Vitamin D3 + K2 Supplement for Bone & Immune Support, daily.
PURETREX Vitamin D3 + K2 is an 8-ingredient advanced formula built around high-strength Vitamin D3 (10,000 IU) and Vitamin K2 (MK-7, 500mcg) — two nutrients that work together to support bone health and normal immune function. Vitamin D3 contributes to the maintenance of normal bones and the normal function of the immune system, while Vitamin K2 helps direct calcium where your body needs it most. Enhanced with Omega-3, Magnesium Glycinate, Astaxanthin, and Black Pepper Extract for improved absorption. One pouch. 180 days of daily support.
What Vitamin D3 + K2 Advanced Formula supports.
Each ingredient selected for its role in bone, immune, and daily wellness support.
Supports Bone Health
High-strength Vitamin D3 (10,000 IU — 250mcg per softgel) contributes to the maintenance of normal bones and normal absorption of calcium and phosphorus — while Vitamin K2 MK-7 (500mcg) helps direct calcium to where your body actually needs it: your bones and teeth, not your arteries.*
Supports Immune Function
Vitamin D3 contributes to the normal function of the immune system — yet most adults in the UK don't get enough, especially between October and March. Each softgel delivers 10,000 IU (1250% NRV), supported by Black Seed Oil (50mg) — one of the most traditionally valued botanicals for overall wellness.*
Antioxidant Protection
Astaxanthin (1mg) — one of the most powerful natural carotenoids — paired with Omega-3 fatty acids (DHA + EPA, 100mg) to help protect cells from oxidative stress. Both are oil-soluble, delivered in an Organic Coconut Oil base (50mg) for natural absorption alongside all fat-soluble actives in the formula.*
Enhanced Absorption
Black Pepper Extract (5mg) included in every softgel to enhance the bioavailability of all active ingredients — especially fat-soluble vitamins D3 and K2. Combined with Magnesium Glycinate (25mg), a chelated form chosen specifically for its superior absorption over cheaper magnesium oxide alternatives.
*Vitamin D contributes to the maintenance of normal bones and the normal function of the immune system. Vitamin K contributes to the maintenance of normal bones.
Made for people who want natural daily support.
If any of these sound like you, this formula was built with you in mind.
"I want to support my bones and immune system naturally"
You know Vitamin D matters — your GP mentioned it, or you've read about UK deficiency rates. You want a high-strength daily formula that actually delivers on dose, not a token 400 IU tablet from the supermarket. You want real support for your bones, teeth, and immune system all year round.
"I don't want to take D3 without K2"
You've done the research. You know that D3 without K2 means calcium can end up in the wrong places. This formula pairs both at proper doses — 10,000 IU D3 with 500mcg K2 MK-7 — plus Magnesium Glycinate to help your body absorb and use that calcium properly. Most D3+K2 products leave magnesium out entirely.
"I'm tired of buying 5 different supplements"
You want one comprehensive formula instead of separate D3, K2, magnesium, omega-3, and black seed oil products. Eight active ingredients in one softgel. One pouch lasts 180 days. No more cluttered shelves, no more forgetting which one to take when.
8 Ingredients.
Each one earns its place.
Tap any ingredient for sourcing, dosage, and published science. No fillers. No proprietary blends. Every dose fully disclosed.
Vitamin D3 (Cholecalciferol)
The primary active in this formula — contributes to the maintenance of normal bones, normal teeth, normal muscle function, and the normal function of the immune system. High-strength 10,000 IU (250mcg) per softgel — 1250% NRV.*
Vitamin K2 MK-7
Contributes to the maintenance of normal bones and normal blood clotting. MK-7 is the long-acting form of K2 — it stays active in your body longer than MK-4, directing calcium to bones and teeth where it belongs.*
Omega-3 Fatty Acids (DHA + EPA)
Essential fatty acids that support overall wellness and help protect cells from oxidative stress. Included to complement the fat-soluble vitamins D3 and K2, providing an oil-based delivery system for improved absorption.*
Astaxanthin
One of the most powerful natural carotenoids — helps protect cells from oxidative stress. Astaxanthin is what gives salmon and shrimp their pink colour. Oil-soluble, so it's naturally absorbed alongside the D3 and K2 in this formula.*
Magnesium Glycinate
Contributes to the maintenance of normal bones, normal muscle function, and normal functioning of the nervous system. Delivered as glycinate — a chelated form chosen for its superior absorption over cheaper magnesium oxide. 25mg provides 24% NRV.*
Black Seed Oil
One of the most traditionally valued botanicals for overall wellness and immune support. Used for centuries across multiple cultures. Included to complement the immune-supporting properties of Vitamin D3 in this formula.*
Organic Coconut Oil
A natural carrier oil that enhances the absorption of all fat-soluble ingredients in this formula — especially Vitamins D3 and K2, which require dietary fat to be properly absorbed. Organic, cold-pressed, no chemical solvents.*
BioPerine® Black Pepper Extract
Enhances the bioavailability of all other active ingredients in this formula — so your body absorbs more of what you're taking. Standardised to 95% piperine, the bioactive compound in black pepper responsible for improved nutrient uptake.*
*Food supplement. Not intended to diagnose, treat, cure, or prevent any disease. Vitamin D and Vitamin K health claims are EFSA-approved. Consult your healthcare professional before use.
How to take it.
Take 1 Softgels
Take one softgel daily with water, preferably with a meal. The fat in your meal helps your body absorb the D3 and K2.
Stay Consistent
Same meal, every day. Daily consistency is what delivers results — not perfect timing.
One Pouch = 180 Days
180 softgels per pouch means six full months of daily support. One reorder, not six.
Quality you can verify.
Every claim backed by what's in the pouch. No shortcuts.
Third-Party Lab Tested
Every batch independently verified for potency and purity. Certificate of analysis available on request.
MK-7 Form of K2 Verified
Vitamin K2 delivered as Menaquinone-7 — the long-acting form with up to 72-hour half-life, verified per batch.
Zero Artificial Fillers
No magnesium stearate, no silica, no synthetic additives. Clean formula.
GMP-Certified Manufacturing
Produced in facilities meeting current Good Manufacturing Practice standards.
30-Day Money-Back Guarantee
Not satisfied? Full refund. No questions asked.
Free Shipping Over £60
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Every batch independently lab tested.
We don't just claim quality — we prove it. Every production batch of our Vitamin D3 + K2 is sent to an independent third-party laboratory for full potency and purity testing before it reaches you.
Frequently Asked.
Everything you need to know before you start.
It's a daily supplement that combines high-strength Vitamin D3 (10,000 IU) with Vitamin K2 (MK-7, 500mcg) and 6 supporting ingredients — Omega-3, Astaxanthin, Magnesium Glycinate, Black Seed Oil, Organic Coconut Oil, and Black Pepper Extract. Vitamin D3 contributes to the maintenance of normal bones and the normal function of the immune system. Vitamin K2 helps direct calcium to your bones and teeth where it belongs.
Anyone looking to support their bone health and immune system with a high-strength daily formula — especially if you live in the UK where sunlight levels are too low for natural Vitamin D production for much of the year. Also popular with people who want D3 and K2 together at proper doses rather than taking them separately. Not intended for children, pregnant, or breastfeeding women.
Every batch is third-party lab tested for potency, purity, and contaminants. Manufactured in GMP-certified facilities in the UK. The Vitamin K2 is verified as the MK-7 form — the long-acting variant with a half-life of up to 72 hours. Zero artificial fillers, binders, or synthetic additives.
Many customers pair this with our Oil of Oregano for immune support and Pumpkin Seed Oil for hair and men's health as part of their daily stack. Avoid taking additional Vitamin D supplements alongside this product, as 10,000 IU is already a high-strength dose. If you're on blood thinners or prescription medication, consult your healthcare provider first — Vitamin K2 can interact with anticoagulant drugs.
10,000 IU is roughly what your body produces from 30 minutes of direct midday sunlight — but in the UK, most people don't get anywhere near that exposure, especially between October and March. The NHS recommends at least 400 IU daily, with the safe upper limit set at 4,000 IU by EFSA. Higher-strength doses like 10,000 IU are widely available across the UK market and are commonly used by people looking to address existing deficiency or maintain optimal levels — particularly if blood tests have shown low Vitamin D. If you're unsure about the right dose for you, consult your GP — a simple blood test can check your levels. Some people take 10,000 IU daily; others take it every few days. Your healthcare provider can advise based on your results.
Ready to start your daily routine?
180 softgels. 8 ingredients. 180 days of support.