Vitamin D3 (cholecalciferol) supports intestinal calcium absorption, essential for strong bones — but without vitamin K2, that calcium risks depositing in soft tissue rather than bone. Vitamin K2 as MK-7 activates the proteins responsible for directing calcium onto the bone matrix, while helping avoid unwanted calcium deposits elsewhere. Delivering the vitamins in MCT coconut oil — rapidly absorbed without complex bile digestion — gives markedly better bioavailability than dry tablets for these fat-soluble nutrients.

Vitamin D contributes to normal immune function — particularly relevant in Paris, where sunlight is insufficient for adequate skin synthesis from October to April; national studies suggest nearly 80% of the French population has insufficient vitamin D status. Vitamin D also contributes to normal bone maintenance and normal calcium/phosphorus absorption, while K2 (menaquinone-7, the most studied and active K2 form, in its all-trans configuration) contributes to normal bone maintenance by activating osteocalcin. Vitamin D also contributes to normal muscle function.

Take the recommended daily dose once a day, ideally with a fat-containing meal (olive oil, butter, avocado) to further support absorption of the fat-soluble D3 and K2. Supplementation is particularly recommended from October to April, for people working indoors with little sun exposure, older adults, and those with darker skin, who synthesise less vitamin D for the same sun exposure.

German-manufactured to pharmaceutical-grade standards, with traceable raw materials and a precise 2,000 IU dose per serving.

Do not exceed the recommended daily dose. This food supplement is not a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of young children’s reach. People on anticoagulant medication (vitamin K antagonists) must consult a healthcare professional before taking vitamin K2.

Why supplement with vitamin D3 in Paris?

Paris sits at a latitude (48°N) where sunlight is insufficient from October to April for adequate skin vitamin D synthesis. National studies show nearly 80% of the French population has insufficient vitamin D status — a daily 2,000 IU dose is commonly recommended by nutrition experts.

MK-7 vs. MK-4 — what’s the difference?

MK-7 has a much longer half-life in the body than MK-4 (about 72 hours vs. 1–2 hours), so a single daily dose maintains constant active K2 levels. The all-trans form used here guarantees maximum biological activity.

Can people on blood thinners take vitamin K2?

Vitamin K2 interacts with vitamin K antagonist (VKA) anticoagulants. Anyone on this type of treatment must consult their doctor before supplementing with vitamin K2; direct oral anticoagulants (DOACs) don’t carry this specific interaction, but medical advice remains essential.

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.