---
title: "Vitamin D 1000iu — £220K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/vitamin-d-1000iu"
last_updated: "2026-07-31T16:26:54.529Z"
locale: en
meta:
description: "Niche score 36/100 · £220K/yr market · 178K searches/yr · £6.05 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £220K/yr market · 178K searches/yr · £6.05 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin D 1000iu — £220K/yr Amazon UK Niche (2026) - Flapen"
---
# **vitamin d 1000iu**
**Skip it**
Prices mostly outside the sweet spot ($3.13–$10.36) — this niche doesn't clear our bar today.
Market size 42Growth 2Conversion 100Competition 13Returns 100Price range 0Avg price 17Brand share 34Review moat 24Quality gap 21
**Conversion**
**Incredible****20.4%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Market size**
**Okay****£220K**
£220K/yr · 178K searches
**Brand share**
**Okay****85%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****5,568.82**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Bad****£6.05**
avg listing price — sweet spot $15–$100
**Competition**
**Bad****85%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-46.6%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£3.13–£10.36**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, vitamin d 1000iu is a £220K/yr Amazon United Kingdom market (178K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Jan–Oct. Verdict: Skip it — 36/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d 1000iu market data**
- **Units sold / yr**
- **30K–40K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **£182K–£242K**
- units × avg price
- **Conversion rate**
- **20.4%**
- **Avg BSR**
- **#70**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **91%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **70 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▲rising
**Sellers**
**66**
**Top-5 brand share**
**85%**
Top 20: 100%
**Top-5 click share**
**85%**
Top 20: 100%
**Open market**
**11%**
- Vitabiotics Ultra36% - Nutrition Geeks23% - VitaPremium9% - Fultium8% - Incite Nutrition8% - Nu U Nutrition5% - Open — no brand owns it (5 brands, 11%)
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — -46.6% search growth over the last 90 days.
9K7KSpike '24Spike '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Jan, Oct · busiest ÷ quietest = 2.9×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/vitamin-d-1000iu/trend)
## **Top vitamin d 1000iu search terms**
- **vitamin d 1000iu**80K/yr-44.6%18.2% conv. - **vitamin d3 1000 iu**31K/yr-31.3%15.5% conv. - **vitamin d 1000**15K/yr-46.5%16.8% conv. - **vitamin d 25mcg/1000iu**6K/yr-18.3%19.1% conv. - **vitamin d tablets 1000iu**8K/yr-49.6%20.2% conv. - **vitamin d 1000 iu**8K/yr-60.7%17.9% conv. - **vitamin d3 1000iu**7K/yr-65.1%12.8% conv. - **vit d 1000iu**5K/yr-45.8%16.5% conv. - **vitamin d 25mcg**3K/yr-26.4%19.7% conv. - **ultra vitamin d 1000iu**4K/yr-55.6%36.8% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/vitamin-d-1000iu/search-terms)
## **Top vitamin d 1000iu 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%10%£22K20%£44K30%£66K40%£88K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Vitamin D Tablets 1000IU Vitabiotics Ultra**Vitabiotics Ultra**£3.13**4.7★25,174 rev](https://www.amazon.co.uk/dp/B003VQZC3U) [2**Vitamin D 1000iu - 1 Year Supply 365 Easy-Swallow Vitamin D Tablets Vegetarian D3 High Strength Immune Support Supplement - Awarded by The Independent UK**Nutrition Geeks**£5.75**4.6★6,925 rev](https://www.amazon.co.uk/dp/B08F5GBD9X) [3**Vitamin D 1 000 IU Optimal Strength Vitamin D3 Supplement 365 Easy to Swallow Softgels - Full Year Supply**VitaPremium**£7.88**4.7★656 rev](https://www.amazon.co.uk/dp/B09XN9ZQ5Z) [4**Fultium Vitamin D3 1000 IU (25g) Immune Bone & Muscle Support | High Strength | 90 Tablets | Daily Enhanced | From the UKs No.1 Vitamin D Prescription Brand | Vegetarian NonGMO | Food Supplement**Fultium**£3.37**4.6★56 rev](https://www.amazon.co.uk/dp/B0GH7FV3VB) [5**Vitamin D 1000iu - 1+ Year Supply - High Strength 400 Easy Swallow Tablets - One a Day High Strength Cholecalciferol VIT D3 - Vegetarian Supplement - Microtablets - Made in UK**Incite Nutrition**£7.11**4.6★6,903 rev](https://www.amazon.co.uk/dp/B07442P34Y)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fultium Vitamin D3 1000 IU (25g) Immune Bone & Muscle Support | High Strength | 90 Tablets | Daily Enhanced | From the UKs No.1 Vitamin D Prescription Brand | Vegetarian NonGMO | Food Supplement**Fultium**£3.37**56 rev5mo ago](https://www.amazon.co.uk/dp/B0GH7FV3VB) [**Zipvit Vitamin D 1000IU 1 Year Supply 365 Vegetarian D3 Tablets High Absorption Easy-to-Swallow Vitamin D Tablets for Immune Bone & Muscle Health**Zipvit**£6.10**85 rev1y ago](https://www.amazon.co.uk/dp/B0051D461A) [**Vitamin D3 1000iu - 1 Year Supply 365 Easy-Swallow VIT D Tablets Vegetarian Optimal Strength Immune Support Supplement**Right Choice Supplements**£3.49**858 rev3y ago](https://www.amazon.co.uk/dp/B0C2FCX7DB) [**Vitamin D 1 000 IU Optimal Strength Vitamin D3 Supplement 365 Easy to Swallow Softgels - Full Year Supply**VitaPremium**£7.88**656 rev4y ago](https://www.amazon.co.uk/dp/B09XN9ZQ5Z) [**Vitamin D 1000iu - 1+ Year Supply - High Strength 400 Easy Swallow Tablets - One a Day High Strength Cholecalciferol VIT D3 - Vegetarian Supplement - Microtablets - Made in UK**Incite Nutrition**£7.11**6,903 rev5y ago](https://www.amazon.co.uk/dp/B07442P34Y)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fultium Vitamin D3 1000 IU (25g) Immune Bone & Muscle Support | High Strength | 90 Tablets | Daily Enhanced | From the UKs No.1 Vitamin D Prescription Brand | Vegetarian NonGMO | Food Supplement**Fultium**£3.37**4.6★**▲ 252%**](https://www.amazon.co.uk/dp/B0GH7FV3VB) [**Vitamin D 1 000 IU Optimal Strength Vitamin D3 Supplement 365 Easy to Swallow Softgels - Full Year Supply**VitaPremium**£7.88**4.7★**▲ 41%**](https://www.amazon.co.uk/dp/B09XN9ZQ5Z) [**Nutravita Vitamin D 1000 IU (25g) 365 VIT D Softgel Capsules Full Year Supply for Maintenance of Healthy Immune System Muscles Bones & Teeth Vitamin D3 Cholecalciferol Made in The UK**Nutravita**£6.93**4.7★**▲ 21%**](https://www.amazon.co.uk/dp/B06XCY13NT) [**Vitamin D Tablets 1000IU Vitabiotics Ultra**Vitabiotics Ultra**£3.13**4.7★**— 8%**](https://www.amazon.co.uk/dp/B003VQZC3U) [**Vitamin D 1000iu - 1 Year Supply 365 Easy-Swallow Vitamin D Tablets Vegetarian D3 High Strength Immune Support Supplement - Awarded by The Independent UK**Nutrition Geeks**£5.75**4.6★**— 7%**](https://www.amazon.co.uk/dp/B08F5GBD9X)
**~~View all trending →~~**
## **What buyers say about vitamin d 1000iu**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**19%
*“Excellent vitamin D3 supplements”*
**Value For Money**19%
*“Good price”*
**Ease Of Chewing/Swallowing**15%
*“swallow - what a bonus”*
**Quality-Overall**13%
*“Good quality”*
**Advertised Vs Actual Product**5%
*“Does the job”*
**Ease Of Use**3%
*“theyre easy to open”*
**Energy Level**2%
*“They help with energy”*
**Dosage**2%
*“dosage is practical for consistent”*
**Side Effects**1%
*“Amazing, iv been feeling unwell for over 6 month's, feeling dizzy light in my feet weird feeling in my legs,I had test done and had very low vitamin D levels, I brought this product and had this 3 days and I can honestly say the past 3 days iv feel normal again,its got to be this product cud iv had nothing els,and only received this 3 days ago and since then iv felt so good for once,I cant believe it myself,easy to swallow, little tablet and there vegan friendly”*
**Taste-Overall**1%
*“don't taste bad”*
### **What buyers complain about **
**Size-Overall**16%
*“its a small bottle”*
**Dosage**7%
*“High dose”*
**Taste-Overall**7%
*“It doesnt have a funny taste”*
**Vitamin**5%
*“I absolutely do not get enough vitamin D”*
**Strength**3%
*“Welness”*
**Vegan/Organic**2%
*“so it is not suitable for vegetarians or vegans”*
**Ease Of Chewing/Swallowing**1%
*“Pill size is very tinny east to swallow”*
**Energy Level**1%
*“They honestly didn't make a difference for me energy, bone wise”*
**Magnesium**1%
*“there just enough magnesium in each serving even after your take the recommended dose”*
**Absorbency**1%
*“your body will not absorb the amount you think it is in the daily dose”*
## **Common questions**
- **Is vitamin d 1000iu profitable to sell on Amazon United Kingdom?**
- The niche generates £220K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -46.6%. Flapen's verdict: Skip it (36/100).
- **How competitive is the vitamin d 1000iu niche?**
- 11 brands and 66 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 85% of demand.
- **What do buyers complain about in vitamin d 1000iu?**
- Top complaints mined from reviews: Size-Overall, Dosage, Taste-Overall. The return rate is 0.1%.
- **When does demand for vitamin d 1000iu peak?**
- Demand peaks in Jan–Oct; the busiest month runs 2.9× the quietest.
- **What does it cost to enter the vitamin d 1000iu niche?**
- Listings span £3.13–£10.36; the average listing price is £6.05 (sweet spot $15–$100). The average incumbent carries 5,569 reviews — the moat a new listing must climb.
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