Free deliveryWhy The Wellness recommends this
Curated, not stocked.
We recommend pairing D3 with K2 rather than D3 alone because the two vitamins work in the same calcium-handling pathway. Supplementing D3 without K2 can raise circulating calcium without ensuring it reaches bone — a gap K2 is specifically studied to address. In the UK, where vitamin D insufficiency is common for most of the year, this combination earns its place as a sensible, well-reasoned daily baseline.
About this product
Vitamin D3 + K2
Vitamin D3 + K2 is a combined supplement pairing the two fat-soluble vitamins most closely associated with calcium regulation and bone mineralisation. Vitamin D3 (cholecalciferol) is the form the body synthesises from sunlight and the one most readily converted to the active hormone calcitriol. It supports calcium absorption in the gut and is widely studied for its role in immune modulation. Vitamin K2 (typically as menaquinone-7, or MK-7) directs that calcium toward the bones and away from soft tissue, including arterial walls — making the pairing more clinically coherent than either vitamin taken alone.
This combination suits people with confirmed low vitamin D on a blood test, those who spend limited time outdoors, individuals with darker skin tones living at northern latitudes, and anyone managing bone density concerns. It also fits well as a year-round baseline for people in the UK, where sunlight is insufficient for cutaneous D3 synthesis for much of the year.
D3 and K2 are both fat-soluble, so they are best absorbed alongside a meal containing dietary fat. The formulation brings together two nutrients that work in the same physiological pathway, reducing the need for separate capsules and making daily compliance more straightforward. For anyone optimising a supplement stack based on bloodwork, this is a rational starting point.
What it does
Benefits
- 01
Supports calcium absorption and bone mineralisation
- 02
D3 and K2 work together in the same metabolic pathway
- 03
May help maintain vitamin D levels through low-sunlight months
- 04
Studied for a role in immune regulation and defence
- 05
Helps direct calcium to bones rather than soft tissue
Get the most from it
How to use
Take with a meal that contains dietary fat, as both D3 and K2 are fat-soluble vitamins and absorb poorly on an empty stomach. Follow the dosage stated on the packaging. If you are taking this to address a confirmed deficiency, retest your vitamin D levels after 12 weeks to assess response.
What's inside
Ingredients
View full ingredient list
Bone health & immune support
Common questions
Frequently asked
Why take D3 and K2 together rather than separately?
Vitamin D3 increases calcium absorption, while K2 activates proteins that guide calcium into bone and away from soft tissue such as arterial walls. Taking them together addresses the full pathway rather than one step in isolation.
Do I need a blood test before starting this?
It is not strictly required, but a baseline vitamin D blood test is worthwhile. It tells you whether you are deficient or insufficient, and allows you to confirm — with a follow-up test — that your levels have actually responded to the supplement.
Who may not be suitable for this supplement?
People taking anticoagulant medications such as warfarin should speak to their doctor before taking vitamin K2, as K vitamins interact with clotting pathways. Those with hypercalcaemia or certain granulomatous conditions such as sarcoidosis should also seek medical advice first.
How long before I notice a difference?
Vitamin D is slow-acting. Measurable changes in serum 25(OH)D levels typically take several weeks of consistent supplementation. Benefits related to bone density take considerably longer. Most people do not notice a subjective difference — the value is in the bloodwork.
Should I take this every day, or can I dose less frequently?
Check the dosing guidance on the packaging. Daily dosing is generally preferred for fat-soluble vitamins at maintenance levels, as it keeps circulating levels stable. Higher-dose less-frequent protocols exist but are typically used under clinical supervision.
Doctor-guided care
Test before you supplement.
Bloods are the only way to know what your body actually needs. We'll tell you which of these supplements earn their place.
Book a panelFrom real customers
Reviews
No reviews yet
Be the first to share your experience.
Loading reviews…
