supplement

Vitamin D3 + K2

The essential daily pairing for robust immune defense and optimal bone health.

€26,90 EUR

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Quantity

Free shipping from 39€
Delivery 48–72 h · Iberian Peninsula
Easy returns within 30 days

Targeted benefits

What does it help with

Bones & Muscles
Contributes to the maintenance of normal bones and normal muscle function.
Immune System
Contributes to the normal function of the immune system.
Calcium Absorption
Contributes to normal absorption and utilization of calcium and phosphorus.

Science-backed formula

Skeletal bone strength and circulatory safety.

Vitamins D3 and K2 are a fat-soluble team that works together to manage calcium correctly. Welleo delivers a high-potency formula providing 100 µg (4,000 IU) of Vitamin D3 and 90 µg of Vitamin K2 (as MK-7), pre-dissolved in premium Extra Virgin Olive Oil. While Vitamin D3 helps your body absorb calcium into your bloodstream¹, Vitamin K2 acts like a traffic controller, activating the specific proteins that lock that calcium into your bones and teeth, preventing it from gathering in your arteries or soft tissues².

Key ingredients

Meet the ingredients

Vitamin D3
100 µg / 4,000 IU (2,000% NRV)
Supports normal bone and teeth maintenance, immune function, and calcium absorption

Source

Lanolin (sheep wool) in extra-virgin olive oil

Form

Cholecalciferol
Vitamin K2
90 µg (120% NRV)
Contributes to normal blood clotting and maintenance of normal bones

Source

Bacterial fermentation (Bacillus subtilis natto)

Form

Menaquinone-7 (MK-7)
Extra-virgin olive oil
Carrier oil for fat-soluble vitamins D3 and K2

Source

Olive fruit (Olea europaea)

Form

Extra-virgin olive oil

Nutrient	Per serving	% NRV
Vitamin D	100 µg (4,000 IU)	2,000%
Vitamin K	90 µg	120%

NRV = Nutrient Reference Value.

How to Take It

Daily Dose
Take 1 softgel daily (delivering 4,000 IU of Vitamin D3 [2,000% VRN] and 90 µg of Vitamin K2 [120% VRN] for optimal systemic balance).
Ideal Timing
Take it in the morning alongside breakfast. Because the vitamins are already pre-dissolved in olive oil, absorption is highly efficient regardless of meal size.
Crucial Pairings
Always consume with water. Avoid taking high doses of Vitamin E at the exact same time, as it can compete for the same fat-soluble absorption pathways.
Routine Consistency
Be consistent. Building stable vitamin D levels and activating calcium-binding proteins in your tissues takes between 8–12 weeks of daily use.

Formula quality

Why choose this supplement?

Bone-Vascular Teamwork
Calibrated ratio ensures calcium doesn't float around freely but goes directly where it belongs—your skeleton².
Extra Virgin Olive Oil Base
Pre-dissolved in natural fats to ensure your body can absorb these fat-soluble vitamins efficiently right away.
Clean Formulation
Encapsulated in a clear, pure softgel shell with zero artificial colors, synthetic dyes, or titanium dioxide.

Transparency

Questions before you start

Why must Vitamin D3 always be paired with Vitamin K2?

Taking high doses of Vitamin D3 alone boosts your calcium absorption, which increases the overall calcium presence in your blood. If your body lacks enough Vitamin K2, this calcium cannot be efficiently guided into your bones. Vitamin K2 acts as the biological guide, turning on the proteins that capture calcium from circulation and secure it into the skeleton, ensuring vascular safety².

What does the MK-7 designation mean for Vitamin K2?

Menaquinone-7 (MK-7) is an advanced, long-acting form of Vitamin K2. Unlike standard Vitamin K1 which leaves your system within hours, MK-7 remains active in your bloodstream for over 48 hours. This extended timeline ensures a steady, constant supply to your bones and blood vessel walls, where it does its best work.

Are there any safety limits or contraindications?

Yes. More information means smarter decisions. Because Vitamin K2 naturally participates in your body’s coagulation systems, individuals taking prescription anticoagulant medications (like Warfarin or Sintrom) must not consume this supplement without strict medical clearance. Do not exceed the recommended daily dose.

Scientific evidence

Studies & Evidence

3 studies cited

1. Influence of fatty acid chain length and micelle formation on the delivery and bioavailability of Vitamin D3.
Mulrooney, S., et al.
View on PubMed ↗
2021
2. Vitamin D and Vitamin K: Synergistic Roles and Emerging Evidence for Combined Supplementation.
Vera, M., et al.
View on PubMed ↗
2025
3. Synergistic effect of low K and D vitamin status on arterial stiffness in a general population.
Mayer, O., Jr., et al.
View on PubMed ↗
2017

Pairs with test

Pairs perfectly with a test

Your supplement works best when matched to your actual levels. Tests are available at pharmacies and healthcare providers — get a baseline, then use data to guide your plan.

Baseline first
Measure your current levels at a pharmacy or your doctor before supplementing.
Smarter dosing
Align intake with real markers, not guesswork.
Track progress
Retest to confirm your protocol is working.

Coming soon · The Welleo App connects your test results, supplement plan, and follow-up in one place.