Is it safe to take vitamin K2 supplements?

Yes—vitamin K2 is considered safe and well-tolerated in healthy individuals. Any excess is usually eliminated by the body. Just make sure to stick to the recommended daily dose.

Which is better: vitamin K2 capsules or drops?

Both are great—capsules are super convenient, while drops offer flexible dosing. Go with whatever fits best into your lifestyle.

Which BIOGENA vitamin K product is best?

It depends on your needs. Whether you’re looking for K2 capsules, a D3-K2 combo, or drops—we’ve got science-based, high-quality options. Not sure which one is right for you? We’re happy to help you decide.

Where is vitamin K found?

Vitamin K1 is found in leafy greens like spinach, broccoli, and kale. Vitamin K2 comes from fermented foods (like sauerkraut and cheese) and animal products in smaller amounts.

How much vitamin K do I need daily?

The official recommendations are 65 µg/day for women and 80 µg/day for men—primarily to support blood clotting. Some studies suggest higher levels may benefit bone health.

When should I take vitamin K2?

With a meal that contains fat! Since vitamin K2 is fat-soluble, it’s best absorbed alongside dietary fats.

How often should I take vitamin K2?

Usually once a day, depending on the product and dosage. Always check the label or ask your healthcare provider for guidance.

Who should consider taking vitamin K2?

Anyone looking to support bone health and vascular flexibility—especially if you don’t eat a lot of green vegetables or if you’re already supplementing with vitamin D3.

What does vitamin K do?

Vitamin K contributes to normal blood clotting and plays a role in maintaining healthy bones. K2 helps ensure calcium is properly used—supporting strong bones and smooth arteries.

Can you overdose on vitamin K?

In healthy people, overdosing through food or common supplements is extremely rare. Excess vitamin K is typically broken down and eliminated by the body.

Where can I get vitamin K?

Through food—especially green vegetables (K1) and fermented products like cheese or sauerkraut (K2). And when you need more: you’ll find premium-quality capsules, drops, and combos right here at BIOGENA.

How fast does vitamin K work?

It depends on the form. K1 acts quickly but short-term. K2—especially MK-7—stays active in the body for up to 72 hours, making it ideal for consistent support.

When should you avoid taking vitamin K2?

If you're taking blood thinners like warfarin (Marcumar), talk to your doctor first—vitamin K2 can influence how these medications work.

What’s the difference between vitamin K and K2?

"Vitamin K" is the umbrella term for K1 and K2. K1 comes mainly from leafy greens and supports blood clotting. K2 is more active in bone metabolism and vascular health—and stays in your system longer.

How important is vitamin K2?

Vitamin K2 is essential for strong bones and elastic arteries. It helps transport calcium to the right places—into bones, not blood vessels. Especially in combination with vitamin D3, it’s a smart choice for long-term health.

Why take vitamin K with vitamin D?

Because they work best together: Vitamin D helps absorb calcium, and K2 helps direct it where it’s needed. Without K2, calcium may end up in places it shouldn’t—like your arteries. For healthy bones and flexible vessels, this duo is a must.

Show all Show all

Vitamin K2 supplements

Vitamin K isn’t called the “bone vitamin” for nothing—but its benefits go far beyond that. If you're looking to support your vitamin K levels in a targeted way, we offer carefully formulated options—available as convenient capsules or easy-to-dose drops.

6 results

Filters & sorting

Biogena Essentials
Vitamin K2 100
With the active, well-absorbable vitamin K compound all-trans menaquinone-7
€40.90
Biogena Essentials
Vitamin D3 & K2 1.000 I.U.
Premium Vitamin D3 K2 capsules for the maintenance of normal bones
€50.90
Biogena Essentials
Vitamin D3 & K2 drops
High-Dose Vitamin D3 & K2 Drops – perfectly balanced in a smart 2:1 blend
€23.90
Biogena Sports
D3 & K2 liquid
Vitamin D3 & K2 liquid: Your daily support - for bones, muscles and immune system
€25.90
Bestseller
Biogena Exceptionals
Osteo Calbon Complex® Gold
Premium bone and joint complex with calcium, vitamin D & more
€39.90
Biogena Essentials
Marie IMMUN®
Vitamin D with the added benefit of vitamin K2 and magnesium
€63.90

Vitamin K supplements – A multitasker for bones, vessels & more

Vitamin K is a true all-rounder. Best known for its role in supporting normal blood clotting, it also plays a central part in maintaining strong bones and flexible blood vessels.

What is vitamin K? A powerhouse duo.

Vitamin K comes in two main forms:

Vitamin K1 (phylloquinone) – found mostly in leafy green vegetables
Vitamin K2 (menaquinone) – found in fermented foods and animal products, and also produced by your gut microbiome

Both work quietly behind the scenes to support the production of proteins that contribute to blood clotting, bone stability, and vessel elasticity.

Vitamin K in food. Think green (and fermented)

Some of the richest sources of vitamin K include spinach, broccoli, and kale. Vitamin K2 shows up in fermented foods like sauerkraut and aged cheese. Tip: since vitamin K is fat-soluble and sensitive to light, store vitamin K-rich foods in a dark place for best quality.

The role of Vitamin K2: Strong bones. Flexible arteries.

One standout benefit of vitamin K2? It activates Matrix GLA Protein (MGP)—a key player that binds excess calcium in the bloodstream. Why is that important? It helps direct calcium to your bones (where it belongs), and keeps it away from your arteries (where it doesn’t). Studies like the Rotterdam Study suggest that higher vitamin K2 levels may positively impact vascular flexibility.

When food isn’t enough – time for smart K2 vitamin supplementation

A lack of green veggies or an imbalanced gut microbiome can make it tricky to get enough vitamin K. That’s where high-quality supplements step in. Popular choices include vitamin K2 capsules or drops—easy to dose and perfect for everyday use. Looking for higher-potency options? We’ve got you covered, in proven BIOGENA quality.

Vitamin K2 100

€40.90

Product tip: Vitamin K2 100

Vitamin K2 100

€40.90

Product tip: Vitamin K2 100

Vitamin K2 and D3 – A true dream team

Vitamin K2 and vitamin D3 work best together. Vitamin D helps your body absorb calcium; vitamin K2 ensures that calcium goes straight to your bones. Without this balance, calcium can end up in soft tissues like arteries instead. That’s why a combined supplement with D3 and K2 is a smart choice for holistic support.

Vitamin D3 & K2 1.000 I.U.

€50.90

Product tip: Vitamin D3 & K2

Vitamin D3 & K2 1.000 I.U.

€50.90

Product tip: Vitamin D3 & K2

How to take vitamin K2? It’s all in the dosage

According to German nutritional guidelines, the minimum recommended intake is 65 µg/day for women and 80 µg/day for men—enough to cover blood clotting, but many experts believe higher intakes are beneficial for bone health. So if you’re supplementing, be sure to check the actual amount in your product.

Applications of vitamin K – More than meets the eye

Whether it’s supporting bone metabolism, normal blood clotting, or vascular elasticity, vitamin K is far more versatile than once thought. Especially the MK-7 form of vitamin K2—known for staying active in the body for up to 72 hours—offers long-lasting support.

Buy vitamin K – for a strong, balanced lifestyle

Maintaining healthy vitamin K levels isn’t just about bones and blood—it’s also about keeping your body moving with ease. And the best part? Overdosing is unlikely, as excess vitamin K is typically excreted naturally.

Order your vitamin K2 now, boost your well-being, and count on us for trusted, high-quality supplements developed with science and care.

FAQs

Got questions about vitamin K? Here’s what you need to know.

Sign up for our newsletter and get a €10 voucher

Sign up for our newsletter, receive your personal €10 voucher and look forward to exciting insights into the latest product innovations, giveaways and health tips – so you'll be well accompanied on your journey to well-being.