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Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2
Serolla - D3 + K2

Over 18,437 customers have already made the switch

Serolla - D3 + K2

4.8 - 2,500+ Verified Reviews

SELLOUT RISK: High — Limited stock remaining

Rebuilds bone density and reduces hip and joint pain

Restores Your Energy From The Inside Out

Keeps calcium out of your arteries — protects your heart

Third-party tested · formulated by nutritional scientists

Customer Favorite!

Less than 1% return this product.

🚚

Free Shipping

on  order above $49.95

🛡️

60-day guarantee

risk-free trial

🔬

Clinically tested

GMP certified 

Is This For You

if you work indoors, live somewhere with limited sunlight, or are over 40, the answer is almost certainly yes. Studies show nearly 1 in 2 adults in the Western world don't get enough vitamin D. And K2 deficiency is even more common. 

 

You don't need to have bone pain or feel exhausted to benefit — by the time symptoms show up, your levels have been low for years. This is a supplement most people should be taking. Most people aren't.

How Does It Work

Your body needs vitamin D3 to absorb calcium from food. Without it, barely any gets in — no matter how well you eat. But D3 alone isn't enough. Without K2, that calcium has no destination. It floats in your blood and can deposit in your arteries instead of your bones. 

 

K2 acts as the guide — it sends calcium exactly where it belongs and keeps it out of where it doesn't. One without the other is half the job. Together they work the way your body was designed.

Shipping & Returns

Orders are processed within 1–3 business days. Delivery takes 7–12 business days after dispatch. If your order hasn't arrived within that window, contact us and we'll sort it immediately.

 

Try it for 60 days. If you feel no difference, contact us and we send your money back in full. No forms. No questions. No hassle.

Over 18,000 Customers Love Their Results

Margaret

Verified Review

"My doc said I needed D3, but I didn't want anything synthetic. I take this daily and it's helped my mood and bones so much. Will keep ordering!"

David 

Verified Review

I was skeptical — I'd tried cheap vitamin D before and felt nothing. This is completely different. The energy shift by week 6 was real. I'm 61 and feel better than I did at 40."

Ava

Verified Review

"I'd had hip pain for two years and just accepted it as part of getting older. After 3 months on this I wake up without that morning stiffness. My GP actually asked what I changed."

The science — simply explained

Why Do You Actually Need D3 AND K2?

Almost half of all adults are low in vitamin D right now. Not a little low. Significantly low. And most of them have no idea — because the symptoms sneak up slowly over years.

Think of it like this.

Your body is trying to build a house — and calcium is the brick.

 

🚚 D3 is the truck that delivers the bricks to the site.

 

🎯 K2 is the builder that puts the bricks exactly where they belong — into your bones.

 

Without the truck? No bricks arrive. Without the builder? The bricks get dumped in the wrong place — like inside your artery walls.

 

That's not a metaphor. That actually happens. It's called arterial calcification and it's one of the biggest hidden causes of heart problems in adults over 50.

 

✓ Calcium goes into your bones — where it makes them stronger

✓ Calcium stays out of your arteries — where it would cause harm

✓ Your body finally gets what it has been missing

 

One without the other is half the job.
Together they do what neither can do alone.

WHO NEEDS THIS MOST

Is Vitamin D3 + K2 Right For Me?

This is especially important for you if any of the following apply:

You're a woman going through or after menopause — bone loss accelerates dramatically when oestrogen drops

You're over 40 — because after 40 your skin produces up to 50% less vitamin D from the same amount of sunlight

You spend most of your day indoors — no sunlight on your skin means no D3 production, period

You don't get much sun year-round — from autumn to spring, most people simply can't make enough D3 naturally

You feel tired even after sleeping, catch colds easily, or have been told your bones are thinning

You have a gut condition like Crohn's or coeliac disease that reduces vitamin absorption

Tested and recommended by specialists

Designed to deliver results you actually feel — from the first month.

4-6

WKS

Energy change

Customers report noticeably steadier energy within 4–6 weeks

23

%

Fall risk reduction

Clinical trials: D3 reduces fall risk in adults over 65 by up to 23%

1

in

2

Adults deficient

Nearly half of all adults in the Western world are significantly low in vitamin D

15

+

Clinical studies

The MK-7 K2 form in Vital is backed by more human studies than any other K2

What actually changes

the benefits

Short, simple, real.

🦴

Hip and back pain reduces
Title

Your bones thin when calcium doesn't reach them. D3 pulls calcium in from food. K2 sends it straight to your bones. Less thinning. Less pain. It's that simple.

Most customers feel less stiffness within 3–4 months

⚡

Energy that doesn't crash at 2pm
Title

Low D3 makes your cells produce less energy — no matter how much you sleep. It's not tiredness. It's your battery stuck at 40%. Restore D3 and your cells start working properly again.

Most customers notice the shift within 4–6 weeks

💪

Stronger legs — steadier balance
Title

Every muscle has vitamin D receptors. When D3 is low they go quiet. Legs feel heavy. Balance gets worse. Restore D3 and muscles fire properly again.

Clinical evidence: 23% fall risk reduction in adults over 65

❤️

Arteries that stay flexible
Title

Without K2, calcium can harden your artery walls like pipes. K2 actively pulls calcium out of arteries and redirects it to bone instead. Your heart works less hard.

Protection that compounds quietly from the very first dose

🛡️

Fewer colds — shorter when they come
Title

D3 activates your immune system's front line. When D3 drops in autumn, so does your defence. Viruses get in before your body reacts. Restore D3 and you catch less, recover faster.

One winter on Vital. Then you'll understand the difference.

☀️

Mood that doesn't flatline in winter
Title

D3 triggers serotonin in your brain. When D3 drops in autumn, so does your mood. That grey, flat feeling from October to March is not your personality. It's a deficiency. Correctable.

Winter feels different — lighter, more manageable

Why thousands of people trust us

Serolla vs Other Brands

Serolla 

D3 + K2

Other brands

D3 + K2 combined in one capsule

Clinically validated MK-7 K2 form

Correct clinical dose of both vitamins

Third-party tested for purity

No fillers — clean ingredients only

GMP certified facility

60-day money-back guarantee

2,500+ Verified Reviews!

What Our Customers Say

Patricia M.

Phoenix, AZ · 59 yrs · ✓ Verified

"I had pain running down my right leg for almost a year. Two doctors told me it was my sciatic nerve. A friend suggested I get my vitamin D tested — it was critically low. I started D3 + K2 and within three weeks the pain was almost completely gone. Four months later and it hasn't come back."

Robert H.

Chicago, IL · 45 years old · ✓ Verified

"I've been deficient in vitamin D for years and just kept taking regular D3. My levels barely moved — hovering around 20 for almost a decade. My doctor suggested switching to D3 combined with K2. Within three months my levels jumped to 66. I also noticed my energy through winter was completely different — I didn't get that heavy, unmotivated feeling I'd had every year since my fifties."

Sandra T.

Boston, MA · 53 yrs · ✓ Verified

"I just entered menopause and my doctor told me to start taking D3 + K2 specifically for bone strength. I was nervous about adding another supplement but this has been completely easy — no aftertaste, no stomach issues, tiny capsule. Three months in and my follow-up bone scan showed no further thinning. My doctor was pleased. I'm staying on this indefinitely."

Eline V.

Stockholm · 48 yrs · ✓ Verified

We live in northern Europe and get almost no sun from October to April. Our whole family takes this — two adults, my mother who is 75, and my teenage kids. Since we started, so much more energy across the board. My mother in particular — she used to really struggle through winter. This past winter was the first time in years she didn't spend half of it feeling run down and catching everything going round."

James K.

London · 53 yrs · ✓ Verified

"I can feel the difference if I accidentally miss a day. My energy is steadier, my knees feel better, and for the first time in years I've gone a full winter without a chest infection."

Carol B.

Toronto · 61 yrs · ✓ Verified

"Takes time — don't expect a miracle in week one. I noticed nothing for the first month and almost stopped. By month two something shifted. The afternoon energy crash I'd lived with for years just stopped happening. My husband noticed before I did — he said I seemed like myself again. I'm on my third bottle now and not planning to stop. Wish I'd started years ago."

Feel a difference in 60 days — 

or your money back.

60-day money-back guarantee · No questions asked · No forms to fill

Everything you need to know

Frequently Asked Questions

How long until I feel a real difference?

Energy and mood improvements typically arrive within 4–6 weeks. Bone density and joint pain improvements take longer — usually 3–6 months, because bone tissue rebuilds slowly. Our honest advice: give it a full 8 weeks before forming an opinion. And if possible, get a 25(OH)D blood test before and after — seeing your levels normalise in black and white is genuinely motivating.

My multivitamin already has vitamin D in it. Do I still need this?

Almost certainly yes. Most standard multivitamins contain 400–600 IU of vitamin D — a fraction of the 2,000 IU research consistently shows is needed to make a measurable difference, especially for adults over 55 or in low-sunlight climates. They also rarely include meaningful quantities of K2. A dedicated D3 + K2 supplement is a completely different proposition to a multivitamin.

Why do D3 and K2 need to be taken together?

This is the most important question on this page. D3 increases calcium absorption — significantly. Without K2 to direct that calcium into bone, the excess can deposit in arteries and soft tissue instead. Some studies suggest that high-dose D3 taken without K2 may actually increase arterial calcification risk. K2 is not a bonus add-on. It is essential. They are a team — always.

How long should I take this?

If your doctor has a recommendation, it is best to follow that. Most people find Better D3 + K2 to be best taken long-term for lasting health benefits. I take it all year round. Do not take more than the daily recommended dose.

 

Many people take it at the same time every day or with food. If it's hard on your stomach or you prefer to spread it out, you can split up the dose throughout the day. Everyone is different.

When should I take it, and how?

One capsule daily with your largest meal — breakfast or lunch is ideal. Both D3 and K2 are fat-soluble vitamins, meaning they absorb dramatically better when there's dietary fat present. The organic olive oil in each capsule already helps with this, but taking it with a meal that includes some fat (eggs, avocado, cheese, olive oil dressing) optimises absorption further. Morning dosing is slightly preferable for energy.

What if it simply doesn't work for me?

Full 60-day money-back guarantee. If you don't experience any benefit within 60 days, email us and we will refund you completely — no forms, no lengthy process, no passive-aggressive questions about whether you "followed the instructions." We stand behind this product because we know what it can do. But if it's not right for you, that's fine — your money comes back.

What are the side effects?

Better D3 + K2 is considered safe and well-tolerated, with few reported side effects. However, in some individuals, excessive intake of Vitamin D3 or K2 may cause gastrointestinal disturbances such as nausea or stomach discomfort. It is important to follow the recommended dosage and consult with a healthcare professional.

How much is in it and how do I take it?

Each bottle of Better D3 + K2 contains 30 softgels. Each bottle contains 30 servings of clinically effective doses of Vitamin D3 and K2.

 

Take one (1) softgel once daily or as directed by your medical provider. If it upsets your stomach, try taking it with food. Every body is a little different, so try out different times of the day to see what works best for you.