Vitamin D3 & K2
Vitamin D3 & K2
The vitamin most UK adults are short of, finally paired with the one that makes it work.
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Nutritional Information
Nutritional Information
Part of the Daily Essentials
Feel better, function better, every day. The three nutrients your body needs most and rarely gets enough of.
Why Vitamin D3 & K2?
UK adults are insufficient
Most people aren't getting enough vitamin D year-round. If you work indoors, live in the north, or rarely get outside, you're almost certainly one of them.
You just feel... off
Tired for no reason. Catching every cold going. Low energy, low mood, and never quite knowing why.
Give your body what it's missing
D3 and K2 work together to restore what your immune system and energy levels need to actually function. The way they should year-round.
The Power Of Vitamin D3 & K2
Why You’ll Love It
What It Supports
What’s Inside
How To Use It
Benefits Of Daily Use
Immune Function
Vitamin D contributes to the normal function of the immune system.
Bones & Muscles
D3 supports normal bones and muscle function. Most UK adults fall short in winter.
K2 Directs Calcium
Vitamin K2 helps steer calcium toward your bones rather than your arteries.
The UK Essential
We simply don't get enough sunlight here. This is the pairing most D3-only products skip.
| Why Choose NutriQuarter? |
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|---|---|---|
| High-Strength 3000 IU D3 + 100 µg K2 | ||
| Added K2 (MK-7) for Proper Calcium Use | ||
| GMP & BRC Certified Manufacturing | ||
| UK-Made & Quality Assured |
The NutriQuarter Standard
What does “science-backed” actually mean?
Anyone can put those words on a product page. Here’s what they mean for our Vitamin D3 & K2, and where you can check the evidence yourself.
The Ingredient
Vitamin D3 plus K2 (MK-7)
K2 helps direct calcium toward bone rather than soft tissue, the reason the two are paired rather than sold separately.
The Dose
75µg D3 (1500% NRV) + 100µg K2
A 2017 meta-analysis of 25 randomised trials, over 11,000 people, found vitamin D supplementation reduced the risk of acute respiratory infections, with the strongest effect in people who started out deficient. K2 as MK-7 is the long-acting form, staying active in the body for days rather than hours like MK-4.
The Formula
MK-7, the long-acting form of K2
MK-7 stays active in the body far longer than MK-4, the form used in most budget K2 products, so less is needed to maintain a steady level.
Don’t just take our word for it.
Read the authorised claim, review the research, and check the product specification.
Frequently Asked Questions
Why does this combine D3 and K2?
Vitamin D3 increases calcium absorption, but without K2, that calcium can end up in the wrong places, including your arteries. K2 (as MK-7) acts as a traffic director, guiding calcium into your bones and teeth where it belongs. The two work best together.
Why MK-7 and not MK-4?
MK-7 is the longer-acting form of K2. It stays active in your body for up to 72 hours compared to a few hours for MK-4, meaning more consistent coverage from a single daily dose.
How many capsules per day?
One capsule per day, taken with your main meal. D3 and K2 are both fat-soluble, so taking them with food that contains some fat improves absorption.
Is 3000IU of D3 safe?
Yes. The EU safe upper limit for daily D3 intake is 4000IU. 3000IU is an effective therapeutic dose, enough to meaningfully raise and maintain levels, without approaching excess.
Is this suitable for vegans?
This product is suitable for vegetarians. The capsule shell is plant-based HPMC, but the D3 (cholecalciferol) is derived from lanolin, which means it is not suitable for vegans.
How long until I notice a difference?
D3 builds up gradually. Most people see a meaningful change in blood levels within 6 to 8 weeks of consistent daily use. If you want to track your levels, a simple at-home finger-prick test will show your baseline and progress.
