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Practitioner grade
Practitioner only
Vitamin D3 with K2 (MK-7)
Vitamins D3 and K2 for bones, heart and immune function
Combines vitamin D3 with MK-7 (the most bioavailable vitamin K2 form), D3 increases calcium absorption, K2 directs calcium to bones and away from arteries.
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Practitioner consult session
A 15-minute consultation. An email link will be included in your order confirmation to make the booking.
Optional 1:1 with our clinical team · $49
TGA-listed AUST L
Practitioner-grade formula
Clinician-reviewed before dispatch
Ships in 2 business days
What's in it
Each ingredient is in its most bioavailable form, at a clinically meaningful dose. No fillers, no token amounts, no marketing-led blends.
Cholecalciferol
Vitamin D3 (cholecalciferol)
The active vitamin D form. Increases intestinal calcium absorption and supports immune, bone and hormonal health.
Included
MK-7 from fermentation (most bioavailable K2 form)
Vitamin K2 (MK-7, menaquinone-7)
Long-chain menaquinone with 3-day half-life. Activates osteocalcin (bone mineralisation) and matrix Gla protein (arterial calcium inhibition). Synergistic with D3 for both bone and cardiovascular benefit.
Included
Always read the label and follow directions for use. Vitamins and minerals can only be of assistance if dietary intake is inadequate. If symptoms persist, consult a healthcare professional.
How to take it
Simple to take, with a few timing notes that make a real difference to absorption.
As directed by your practitioner. Take with a fat-containing meal, both D3 and K2 are fat-soluble.
Vitamin K2 may interact with warfarin (anticoagulant medication), consult your doctor before use if taking warfarin. Vitamin D toxicity is possible with excessive supplementation. Dietary supplements should not replace a balanced diet.
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Back to Energy & Fatigue →Frequently asked.
Common questions about how OptiLabs works: testing, supplements, clinician review, returns and timing.
I'm on warfarin — can I take K2?
Warfarin works by blocking vitamin K-dependent clotting factors. Any form of vitamin K (including K2) can interfere with warfarin therapy. If you are on warfarin, do not take vitamin K2 without the direct approval of the doctor managing your anticoagulation.
Are the supplements safe?
All carry an AUST L designation from the TGA. Every order is reviewed by a clinician before dispatch.
Do I need a referral?
No. All tests are available to order directly. Our lab partner is NATA and RCPA accredited, operating as a direct-access pathology service.
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