Liquid Vitamin D
Liquid Vitamin D
Liquid Vitamin D
Liquid Vitamin D
Liquid Vitamin D

Liquid Vitamin D

€21,95
Immunity
Immunity

Supports everyday immune function

Heart health
Heart health

Supports cardiovascular function

Evidence-based
Evidence-based

Grounded in modern research

Quality
Quality

Exceptional quality standards
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Frequently bought together
Recommended dosage

Take 2 applications daily after breakfast.

The package contains 250 servings (50 ml).

Ingredients list

Liquid Vitamin D

Made in the EU

All our supplements are manufactured in the European Union, where they meet the strictest standards and regularly undergo rigorous quality control.

We do all of this so that you can always rely on your supplements one hundred percent.

Complex Vitamin D3 + K2 MK-7 is a D3 + K2 stack built for athletes and high-performers who want consistent recovery, resilience, and performance year-round.

Vitamin D3 supports far more than immunity - it helps maintain normal muscle function, supports recovery under stress, and plays a role in overall hormonal balance. Despite its proven benefits, vitamin D deficiency remains common because modern life keeps us indoors and UVB levels are too low for meaningful production for months at a time. And if you supplement D3 without K2 (MK-7), the job isn’t fully finished: D3 helps your body absorb calcium, while K2 helps direct it where it belongs, into bones and teeth, instead of letting it drift into soft tissues. 

The result is simple: stronger foundations, better day-to-day readiness, and a smarter way to cover the October–April gap when your body can’t reliably make enough vitamin D on its own.

7 500+ Reviews

7 500+ reviews with 4,9/5 average.

100 000+ Customers

100 000+ happy customers.

Fast Shipping

We ship 95% of orders the same business day.

99,6% Satisfaction

99,6% of customers would recommend us.

FAQs

Delivery and Payment

Orders within the EU and Switzerland are usually delivered in 1–3 business days.

How much does shipping cost?

  • Pickup point (GLS) – €4,49
  • Home delivery (GLS) – €6,59

For all orders over €70, shipping is completely free!

You can pay for your order using the following payment methods:

  • Credit or debit card
  • PayPal
  • Apple Pay, Google Pay, or Shop Pay
  • Bank transfer / QR code
  • 3 interest-free installments via Klarna
When should I take Vitamin D3+K2 MK-7?

After a meal, ideally after breakfast or lunch.

The presence of fats in the meal significantly increases the absorption of vitamin D from your diet.

How can I tell if I have a vitamin D deficiency?

Go for a blood test.

A blood test is the only way to tell whether your vitamin D level in the blood is optimal.

Is vitamin D safe for children as well?

Yes.

However, the exact dosage should always be consulted with a pediatrician.

Can I take too much vitamin D?

Yes.

That’s why you should always follow the recommended dosage, and consult your doctor before taking higher doses.

I have blood test results, how much vitamin D should I supplement?

Breakdown of ideal supplementation based on blood vitamin D levels:

<20 ng/ml (<50 nmol/l) -> 4,000 to 8,000 IU/day -> 4 to 8 weeks, then re-test

20 to 29 ng/ml (50 to 72.5 nmol/l) -> 2,000 to 4,000 IU/day -> 4 to 8 weeks, then re-test

30 to 50 ng/ml (75 to 125 nmol/l) -> less than 2,000 IU/day -> 4 to 8 weeks, then re-test

50 ng/ml (>125 nmol/l) -> Consume foods rich in vitamin D

However, always consult your doctor about the exact dose.

*Current level -> Recommended supplementation

Couldn't find an answer to your question?

In that case, please visit our general FAQs.

Alternatively, contact us at info@officialcomplex.com. We will handle your question or request within 24 hours.

Disclaimer

This product has been placed on the market as a dietary supplement. It is not a medicine or a substitute for a varied diet. The minimum shelf life is stated on the packaging. The purpose of the information provided here is not to increase the consumption or sales of products. We do not encourage inappropriate, excessive, or unjustified use of the product. Always consult a doctor regarding the active ingredients and the use of the product. Store in a dry, cool place, out of reach of children.
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