Fucoidan is a sulphated polysaccharide naturally found in the cell wall of certain brown seaweeds, including Fucus vesiculosus, Laminaria japonica (kombu), Undaria pinnatifida (wakame) and Cladosiphon okamuranus (mozuku), which produce it as a defence against UV radiation, dehydration at low tide, and pathogens.

The fucoidan extracted from Fucus vesiculosus is considered among the richest in fucose, the active sugar behind fucoidan’s biological properties; this common brown seaweed of the North Atlantic coast is easily recognised by the small air-filled vesicles that let it float. Dynveo’s Maritech extract comes from seaweed hand-harvested in the cold, clean waters of the Canadian Atlantic coast, an area known for exceptional marine resources.

Okinawa is a Japanese archipelago whose residents hold one of the world’s records for longevity, with proportionally more centenarians than almost anywhere else and remarkable health in old age that has fascinated researchers for decades. The traditional Okinawan diet features a high intake of seaweed, sweet potato, tofu, green vegetables and fish, with brown seaweed rich in fucoidan playing a central role.

Researchers have identified fucoidan as one of the active components that may contribute to this population’s remarkable longevity, alongside factors like moderate calorie restriction, daily physical activity and strong social ties — Dynveo’s fucoidan offers this active in a concentrated, standardised form, without needing to eat large amounts of seaweed daily.

Take 2 capsules a day, with a meal and a large glass of water; a 60-capsule bottle covers a one-month course at the recommended dose. A course of 2-3 months is recommended, repeatable after a break of a few weeks; for a full 3-month course, plan on 3 bottles. Regular use is essential to let fucoidan build up in the body, and taking it with a meal supports absorption and limits potential digestive discomfort, particularly for people sensitive to seaweed.

Fucoidan may potentiate the effect of anticoagulants (blood thinners). Not recommended for people on anticoagulant treatment without prior medical advice. Not recommended for pregnant or breastfeeding women without medical consultation. If you have a known seaweed allergy or a thyroid condition, consult your doctor before use. For adult use only. Do not exceed the recommended daily dose. A food supplement is not a substitute for a varied, balanced diet and a healthy lifestyle. Store in a cool, dry place, away from light. Keep out of reach of children.

Is fucoidan a medicine?

No, fucoidan is a food supplement based on seaweed extract. It is not a substitute for medical treatment and should not be used as one; scientific research on fucoidan is promising but still ongoing. If you are on medical treatment, consult your healthcare professional before starting fucoidan supplementation.

Does Dynveo’s fucoidan contain iodine?

Fucus vesiculosus naturally contains iodine, but the Maritech extraction process specifically concentrates fucoidan and reduces iodine content compared with eating whole seaweed; every batch is tested for iodine levels. If you have a thyroid condition or follow a low-iodine diet, consult your doctor before use.

Can fucoidan be combined with other Dynveo supplements?

Yes, fucoidan fits well into a broader supplementation programme — it’s often paired with antioxidants like astaxanthin or resveratrol, collagen supplements, or vitamin and mineral complexes. Our team at Herba Barona in Paris 12 can help put together a personalised programme for your goals.

Herba Barona is an independent specialist supplement shop in the heart of Paris — established in 2006. What you order is genuinely on our shelves: we ship from our own stock, with no dropshipping and no long waits.

Visit us at 10 rue Théophile Roussel, Paris 12 — or use Click & Collect and pick up your order in-store. We also deliver across France and Europe. Friendly, expert advice in English from our team.

Where is the shop?

Herba Barona is at 10 rue Théophile Roussel, 75012 Paris — a two-minute walk from Ledru-Rollin (line 8), close to Bastille. Open Tuesday to Saturday, 9:30 am–6:30 pm.

Can I order online or collect in store?

Yes. We ship across France and Europe under the same conditions as our French store, or choose Click & Collect to pick up your order for free at our Paris shop.