Bone & Heart Support

D3 and K2 work as a system. Taking one without the other is an incomplete protocol.

The science

Vitamin D3 dramatically increases calcium absorption from the gut — that part is well established. The problem is what happens next. Without the right signalling proteins, absorbed calcium doesn’t automatically reach bone. It can end up in arterial walls instead.

Vitamin K2 — specifically MK-7, the most bioavailable and longest-acting form — activates two proteins that solve this: osteocalcin, which binds calcium into bone matrix, and matrix Gla protein (MGP), which actively prevents arterial calcification. Population data consistently links low K2 status with higher rates of cardiovascular calcification.

This formula also includes BioPerine® — a standardised black pepper extract clinically shown to enhance absorption of fat-soluble micronutrients like D3 and K2.

How to take it

1 capsule twice daily, 20–30 minutes before a meal. D3 and K2 are fat-soluble — absorption is meaningfully higher when taken with food containing fat.

What’s inside

Every batch independently tested. Scan the QR code on your label to view the Certificate of Analysis for your exact batch.
Serving size: 1 capsule | 60 servings
Calcium (as Calcium Carbonate): 210mg | Vitamin D3 (Cholecalciferol): 125mcg (5,000 IU) | Vitamin K2 (as Trans-MK-7): 100mcg | BioPerine® (Black Pepper): 5mg
Gluten-free. Non-GMO. Vegetarian.

Common questions

Why do D3 and K2 need to be taken together?
D3 increases calcium absorption. K2 activates the proteins that direct that calcium to bone and prevent it from depositing in arterial walls. Without adequate K2, high D3 intake may worsen arterial calcification over time. The combination addresses a genuine metabolic dependency.

What makes MK-7 better than MK-4?
Half-life. MK-7 stays active in the body for around 72 hours; MK-4 is gone in a few hours. MK-7 maintains stable blood levels from a single daily dose. It’s also more bioavailable and more effective at activating osteocalcin and MGP. The bone and cardiovascular evidence is stronger with MK-7.

What does BioPerine do?
It enhances the bioavailability of fat-soluble nutrients. Studies show it increases absorption of co-administered nutrients by up to 20%. For vitamins D3 and K2, which already need dietary fat for absorption, BioPerine provides an additional uptake mechanism.

I already take a D3 supplement. Can I add this?
Check your total daily D3 intake first. This formula contains 5,000 IU per capsule. Adding this to a separate D3 supplement could push you above the tolerable upper limit (4,000 IU/day for most adults). Get your 25(OH)D levels tested if you’re unsure.

How long before I see results?
For serum vitamin D, levels typically rise meaningfully within 4–8 weeks. For bone density, meaningful changes take months to years — bone remodelling is slow. For arterial stiffness markers, studies showing K2 effects typically run 3+ years. These are long-term protective compounds, not short-term performance supplements.