Ascophyllum nodosum is a brown seaweed from cold northern seas, harvested in the wild waters around Scotland’s Hebrides islands. This isolated marine environment, far from industrial activity, offers ideal conditions for growing a pure seaweed dense in essential minerals. Ascophyllum nodosum is one of the most iodine-rich seaweed species, making it the reference raw material for plant-based iodine supplements.

Harvesting follows a certified organic, sustainable protocol that limits collection to allow the marine habitat to naturally renew. The seaweed is then processed without harsh heat treatment, preserving the integrity of the plant-based iodine and other naturally occurring minerals (iron, calcium, magnesium). Traceability is complete, from the Scottish harvest site to final packaging, with batch-by-batch analysis including DNA testing to confirm the absence of contamination from other allergenic marine organisms.

Iodine is an essential trace element whose best-documented role concerns thyroid gland function. EFSA has authorised several health claims for iodine: it contributes to normal thyroid function, to normal energy-yielding metabolism, to normal function of the nervous system, to the maintenance of normal skin, and to normal production of thyroid hormones. These claims apply directly to Dynveo’s kelp iodine, which provides 100% of the NRV per capsule.

The thyroid uses iodine to synthesise the thyroid hormones T3 and T4, which regulate many metabolic functions: energy production, body temperature regulation, cell growth and nervous system function. Iodine deficiency can slow thyroid activity, showing up as persistent fatigue, weight gain, slower cognition and fragile skin. In France, iodine deficiency remains relatively common, particularly among people who eat little or no fish, eggs or dairy.

The bio-organic iodine extracted from kelp has a better affinity with the human body than synthetic potassium iodide, with superior digestive tolerance, and benefits from the synergistic action of the other minerals and vitamins naturally present in the seaweed.

Take 1 capsule per day with a glass of water, ideally with a meal. This single dose provides the full daily iodine requirement recommended by European health authorities (150 µg/day for an adult). A 180-capsule bottle covers six months of supplementation. A minimum three-month course is recommended to durably support thyroid function and energy metabolism. Kelp iodine pairs well with other supplements for overall vitality support: vitamin D, magnesium, omega-3 or adaptogens like rhodiola.

Intended for adults. Do not exceed the recommended daily dose: excessive iodine intake can be counterproductive for the thyroid. In cases of thyroid disease (hyperthyroidism, Hashimoto’s thyroiditis, thyroid nodules), iodine supplementation must be discussed with an endocrinologist beforehand. Pregnant or breastfeeding women should consult their doctor, as iodine needs increase during pregnancy (200 µg/day) but supplementation should be tailored individually.

Why choose kelp iodine over synthetic iodine (potassium iodide)?

Organic iodine extracted from kelp has a better natural affinity with the body and generally superior digestive tolerance. It also benefits from the synergistic action of other naturally occurring minerals and trace elements in the seaweed (iron, calcium, magnesium, B vitamins). Synthetic potassium iodide is an isolated form, without this natural nutritional context.

Is this organic kelp suitable for people with a seafood allergy?

Seafood allergies generally involve specific proteins from crustaceans and molluscs, distinct from kelp’s components. As a precaution, every batch of Dynveo kelp undergoes DNA testing to verify the absence of contamination from allergenic marine organisms. If you have a known severe allergy to marine products, medical advice is recommended before use.

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.