Best Vitamin D3 & K2 Supplements

At Levitas Retail, we proudly offer the best vitamin D3 and K2 supplements in London — clinically backed, doctor-recommended, and selected for optimal bioavailability. We believe that the science behind Vitamin D3 and K2 synergy is powerful: Vitamin D helps the body absorb calcium, while Vitamin K2 ensures that calcium is properly directed to bones and away from arteries, supporting cardiovascular health and bone density.

We stock several premium brands, including HINNAO Vitamin D3 + K2, which offers superior nanoliposomal absorption for maximum impact. This is why Levitas loves the science behind HINNAO: it uses patented technology that allows fast, reliable delivery of Vitamin D3 and K2 — a formula we use across our clinical services and in our retail line because it works.

Looking for Vitamin D3 supplement London? You can now conveniently buy Vitamin D3 supplements online in London through our secure platform.

1 10

Why Is Vitamin D So Important?

Vitamin D is not just a "vitamin" — it acts more like a hormone and affects over 1,000 biological processes in the body. Key reasons to optimise Vitamin D levels:

✅ Immune System Support Vitamin D modulates immune responses, helping fight infections and reduce inflammation.

✅ Bone Health Essential for calcium absorption — reduces the risk of osteoporosis, fractures, and bone pain.

✅ Mood & Mental Wellbeing Low Vitamin D is linked with low mood, seasonal affective disorder (SAD), and fatigue.

✅ Cardiovascular Health Supports vascular function and helps regulate blood pressure.

✅ Hormonal Balance Vitamin D influences thyroid function, sex hormones, and adrenal hormones.

How to Use Vitamin D3

  • For Oral Supplements

    Take Vitamin D3 with food containing healthy fats to improve absorption. Consistency is key: take it daily or as prescribed.

  • For Vitamin D3 with K2

    We recommend the HINNAO D3 + K2 formula sublingually (under the tongue) or orally, depending on product instructions.

  • Vitamin D Injections — Now Available at Levitas Clinics

    For those needing rapid correction (for deficiency, immune support, or therapeutic reasons), Levitas offers Vitamin D3 injections — an advanced service for optimising levels quickly. Ask us about our in-clinic Vitamin D programs.
Buy Vitamin D3 Supplements Online London

Benefits of Vitamins for Health

A well-rounded vitamin routine can provide:

  • Enhanced Immunity
  • More Energy & Vitality
  • Better Bone Density
  • Heart Health Support
  • Healthier Skin, Hair & Nails
  • Improved Mood & Sleep Quality

Side Effects of Vitamin D3 and K2

When taken at recommended doses, Vitamin D3 + K2 is very safe.

Possible side effects (rare) at very high doses:

  • Nausea
  • Headaches
  • Loss of appetite
  • Muscle pain

These are typically linked to over-supplementation or excess calcium intake combined with high D3 doses without monitoring.

  • Precautions

    • Always check Vitamin D blood levels periodically when supplementing long-term.
    • Consult a practitioner if pregnant, breastfeeding, or taking anticoagulants (K2 can interact with blood thinners).
    • Doses above 10,000 IU per day should be medically supervised.

  • Overdose

    Vitamin D toxicity is rare but can occur with excessive supplementation over time. Symptoms may include:

    • Hypercalcemia (too much calcium in blood)
    • Nausea, vomiting
    • Kidney problems

    Prevention: Stick to recommended dosing or medically guided protocols. Levitas practitioners monitor all patients on high-dose regimens.

Why Shop Vitamin D at Levitas?

  • Doctor-curated supplements
  • Used in clinical practice
  • HINNAO D3 + K2 — exclusive formula
  • Fast UK delivery
  • Professional support

Frequently Asked Questions (FAQs)

What is the best vitamin D3 and K2 supplement in London?

Levitas recommends HINNAO D3 + K2 for its exceptional absorption, purity, and scientific backing.

Why take D3 with K2?

K2 ensures that calcium absorbed by Vitamin D3 is directed to bones, not soft tissues — protecting arteries and improving bone health.

How can I buy Vitamin D3 supplements online in London?

Simply visit Levitas Retail Vitamins and order securely with fast delivery.

What is the difference between D2 and D3?

Vitamin D3 (cholecalciferol) is the natural, active form preferred for human supplementation — it's more effective than D2.

How much Vitamin D3 should I take daily?

It depends on your blood levels. Common maintenance: 2,000–4,000 IU daily. Therapeutic or deficiency correction may require more — speak to a practitioner.

Is Vitamin D safe during pregnancy?

Yes — in fact, it's vital. However, dose should be guided by your healthcare provider.

How fast do Vitamin D injections work?

Injections rapidly raise Vitamin D levels — many people feel the benefits (energy, mood, immunity) within days to weeks.

Are there side effects to taking K2?

Vitamin K2 is very safe at standard supplement levels. Caution is needed if taking anticoagulant medications — consult your doctor.

Do I need blood tests before taking Vitamin D3?

It's ideal to check Vitamin D levels before starting high doses or injections. Levitas offers comprehensive testing services.

Why does Levitas prefer HINNAO Vitamin D3 + K2?

Because of the cutting-edge science behind it — nanoliposomal delivery ensures superior absorption and cellular impact, which aligns with our regenerative medicine philosophy.