Vitamin D3 + K2 Complex 2000IU
The UK's most popular duo. D3 for immunity and mood; K2 MK-7 to direct calcium to bone, not arteries.
What does optimal health cost per day?
Less than a coffee top-up. Optimal nutrition for 28p/day — the most cost-effective investment in your health.
Free Vitamin C 1000mg with orders over £40
While stocks last · auto-added at checkout
Supply size
Most customers reorder this monthly. Each pack lasts ~30 days.
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Your daily health investment
£0.43
per day
£3.01
per week
£12.99
per month
Less than a daily coffee — for daily nutritional support from Vitamin D3.
Auto-delivered. No minimum term. Cancel any time.
Price locked forever — we never raise your subscription price. Cancel any time, no fees.
Bundle and save up to 20%
Add 2+ products to your stack — discount applied automatically at checkout.
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Only £2.99 — credited toward your first full order
Group buy — save up to 30%
Limited spotsPool orders with other Vitamin buyers. The more people join, the more everyone saves. Next group buy runs when we hit 50 registrations.
📦 What to expect when it arrives
Premium box
Double-sealed. No cheap poly bags — every Medibro order ships in a quality box.
Amber glass
UV-protective amber glass preserves potency. Satisfying click-lid seal.
Little extras
Every first order includes a usage guide and a surprise freebie — see what you get.
Start today
Take your first dose the day it arrives — don't wait for a 'perfect moment'.
Your 30-day journey starts today
Future you will look back on this moment.
Based on typical customer reports. Individual results vary. Backed by our 30-day guarantee.
Premium packaging, inside and out
Amber glass jar
Blocks UV degradation, no plastic leaching
100% recyclable
Jar, cap, and box are fully kerbside recyclable
No artificial fillers
No magnesium stearate, silicon dioxide, or titanium dioxide
- Free UK delivery over £35
- 14-day hassle-free returns
- Secure checkout, audit-logged
- Manually compliance-reviewed
Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
Over 40% of UK adults are vitamin D deficient, especially in autumn and winter. Our D3+K2 Complex pairs cholecalciferol (the most effective form of vitamin D) with menaquinone-7 (MK-7), the most bioavailable form of vitamin K2.
K2 activates Matrix Gla Protein (MGP) and osteocalcin, directing calcium away from arteries and into bone. Without K2, supplemental calcium from D3 can accumulate in the wrong places.
90 capsules = 3 months' supply at 1 per day.
Benefits
- ✓Bone health
- ✓Immune support
- ✓Mood support
- ✓Cardiovascular protection
- ✓Calcium regulation
Dosing Guide
How to take Vitamin D3 + K2 Complex 2000IU
Take 1 softgel daily with your main meal. Contains fat-soluble vitamins — take with a meal containing fat for best absorption.
Always read the label. Consult a healthcare professional if you have any medical conditions or take prescription medication.
Quality & transparency
Why form matters
Medibro uses
D3 + K2 (MK-7 form)
Long-acting MK-7
Others often use
D3 alone or K2 as MK-4
Lower bioavailability
MK-7 has a 72-hour half-life vs. MK-4's 1-hour — meaning it's active in your system all week.
K2 directs calcium to bones rather than arteries. Without K2, high-dose D3 can lead to soft-tissue calcium deposits. MK-7 is the clinically preferred form.
How we compare
Medibro vs. typical high-street / marketplace alternatives
| Feature | Medibro | Others |
|---|---|---|
| Form | D3 + K2 (MK-7) | D3 alone |
| IU per capsule | 4000 IU | 1000 IU |
| K2 for calcium routing | ||
| Olive oil base (fat-soluble) | ||
| Third-party tested | ||
| 30-day guarantee |
NHS recommends vitamin D supplementation
The NHS advises everyone in the UK to consider taking 10mcg vitamin D daily, especially from October to March when sunlight is insufficient.
Source: NHS.uk — Vitamin D
Vitamin D3 is more effective with:
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Your personalised stack
Recommended to pair with Vitamin D3
What to expect over time
Blood serum vitamin D starts climbing. Most people don't notice changes yet — this is normal.
Serotonin synthesis improves with adequate D3. Many users notice improved mood and reduced fatigue.
T-cell activation is D3-dependent. Cold and flu resilience measurably improves.
Bone density, cardiovascular and cognitive benefits accumulate. Annual blood test should show 75–200 nmol/L.
What to expect
A realistic week-by-week guide for first-time users
Blood levels starting to rise. You won't feel anything yet but the deficit is closing.
Serotonin regulation improves as D3 levels normalise. Mood often brightens noticeably.
Full immune priming and bone-density support established. Carry on through winter.
Continued daily use keeps blood levels optimal. Do not stop mid-winter.
Individual results vary. Consistency is key — don't assess before week 6.
Clinical evidence
Peer-reviewed research⏰ How to take for best results
Best time
Morning, with breakfast
Take with
Fat-containing meal — D3 is fat-soluble
Avoid with
Calcium supplements at same time (separate by 4 hours)
K2 (included) directs calcium to bones, not arteries. Essential when taking high-dose D3.
Personalised dose calculator
For guidance only. Consult your pharmacist or GP if you take prescription medication.
Frequently asked questions
Pairs perfectly with
15% off when bought togetherOmega-3 High Strength
Fat-soluble booster
Vitamin D3 is fat-soluble — taking with omega-3 can improve absorption by up to 50%
Bundle total: £37.98 → £32.28
Find your perfect supplement stack
Answer 4 quick questions and get a personalised stack built around your goals, health history, and lifestyle.
Medibro Quality Score™
Independent assessmentPurity
97
Overall
out of 100
Potency
Value
How we compare
Medibro | Budget | Pharmacy | |
|---|---|---|---|
3rd-party COA testing | |||
Premium forms (glycinate, KSM-66, TG omega) | |||
Full ingredient transparency | |||
UK pharmacist reviewed | |||
No proprietary blends | |||
30-day money-back guarantee | |||
Eco-friendly packaging |
Comparison reflects general market observations. Specific brands may vary.
What outcomes matter most to you?
🌍 Ingredient sourcing
Cholecalciferol (D3)
Norway
Lichen-derived, vegan-certified
Menaquinone-7 (K2)
Japan
MK-7 from natto fermentation
UK deficiency data
1 in 5 UK adults are vitamin D deficient — rising to 1 in 3 in winter months
Source: NHS / SACN 2016
Common symptoms
Higher risk if
This information is educational. Always consult your GP before supplementing if you have a health condition.
Founded by a UK pharmacist
“After 12 years dispensing prescriptions, I was frustrated by the gap between expensive supplements and what the evidence actually supports. Medibro was built to source properly — clinical doses, verified purity, fair prices.”
— MPharm, GPhC registered · Medibro founder
Every formula is reviewed by our in-house pharmacy team before launch.
Supplement Interactions
What can I safely combine this with?
K2 directs calcium (mobilised by Vitamin D) to bones and away from arteries. D3+K2 is the gold standard combination.
View Vitamin K2 →Magnesium activates Vitamin D. Most people are deficient in both — supplementing together dramatically improves Vitamin D efficacy.
Omega-3 enhances Vitamin D receptor sensitivity, making the same dose of D3 more effective.
⚕️ Always consult a healthcare professional before combining supplements with medication.
Stack Synergies
Science-backed pairings for better results
Required to activate Vitamin D — without it, up to 50% of D3 stays inactive in the body
Directs calcium deposited by D3 to bones rather than arteries — essential pairing
Fat-soluble co-absorption; omega-3 enhances D3 bioavailability and anti-inflammatory action
Synergies based on published nutritional science. Individual results may vary. Always consult a healthcare professional before combining supplements.
Complete your stack
✨What customers say
From 20 reviews★ 4.8Customers appreciate the effective combination of D3 and K2, noting improvements in mood, energy, bone health, and overall well-being. Many report significant health benefits, including optimal blood test results and enhanced immune function.
Some customers mention the price as a minor drawback, suggesting it could be lower. A few reviews also express a desire for more information on long-term effects or specific health claims.
This product is ideal for UK residents, particularly those with low D3 levels due to limited sunlight exposure, as well as individuals seeking to improve bone health, mood, energy, and immune function.
Customer reviews
- ★★★★★Margaret H.Verified buyer02/04/2026Blood test confirmed improvement
Started this after winter blood test showed severe deficiency. 3-month retest showed optimal levels. The K2 means no worry about arterial calcification.
- ★★★★☆Lucy K.22/03/2026Good quality, easy to take
Tiny softgel, easy to swallow. Noticed improved mood after about 6 weeks which tracks with D3 research. Would give 5 stars if price was slightly lower.
- ★★★★☆Angela F.Verified buyer18/03/2026Good for bone health maintenance
Osteopenia on DEXA scan. GP suggested D3+K2 alongside calcium. Repeat scan in 1 year. Optimistic based on the evidence.
- ★★★★★Frank M.Verified buyer19/02/2026Testosterone improvement
Had low testosterone with concurrent low D3. GP addressed both. D3+K2 alongside testosterone therapy seems to have synergistic benefit.
- ★★★★★Andrew S.Verified buyer02/02/2026Brilliant combined formula
Was buying D3 and K2 separately costing me twice as much. This combined formula saves money and the quality is excellent. Highly recommended.
- ★★★★★Richard B.Verified buyer28/01/2026Mood and energy transformed
Didn't realise how much D3 deficiency was affecting my mood. After 6 weeks on 2000IU the difference is remarkable. Brighter mood, more energy.
- ★★★★★Christine M.10/01/2026Essential for UK residents
UK gets insufficient sun for D3 synthesis for 7 months of the year. Everyone in the UK should take D3+K2. This is the correct form and combination.
- ★★★★★Roy F.Verified buyer07/01/2026Whole family converted
Started this after blood tests showed deficiency. Felt so much better after 6 weeks that I ordered for my wife and teenage children. We are all D3 deficient in the UK. The K2 addition makes this the correct formula.
- ★★★★★Claire W.Verified buyer02/01/2026Essential winter supplement
Living in Scotland, vitamin D is basically mandatory from October. This combined D3+K2 is brilliant — K2 makes sure the calcium goes to your bones not your arteries. Blood test confirmed my levels are now optimal after 3 months.
- ★★★★★Eric W.Verified buyer11/12/20253 year consistent user
Been taking D3+K2 for 3 years. Annual blood tests consistently show optimal D3 levels. No dental cavities for 3 years either (K2 benefit).
- ★★★★★Brian T.02/12/2025Reduced my COVID severity
Caught COVID with optimal D3 levels (tested regularly). Very mild illness. Anecdotal but the D3 research for immune function is solid.
- ★★★★★Michael A.21/11/2025Cognitive function improved
Emerging research on D3 and dementia prevention. Taking this as prophylaxis in my 50s. Already notice sharper cognition.
- ★★★★★Elaine B.Verified buyer17/11/2025Autoimmune symptoms reduced
Hashimotos thyroiditis with low D3 confirmed by blood test. Endocrinologist recommended corrective D3 plus K2. After 4 months antibody levels measurably reduced and fatigue improved. D3 immunomodulation is well-researched.
- ★★★★★Daniel F.Verified buyer17/11/2025Perfect ratio of D3 and K2
So many vitamin D supplements ignore K2. This gets the science right. The 2000IU D3 with MK-7 K2 is the proper evidence-based combination. My GP was pleased with my latest blood results.
- ★★★★★William F.Verified buyer16/11/2025Immune function improved
Used to get several infections per winter. First winter on D3+K2 2000IU — one mild cold lasting 3 days. Anecdotal but convincing.
- ★★★★★Pauline W.Verified buyer14/11/2025My GP now recommends this brand
Showed my GP the formula and he's now recommending this specific brand to other patients. High-quality D3 with the correct MK-7 K2 form.
- ★★★★★Linda K.Verified buyer02/11/2025Seasonal affective disorder improved
Seasonal depression significantly improved. D3 deficiency is directly linked to SAD and this combination with proper dose has made a real difference.
- ★★★★☆Anne P.15/08/2025Good soft gel, easy to take
Small soft gel, no aftertaste. Easy to remember as one capsule daily with breakfast. Good quality D3+K2 combination.
- ★★★★★Steven H.Verified buyer31/07/2025Muscles stronger
Was having muscle weakness and achiness. GP checked and D3 was very low. On this 3 months and muscles feel stronger and less achy.
- ★★★★★Diana N.02/06/2025Children's health improved too
Getting appropriate child formulation for kids after I saw how much benefit I got. D3 deficiency is common in British children.
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