Why Vitamin D

The Vitamin Most Of The UK Runs Low On

Your main source of vitamin D is not food - it is sunlight on your skin. But from October to early March, UK sunlight does not contain enough UVB for your body to make any, and diet alone rarely covers the gap. Running low can show up as tiredness, aching muscles, low mood and catching every bug going round.

That is why UK government advice is that everyone should consider a daily vitamin D supplement through autumn and winter - and why we made ours one quick orange-flavour spray, with K2 to put the calcium where it belongs.

1 in 5 UK adults are estimated to have low vitamin D levels
Oct-Mar When UK sunlight is too weak for your skin to make vitamin D
4000 IU High-strength daily dose in every spray
Two Vitamins, One Daily Spray

The Kollo Difference

Two Vitamins, One Daily Spray

Vitamin D3 and K2 are a natural pairing. D3 supports your immune system and helps your body absorb calcium, while K2 (MK-7) helps direct that calcium towards your bones. Our orange-flavour spray delivers both in seconds, with no pills to swallow.

  • 4000 IU of Vitamin D3A high-strength 4000 IU dose of Vitamin D3 per serving, supporting immune function and the maintenance of normal bones, teeth and muscles.
  • 100mcg of Vitamin K2 (MK-7)Vitamin K2 as MK-7 works alongside D3, helping direct calcium towards the bones where it is needed.
  • One quick daily sprayAn orange-flavour oral spray absorbed directly in the mouth. No pills, no water, no fuss.

Loved By Thousands

Trusted Across The Kollo Range

Rated 4.7 from 4,500+ reviews
Wellbeing

Amazing!

Love my Kollo, noticed improvement in skin, hair, nails and joint health, feel amazing at 61

Sue W Kollo subscriber
Energy

Amazing

I have been taking Kollo for a 3 months, I my hair nail and strength in myself has improved so much. Don't feel as tired, lots of energy. Love it! Would recommend to all my friends 🧡

Asha M Kollo subscriber
Skin

Game changer

I was delighted and super surprised as I big sceptic of any supplements, that Kollo actually had visible changes to my body and skin. My stomach bloating has gone and around my eyes too. My skin looks rehydrated and supple and young again. I am blown away!

Camilla J Kollo subscriber
Energy

This has been a game changer for me!

When I started taking Kollo, I had awful acne, my hair was short because bleach had damaged it, and I had bad fatigue! I have now been taking Kollo for 6 years and it’s honestly made a huge difference! My hair is long and strong (my hairdresser can’t believe how long my hair has grown), my acne has cleared, and I am full of energy! I’d never tried collagen before I got Kollo, and I’m so glad I invested in Kollo! People have even started telling me that I look younger.

Simona S Kollo subscriber
Routine

The best

I have been using Kollo for a while now. I love it, growing my nails out and they are growing really strong and healthy. I have kollo every morning and really think it is worth it. Skin, nails and hair haven’t looked better for a while. So thank you!

Katie B Kollo subscriber

Inside The Bottle

Two Vitamins. One Spray.

A high-strength dose of Vitamin D3 with Vitamin K2 (MK-7), designed to work together for everyday immune and bone support.

Vitamin D3 [4000 IU]

Vitamin D3 [4000 IU]

A high-strength 4000 IU (100mcg) dose of Vitamin D3 (cholecalciferol) per daily serving. Vitamin D contributes to normal immune function, the maintenance of normal bones, teeth and muscle function, and the normal absorption of calcium.

Per Daily Serving

  • Vitamin D3 (cholecalciferol) - 4000 IU / 100mcg
  • Supports immunity, bones and teeth
Vitamin K2 [100mcg MK-7]

Vitamin K2 [100mcg MK-7]

100mcg of Vitamin K2 as MK-7, a highly bioavailable form. Vitamin K contributes to the maintenance of normal bones and works alongside D3 to help direct calcium where your body needs it.

Per Daily Serving

  • Vitamin K2 (MK-7) - 100mcg
  • Supports normal bone maintenance

The Benefits

What This Spray Supports

Everyday immune support

Vitamin D3 supports the normal function of the immune system, all year round.

Strong, healthy bones

D3 and K2 work together to support the maintenance of normal bones and teeth.

Calcium where it counts

D3 supports calcium absorption and K2 (MK-7) helps direct it towards your bones.

Normal muscle function

Vitamin D contributes to the maintenance of normal muscle function.

What To Expect

Your First 12 Weeks On The Spray

Week 1

One spray, done

The habit takes seconds - one orange-flavour spray each morning. No pills, no water, no fuss.

Weeks 2-6

Your levels build

Vitamin D is stored in the body - consistent daily top-ups steadily rebuild your reserves.

Weeks 8-12

A stronger baseline

With daily use your levels settle at a healthier point, supporting normal immunity, bones and muscles.

Week 12+

Winter-proofed

From October to March, UK sunlight cannot do the job - your daily spray keeps you covered all season.

Vitamin D is a store you top up, not a quick fix - which is why the spray is built as a subscription, so you never run out mid-winter.

Start Today

The Kollo Standard

Immunity And Bone Support, Made Simple

4000IU
High-strength Vitamin D3 in every daily serving.
100mcg
Vitamin K2 as MK-7 in every daily serving.
15ml
An easy orange-flavour oral spray, no pills to swallow.
4.7
The average review score from thousands of Kollo customers.

Everything You Need To Know

Frequently Asked Questions

What is in the Vitamin D3 + K2 Oral Spray?

Each daily serving delivers 4000 IU of Vitamin D3 and 100mcg of Vitamin K2 (MK-7) in a light orange-flavour oral spray.

Is 4000 IU safe to take every day?

Yes. 4000 IU (100mcg) is the recognised safe upper daily limit for adults in UK guidance, so the spray gives you high-strength support without exceeding it. If you are taking other supplements containing vitamin D, or have a medical condition, check with your GP or pharmacist.

How do I use it?

Shake gently, then spray twice directly into the mouth once a day, or as directed on the label. No water and no pills needed.

Why take D3 and K2 together?

Vitamin D3 helps your body absorb calcium, while K2 (MK-7) helps direct that calcium towards the bones. Together they support normal bones and immune function.

Do I still need it if I eat well?

Very likely, in a UK autumn and winter. Sunlight - not food - is your main source of vitamin D, and from October to early March UK sunlight is too weak for your skin to make any. Only a few foods contain meaningful amounts, which is why government advice is that everyone should consider a daily supplement through the darker months.

Can I take it alongside my collagen?

Yes - the spray works well alongside any Kollo product as part of your daily routine. Many customers take both together in the morning.

When will I notice the benefits?

Vitamin D works best taken consistently every day, which is why many customers subscribe so they never run out. Support for immunity and bones builds with regular daily use.

Allergens and suitability

Please refer to the product label for full ingredient, allergen and suitability information before use.

Can I subscribe?

Yes. Choose the subscription option to save versus a one-time purchase and have it delivered automatically. You can skip, pause or cancel anytime in a couple of clicks.

5.0
Rated 5.0 out of 5 stars
Based on 3 reviews
Total 5 star reviews: 3
Total 4 star reviews: 0
Total 3 star reviews: 0
Total 2 star reviews: 0
Total 1 star reviews: 0
100%would recommend this product
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3 reviews
  • KJ
    Kelsey J.
    Verified Buyer
    Reviewing
    VITAMIN D3 + K2 ORAL SPRAY
    I recommend this product
    Rated 5 out of 5 stars
    4 hours ago
    Love the flavour

    Delivered quickly; has a good amount of vitamin D and a lovely orange flavour (reminds me of Terry's Chocolate Orange! 😍). Nice work, Kollo. I'll be switching to the 3-month sub for my next order

  • R
    Rebecca
    Verified Buyer
    Reviewing
    VITAMIN D3 + K2 ORAL SPRAY
    I recommend this product
    Rated 5 out of 5 stars
    5 hours ago
    Great taste!

    I’ve never come across a flavoured vitamin D spray before. I love it! So convenient. Feeling prepared for winter and getting started now! ☀️❄️

  • A
    Agnieska
    Reviewing
    VITAMIN D3 + K2 ORAL SPRAY
    I recommend this product
    Rated 5 out of 5 stars
    5 hours ago
    10/10

    I moved from bare biology to this one, and I love it — tasty and does what we need!