---
title: "Vitamin D3 K2 — £1.3M/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/vitamin-d3-k2"
last_updated: "2026-07-31T13:26:47.962Z"
locale: en
meta:
description: "Niche score 38/100 · £1.3M/yr market · 1.2M searches/yr · £7.02 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · £1.3M/yr market · 1.2M searches/yr · £7.02 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin D3 K2 — £1.3M/yr Amazon UK Niche (2026) - Flapen"
---
# **vitamin d3 k2**
**Skip it**
A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Market size 83Growth 10Conversion 97Competition 0Returns 100Price range 0Avg price 19Brand share 0Review moat 23Quality gap 25
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****15.8%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Great****£1.3M**
£1.3M/yr · 1.2M searches
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****7,984.8**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£7.02**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-29.2%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****£5.64–£8.40**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, vitamin d3 k2 is a £1.3M/yr Amazon United Kingdom market (1.2M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 38/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d3 k2 market data**
- **Units sold / yr**
- **150K–200K**
- avg 30,000–40,000/product
- **Revenue / yr**
- **£1.1M–£1.4M**
- units × avg price
- **Conversion rate**
- **15.8%**
- **Avg BSR**
- **#8**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▼falling
**Sellers**
**21**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- Nutrition Geeks58% - WeightWorld20% - EVO NUTRITION16% - BetterYou6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -29.2% search growth over the last 90 days.
70K50KSpike '24Spike '25 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/vitamin-d3-k2/trend)
## **Top vitamin d3 k2 search terms**
- **vitamin d3 k2**718K/yr-29.7%11.7% conv. - **d3 and k2 vitamin**145K/yr-21.2%12.2% conv. - **d3 k2**49K/yr-27.0%9.2% conv. - **vit d3 k2**41K/yr-37.0%11.5% conv. - **vitamin d k2**40K/yr-39.2%10.4% conv. - **vitamin d and k2**24K/yr-42.0%9.6% conv. - **nutrition geeks vitamin d**22K/yr-39.2%10.9% conv. - **vitamin d3 and k2**21K/yr-36.5%9.1% conv. - **nutrition geeks vitamin d3 k2**16K/yr-17.9%26.6% conv. - **k2 d3**9K/yr+34.5%11.2% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/vitamin-d3-k2/search-terms)
## **Top vitamin d3 k2 products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%£194K30%£389K45%£583K60%£778K1K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 5 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Vitamin D3 4000 iu & Vitamin K2 MK7 100g - 1 Year Supply 365 Easy-Swallow Vitamin D3 K2 Tablets 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements UK Made Vitamin D Tablets**Nutrition Geeks**£7.95**4.6★17,521 rev](https://www.amazon.co.uk/dp/B0CR57HRDV) [2**Vitamin D3 4000IU & K2 125g (MK7) - 365 VIT D Tablets - 1 Year Supply**WeightWorld**£8.40**4.6★4,958 rev](https://www.amazon.co.uk/dp/B08DG68P6B) [3**Vitamin D3 4000iu & Vitamin K2 100ug (MK7) |180 D K Vegetarian Tablets | 1-A-Day | 6 Month Supply | High Strength | Vitamin D K2 Supplement | Made in the UK | Cholecalciferol & Menaquinone**EVO NUTRITION**£5.67**4.6★8,749 rev](https://www.amazon.co.uk/dp/B08WHK73WM) [4**Vitamin D3 4000iu & Vitamin K2 100ug MK7 | 400 Vegetarian Tablets - 1 Year Supply | Cholecalciferol & Menaquinone | Made in the UK**EVO NUTRITION**£7.46**4.7★2,604 rev](https://www.amazon.co.uk/dp/B09L1C6Y7P) [5**BetterYou Vitamin D3 K2 Oral Spray Fast Acting Vitamin D 3000 IU + Vitamin K2 (MK7) Supplement Supports Bones Teeth Immune System & Blood Clotting 1-Month Supply Natural Peppermint Flavour**BetterYou**£5.64**4.5★6,092 rev](https://www.amazon.co.uk/dp/B007DIJJ0O)
### **Newest**
by launch date
[**Vitamin D3 4000 iu & Vitamin K2 MK7 100g - 1 Year Supply 365 Easy-Swallow Vitamin D3 K2 Tablets 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements UK Made Vitamin D Tablets**Nutrition Geeks**£7.95**17,521 rev2y ago](https://www.amazon.co.uk/dp/B0CR57HRDV) [**Vitamin D3 4000iu & Vitamin K2 100ug MK7 | 400 Vegetarian Tablets - 1 Year Supply | Cholecalciferol & Menaquinone | Made in the UK**EVO NUTRITION**£7.46**2,604 rev4y ago](https://www.amazon.co.uk/dp/B09L1C6Y7P) [**Vitamin D3 4000IU & K2 125g (MK7) - 365 VIT D Tablets - 1 Year Supply**WeightWorld**£8.40**4,958 rev6y ago](https://www.amazon.co.uk/dp/B08DG68P6B) [**Vitamin D3 4000iu & Vitamin K2 100ug (MK7) |180 D K Vegetarian Tablets | 1-A-Day | 6 Month Supply | High Strength | Vitamin D K2 Supplement | Made in the UK | Cholecalciferol & Menaquinone**EVO NUTRITION**£5.67**8,749 rev6y ago](https://www.amazon.co.uk/dp/B08WHK73WM) [**BetterYou Vitamin D3 K2 Oral Spray Fast Acting Vitamin D 3000 IU + Vitamin K2 (MK7) Supplement Supports Bones Teeth Immune System & Blood Clotting 1-Month Supply Natural Peppermint Flavour**BetterYou**£5.64**6,092 rev8y ago](https://www.amazon.co.uk/dp/B007DIJJ0O)
### **Trending**
90-day click momentum
[**Vitamin D3 4000IU & K2 125g (MK7) - 365 VIT D Tablets - 1 Year Supply**WeightWorld**£8.40**4.6★**▲ 73%**](https://www.amazon.co.uk/dp/B08DG68P6B) [**Vitamin D3 4000 iu & Vitamin K2 MK7 100g - 1 Year Supply 365 Easy-Swallow Vitamin D3 K2 Tablets 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements UK Made Vitamin D Tablets**Nutrition Geeks**£7.95**4.6★**— 2%**](https://www.amazon.co.uk/dp/B0CR57HRDV) [**BetterYou Vitamin D3 K2 Oral Spray Fast Acting Vitamin D 3000 IU + Vitamin K2 (MK7) Supplement Supports Bones Teeth Immune System & Blood Clotting 1-Month Supply Natural Peppermint Flavour**BetterYou**£5.64**4.5★**— 10%**](https://www.amazon.co.uk/dp/B007DIJJ0O) [**Vitamin D3 4000iu & Vitamin K2 100ug MK7 | 400 Vegetarian Tablets - 1 Year Supply | Cholecalciferol & Menaquinone | Made in the UK**EVO NUTRITION**£7.46**4.7★**▼ 22%**](https://www.amazon.co.uk/dp/B09L1C6Y7P) [**Vitamin D3 4000iu & Vitamin K2 100ug (MK7) |180 D K Vegetarian Tablets | 1-A-Day | 6 Month Supply | High Strength | Vitamin D K2 Supplement | Made in the UK | Cholecalciferol & Menaquinone**EVO NUTRITION**£5.67**4.6★**▼ 34%**](https://www.amazon.co.uk/dp/B08WHK73WM)
## **What buyers say about vitamin d3 k2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**19%
*“Essential vitamins”*
**Quality-Overall**19%
*“Good quality and easy to swallow”*
**Value For Money**17%
*“Good Price”*
**Ease Of Chewing/Swallowing**9%
*“Perfect for people who struggle to swallow them”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Ease Of Use**5%
*“Easy to use”*
**Side Effects**2%
*“Havent noticed any negative side effects”*
**Taste-Overall**2%
*“no nasty taste or side affects”*
**Dosage**2%
*“Good Dosage”*
**Efficiency**2%
*“Effective”*
### **What buyers complain about **
**Size-Overall**13%
*“Packet is very tiny”*
**Dosage**13%
*“High dose can cause health issues”*
**Vitamin**7%
*“Not the right type of Vitamin D for me I guess”*
**Functionality-Overall**4%
*“Doesn't seem to work”*
**Side Effects**4%
*“Gives me headache”*
**Taste-Overall**4%
*“the spray has a really bad taste”*
**Advertised Vs Actual Product**3%
*“Misleading advertising”*
**Value For Money**3%
*“Cheap for a reason”*
**Nutritional Content**3%
*“do not purchase from nutrition geeks”*
**Ingredients-Overall**3%
*“however I wont repeat order anymore as Ive realised this brand of products contain silicon dioxide”*
### **Top return reasons **
**Vitamin**50%
**Ingredients-Overall**50%
## **Common questions**
- **Is vitamin d3 k2 profitable to sell on Amazon United Kingdom?**
- The niche generates £1.3M/yr across 5 tracked products. 90-day search growth is -29.2%. Flapen's verdict: Skip it (38/100).
- **How competitive is the vitamin d3 k2 niche?**
- 4 brands and 21 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in vitamin d3 k2?**
- Top complaints mined from reviews: Size-Overall, Dosage, Vitamin. The return rate is 0.1%.
- **When does demand for vitamin d3 k2 peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the vitamin d3 k2 niche?**
- Listings span £5.64–£8.40; the average listing price is £7.02 (sweet spot $15–$100). The average incumbent carries 7,985 reviews — the moat a new listing must climb.
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