliers buffer with frozen or dried intermediate stock. For larger volumes (50 kg+) or for custom molecular-weight specifications, expect longer lead times and request a manufacturing schedule confirmation in writing.

A standard fucoidan supplier package includes: (1) per-lot CoA with fucose %, total sulfate %, molecular weight (or MW distribution), uronic acid %, residual protein, residual ash, and heavy metals (notably arsenic — relevant for seaweed-derived ingredients), (2) microbiological certificate (total plate count, yeast/mould, coliform, E. coli, Salmonella), (3) source-species declaration with binomial name (e.g., Cladosiphon okamuranus, Saccharina japonica) and harvesting region, (4) allergen statement, and (5) extraction-process description sufficient to demonstrate solvent residues are within applicable limits. For EU shipments, a non-Novel-Food self-declaration or reference to an authorised Novel Food entry should be supplied where applicable.

Availability is supplier-specific. Marinova's Maritech fucoidans (Australian, not Japanese) hold non-GMO and EU/USDA NOP organic certifications and are widely cited as the only certified-organic fucoidan in the world. For Japanese mozuku-derived fucoidan, organic certification of the seaweed source is unusual because most mozuku is wild-harvested or cultivated under Okinawan aquaculture practices that have not been brought into a formal organic scheme. Kosher and halal certification can usually be arranged for the extraction step but should be confirmed in the RFQ rather than assumed.

Three factors dominate the per-kilo pricing: (1) source species — Cladosiphon okamuranus (Okinawa mozuku) is comparatively easier to source than deep-water kombu, while Mekabu/Undaria fucoidan tends to attract premium pricing due to lower yield, (2) purity and standardisation — a 'crude' fucoidan-rich seaweed extract may run a fraction of the price of a >85% purity fucoidan with a specified molecular-weight window, and (3) certifications — GRAS / Novel Food / organic status materially shifts pricing. Annual mozuku harvest variability (heat-stress events such as the 2015 dip) can also tighten supply and move pricing for material sourced from Okinawa.

Beyond standard food-ingredient supply terms, buyers should consider: (a) species-and-region lock-in clauses (so the supplier cannot silently substitute a different brown-seaweed source between lots), (b) molecular-weight and sulfate-content tolerance ranges as part of the spec — out-of-tolerance lots should be a recognised rejection ground, (c) reservation of seasonal harvest capacity if you need larger volumes (April–June mozuku window), and (d) for EU-bound material, written confirmation of which Novel Food entry the product relies upon (or a basis for non-Novel-Food status). Indemnification on regulatory misclassification is worth negotiating explicitly given the structural variability of fucoidan as a category.