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The #1 daily capsule for aging well

4.8/5 (12,000+ reviews)

High-Potency Vitamin D3 & K2 Softgels (6 Month Supply)

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1,347 clinicians share this on FrontrowMD without compensation.

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10,000 IU D3 + 200 mcg K2 (MK-7) Per Softgel

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Supports Bone Density & Calcium Absorption

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Boosts Immune System Function

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Supports Heart & Cardiovascular Health

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Made With Coconut Oil for Maximum Absorption

•60-day risk-free guarantee • Free US shipping.

Tested by third-party labs in

15 substances tested for quality

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Enjoy 60 days of free returns, with less than 1% of customers asking for their money back.

Before & Afters

See the improvements that other poeple had just like YOU!

Michael D

Verified Facebook Comment

Doctor said my Vitamin D was at 18 — dangerously low. After 3 months on this my levels are at 62. Energy is completely different. I used to crash by 2 PM every day, now I'm active until evening. Taking this alongside my Primus garlic extract — both are part of my daily routine now.

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James W

Verified Facebook Comment

Was taking D3 and K2 separately from two different brands. Switched to this because it's combined and the dose is actually clinical — 10,000 IU not the useless 1,000 IU most brands sell. My winter immunity has been noticeably better. Haven't had a cold since I started. Simple, one softgel, done.

Like · Comment · 15m

Linda K

Verified Facebook Comment

Bought this for my husband after his doctor recommended D3 and K2 for his bone density. He's been taking it for 4 months now. His last DEXA scan showed improvement for the first time in years. We've now both started taking it. The 6-month supply makes it such good value.

Like · Comment · 2h

Thomas R

Verified Facebook Comment

My GP tested my Vitamin D and it was 22. He said take a supplement but didn't specify which. Did my own research — found that most D3 supplements are underdosed and missing K2. This has the right dose of both. Three months later my levels are at 58 and I feel sharper, sleep better, and have more energy on my morning walks.

Like · Comment · 45m

Patricia L

Verified Facebook Comment

I started this because I read that K2 keeps calcium out of your arteries. I'm already taking the Primus garlic for blood pressure so adding this felt like the right move for my heart. 4 months in, my energy is up and my mood is genuinely better — I didn't expect that. My daughter noticed before I did

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Robert M

Verified Facebook Comment

Was skeptical about another supplement but my pharmacist friend told me most people over 50 are Vitamin D deficient and don't know it. Got my levels tested — she was right, I was at 19. Started this and within a month I noticed less joint stiffness in the mornings and better sleep. The 180 count is brilliant — I hate reordering every month.

Like · Comment · 3h

THE HARD STATISTICS

The Vitamin 80% of Adults Over 50 Are Deficient In

After age 50, your skin produces 50 to 75% less Vitamin D from sunlight than it did in your 30s. Spending time outdoors isn't enough anymore — your body physically can't convert sunlight into Vitamin D the way it used to.

Vitamin D deficiency is linked to weaker bones, poor immune function, low energy, and increased cardiovascular risk. Most adults over 50 are deficient without knowing it.

Primus D3+K2 delivers 10,000 IU per softgel — the dose research shows is needed to restore optimal blood levels. Paired with 200 mcg of K2 (MK-7) to ensure calcium goes into your bones, not your arteries.

One softgel daily. Made with coconut oil for maximum absorption.

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YOU NEED K2

Why K2 Matters More Than You Think

Most D3 supplements leave out K2. That's a problem.

Vitamin D3 increases calcium absorption in your gut — that's its job. But without K2, your body doesn't know where to put that calcium. It can end up in your arteries, kidneys, and soft tissue instead of your bones.

K2 activates the proteins that direct calcium where it belongs — into bones and teeth, away from your arteries. Think of D3 as the delivery truck and K2 as the driver. Without the driver, the delivery goes to the wrong address.

Primus uses MK-7 — the most bioavailable form of K2. It stays active in your body for up to 72 hours, compared to MK-4 which depletes within hours. One softgel gives you both D3 and K2 in the clinically studied doses. No need to buy them separately.

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The science behind Primus

One Softgel. Four Systems Supported.

Vitamin D3 and K2 don't just support one thing. They work across multiple systems simultaneously:

Bone density — D3 increases calcium absorption. K2 directs it into bones. Together they reduce fracture risk and support bone mineral density, especially critical after age 50.

Immune function — D3 modulates immune response, helping your body fight infections while reducing overactive inflammation. Research shows people with optimal D levels get sick less often and recover faster.

Cardiovascular health — K2 prevents arterial calcification by keeping calcium out of blood vessel walls. For anyone already taking aged garlic extract for blood pressure, D3+K2 supports a different but complementary cardiovascular mechanism.

Mood and energy — D3 supports serotonin production. Low Vitamin D is linked to fatigue, low mood, and poor sleep quality. Most people notice improved energy within 2 to 4 weeks of correcting a deficiency.

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BACKED BY WORLD-CLASS SCIENTIFIC EXPERTISE

Trusted by healthcare professionals

If you want to understand the science behind Primus, explore our research-led resources for clinical background, formulation logic, and educational support.

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Need more answers about all our products?

Frequently Asked Questions

Why do I need K2 with my D3?

D3 increases calcium absorption, but without K2, that calcium can deposit in your arteries instead of your bones. K2 activates proteins that direct calcium where it belongs — into bones and teeth, away from blood vessels and soft tissue. Taking D3 without K2 is like hiring a delivery truck with no driver.

Isn't 10,000 IU too much?

Most adults over 50 with a deficiency need 5,000 to 10,000 IU daily to restore optimal blood levels (50-80 ng/mL). Standard 1,000 to 2,000 IU supplements often aren't enough to move the needle. If you're unsure, ask your doctor for a simple Vitamin D blood test to check your current levels.

How long does one pouch last?

180 softgels at one per day = a full 6-month supply. No need to reorder every month.

How long before I see results?

Most people notice improved energy and mood within 2 to 4 weeks. Bone density improvements take longer — 3 to 6 months of consistent use. We recommend getting your Vitamin D levels tested before starting and again at 3 months to track your progress.

Can I take this with my other supplements?

Yes. D3+K2 has no interactions with aged garlic extract, nattokinase, magnesium, fish oil, or standard blood pressure medications. Many of our customers take it alongside Primus Aged Garlic Extract as part of their daily heart health protocol.

What's your guarantee?

Your order is backed by our 60-day, 100% money-back guarantee. If you don't see improvements in your overall well-being — or you're not satisfied for any reason — contact us within 60 days of delivery. We'll refund your full purchase price. No return required. No questions asked.

We believe in this product enough to take on all the risk. You just have to try it.

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60-Day Money-Back Guarantee

Try D3+K2 for 60 days. If you don't notice improvements in energy, mood, or overall wellbeing — you'll get a refund, no questions asked.

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