Lithothamne slowly accumulates the calcium and magnesium found in seawater as it grows, fixing them into its structure as natural carbonates. This biomineralisation gives it an exceptional calcium content alongside a complex mineral matrix with trace marine elements (iron, manganese, zinc, selenium, iodine). Vecteur Sante, a French specialist in naturally-sourced supplements, offers this powder in a 100% pure form, simply purified and micronised for optimal assimilation. Per 3g dose (one measuring spoon): calcium 960mg (120% of Nutrient Reference Values) and magnesium 78mg (21% NRV), plus trace marine elements including iron, manganese, zinc, copper, selenium and iodine. A 250g tub provides between 80 and 250 doses depending on the dosage used.

Calcium is the most abundant mineral in the human body: 99% is found in bones and teeth. Maintaining a sufficient intake throughout life is essential for strong bones, particularly during growth, pregnancy, breastfeeding and after menopause. Recommended intake in France is 800 to 1000mg a day for an adult. Lithothamne’s calcium, accompanied by magnesium and trace elements in a natural matrix, has recognised bioavailability. In line with EFSA-authorised claims, calcium contributes to the maintenance of normal bones and teeth, to normal blood clotting, to normal energy metabolism, and to the normal function of digestive enzymes.

Modern diets, rich in animal protein, refined grains and processed food, generate a significant acid load. To keep blood pH within its optimal range, the body draws on its alkaline reserves, including bone calcium. Rich in calcium and magnesium carbonates, Lithothamne acts as a natural alkalising buffer that helps neutralise this excess acidity — a valuable ally for anyone whose diet tends to be acidifying, or who wants to restore a better acid-base balance. The powder format allows for gradual dosing: one dose after meals is often enough to ease acidity-related discomfort. Lithothamne is also traditionally used for digestive comfort, its calcium carbonates helping to neutralise excess gastric acidity.

The measuring spoon provided measures approximately 1g of powder. Dissolve in a liquid or food: water, juice, soup, compote, yoghurt or smoothie. Dosage varies by use: acid-base balance, 1 to 3 doses a day away from meals; gastric comfort, 1 dose after meals if needed; bone support and remineralisation, 2 to 3 doses a day with meals, ideally combined with vitamin D to optimise calcium absorption. A 2-3 month course is generally recommended, renewable after a one-month break. Store in a cool, dry place away from light.

Food supplement. Not a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of children. If digestive discomfort persists, consult a healthcare professional.

How much calcium is in one dose of powder?

One 3g measuring spoon provides 960mg of calcium, i.e. 120% of the daily Nutrient Reference Values, and 78mg of magnesium (21% NRV).

Can Lithothamne be combined with vitamin D?

Yes, this combination is even recommended: vitamin D contributes to the intestinal absorption of calcium and to its use by the body. This pairing is particularly useful in autumn and winter, when skin synthesis of vitamin D is reduced.

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.