Supplements
/
Vitamins
/
Vitamin D + K2 Liquid
Excellent 4.6 out of 5
Vitamins

Vitamin D + K2 Liquid

A convenient liquid supplement combining Vitamin D and K2 to support strong bones and a healthy immune system by improving calcium absorption. It may also support cardiovascular health by helping direct calcium to bone rather than soft tissues.

Learn more about Vitamin D + K2 Liquid
Cancel anytime
HSA/FSA eligible
Results in a week
Physician reviewed

Every result is checked

·
CLIA-certified labs

Federal standard for testing

·
HIPAA compliant

Your data is 100% secure

Key Facts

  • A liquid combination of vitamins D3 and K2 that work together to optimize how your body uses calcium
  • Supports bone density, cardiovascular health, and immune function through calcium regulation
  • Addresses the gap left by vitamin D alone: D3 helps you absorb calcium, while K2 directs it to bones instead of soft tissues and arteries
  • Liquid form enhances absorption compared to many tablet alternatives

Ingredients

Vitamin D3 (25 mcg / 1,000 IU), vitamin K2 as menatetrenone / MK-4 (200 mcg), medium chain triglycerides, mixed tocopherols.

Why We Chose This

Most people have suboptimal vitamin D levels, but taking D3 alone tells only half the story. Without K2, the calcium your body absorbs can deposit in arteries and soft tissues rather than bones — the opposite of what you want. This formulation pairs D3 with K2 in a research-backed ratio, delivered in liquid form for better bioavailability. The combination addresses a real physiological need: calcium trafficking. Clean ingredients and no unnecessary additives make this a straightforward way to support bone strength and cardiovascular health without the guesswork.

Other Vitamins

See more supplements

Frequently Asked Questions About Vitamin D + K2 Liquid

What is the supporting research for the benefits of vitamin D + K2 liquid?
  • Vitamin D promotes calcium absorption, while vitamin K appears to direct calcium to bone. (mechanistic review)
  • Combined D and K supplementation is associated with greater bone mineral density improvements. (clinical data review)
  • D3 and K2 supplementation is associated with significantly improved lumbar spine density. (randomized trial)
How do I take vitamin D + K2 liquid?

Take 2 drops one to three times daily, inverting the bottle to dispense individual drops.

You can add drops directly to food or mix into beverages, ideally with a meal for optimal absorption. Do not refrigerate.

Can I take vitamin D + K2 liquid with other supplements or medications?

Vitamin D + K2 liquid is generally safe to take with other supplements and medications at recommended dosages, though certain medications like statins, thiazides, warfarin, and antibiotics may interact with these vitamins. Consult your healthcare provider before combining this supplement with any medications or other supplements to ensure compatibility.

Who might benefit from taking vitamin D + K2 liquid?

Anyone with sub-optimal vitamin D levels—which includes most people—benefits from this combination for stronger bones and cardiovascular protection. Those concerned about calcium distribution and arterial health particularly gain from vitamin K2's role in directing calcium where it belongs.

How long does it typically take to notice effects of vitamin D + K2 liquid?

Most people notice improvements in vitamin D levels within a few weeks of consistent supplementation, though full benefits typically emerge over 2 to 3 months as your body reaches optimal levels. Individual timelines vary based on how deficient you were to start, so patience and consistency matter more than immediate results.

How it works

1

Test your whole body

Get a comprehensive blood draw at one of our 3,000+ partner labs or from the comfort of your own home.

2

An Actionable Plan

Easy to understand results & a clear action plan with tailored recommendations on diet, lifestyle changes, supplements and pharmaceuticals.

3

A Connected Ecosystem

You can book additional diagnostics, buy curated supplements for 20% off & pharmaceuticals within your Superpower dashboard.

Superpower tests more than 
100+ biomarkers & common symptoms

Developed by world-class medical professionals

Supported by the world’s top longevity clinicians and MDs.

Dr Anant Vinjamoori

Superpower Chief Longevity Officer, Harvard MD & MBA

A smiling woman wearing a white coat and stethoscope poses for a portrait.

Dr Leigh Erin Connealy

Clinician & Founder of The Centre for New Medicine

Man in a black medical scrub top smiling at the camera.

Dr Abe Malkin

Founder & Medical Director of Concierge MD

Dr Robert Lufkin

UCLA Medical Professor, NYT Bestselling Author

membership

$17

/month
Billed annually at $199
A smartphone displays health app results, showing biomarker summary, superpower score, and biological age details.
A smartphone displays health app results, showing biomarker summary, superpower score, and biological age details.
What could cost you $15,000 is $199

Superpower
Membership

Your membership includes one comprehensive blood draw each year, covering 100+ biomarkers in a single collection
One appointment, one draw for your annual panel.
100+ labs tested per year
A personalized plan that evolves with you
Get your biological age and track your health over a lifetime
$
17
/month
billed annually
Pricing for members in NY & NJ is $499
Flexible payment options
Four credit card logos: HSA/FSA Eligible, American Express, Visa, and Mastercard.
Start testing
Cancel anytime
HSA/FSA eligible
Results in a week

Finally, healthcare that looks at the whole you