---
title: "Vitamin D3 5000 Iu — £37K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/vitamin-d3-5000-iu"
last_updated: "2026-07-31T18:29:05.035Z"
locale: en
meta:
description: "Niche score 36/100 · £37K/yr market · 47K searches/yr · £10.01 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £37K/yr market · 47K searches/yr · £10.01 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin D3 5000 Iu — £37K/yr Amazon UK Niche (2026) - Flapen"
---
# **vitamin d3 5000 iu**
**Skip it**
Soft demand (-37.5% this quarter) — this niche doesn't clear our bar today.
Market size 9Growth 6Conversion 79Competition 32Returns 100Price range 12Avg price 33Brand share 50Review moat 22Quality gap 24
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.9%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****75%**
top-5 brand share — brands hold most of the demand
**Avg price**
**Okay****£10.01**
avg listing price — sweet spot $15–$100
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****8,803.67**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Bad****£6.07–£16.24**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Bad****£37K**
£37K/yr · 47K searches
**Growth**
**Bad****-37.5%**
90-day search growth — must beat 0% to launch
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United Kingdom niche tracking, vitamin d3 5000 iu is a £37K/yr Amazon United Kingdom market (47K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Jan–Feb. Verdict: Skip it — 36/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d3 5000 iu market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **£30K–£40K**
- units × avg price
- **Conversion rate**
- **7.9%**
- **Avg BSR**
- **#108**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **93%**
- **Out of stock**
- **5.9%**
- **Avg brand age**
- **59 months**
- **Avg seller age**
- **168 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▼falling
**Sellers**
**27**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**19%**
- Royal Oak Health33% - Healthy Origins13% - NOW12% - Nutrition Geeks11% - VitaPremium8% - Vitamaze - amazing life6%
## **Demand & seasonality**
Weekly Amazon search volume, last 84 weeks — -37.5% search growth over the last 90 days.
1K750Spike '25Black Friday '25 seasonJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Jan, Feb · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/vitamin-d3-5000-iu/trend)
## **Top vitamin d3 5000 iu search terms**
- **vitamin d3 5000 iu**12K/yr-49.5%7.5% conv. - **vitamin d 5000 iu**8K/yr-15.7%7.0% conv. - **vitamin d 50000 iu tablets**12K/yr-42.6%4.6% conv. - **vitamin d 60000 iu**7K/yr-29.1%1.2% conv. - **vitamin d 5000**5K/yr-36.0%6.7% conv. - **vitamin d high strength 50000 iu tablets**3K/yr-45.3%6.5% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/vitamin-d3-5000-iu/search-terms)
## **Top vitamin d3 5000 iu 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%£4K20%£7K30%£11K40%£15K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Vitamin D3 5000 IU & Vitamin K2 100mcg (MK-7) x120 Capsules - High Strength Vitamin D & K2 Supplement for Men & Women Made in the UK by Royal Oak Health**Royal Oak Health**£12.45**4.7★399 rev](https://www.amazon.co.uk/dp/B0CVNDBY7P) [2**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) [3**Healthy Origins High Strength Vitamin D3 5 000 UI Softgel Capsules - Immune Support Optimal Absorption - Year-Round Wellness for Bone Health and Vitality**Healthy Origins**£12.32**4.7★364 rev](https://www.amazon.co.uk/dp/B0BS9S5H1Q) [4**Now Foods Vitamin D3 Depot 5000 IU 1 Capsule Every 5 Days Cholecalciferol from Lanolin 120 Softgels Lab-Tested Gluten-Free Soy-Free GMO-Free**NOW**£12.48**4.5★400 rev](https://www.amazon.co.uk/dp/B0C4LG6RPM) [5**Vitamin D3 K2 (5000 IU Vitamin D3 + Vitamin K2 MK7 100 mcg) Vitamins for Bones Teeth Muscle Function & Immune System. 6 Month Supply High Bioavailability & No Additives. Vitamaze**Vitamaze - amazing life**£11.01**4.6★3,046 rev](https://www.amazon.co.uk/dp/B0BY36P6QK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Vitamin D 4 000 IU Tablets Maximum Strength Vitamin D3 Supplement 365 Easy to Swallow Tablets - Full Year Supply**VitaPremium**£7.40**2,259 rev1y ago](https://www.amazon.co.uk/dp/B0DJDFKXJT) [**Vitamin D3 5000 IU & Vitamin K2 100mcg (MK-7) x120 Capsules - High Strength Vitamin D & K2 Supplement for Men & Women Made in the UK by Royal Oak Health**Royal Oak Health**£12.45**399 rev2y ago](https://www.amazon.co.uk/dp/B0CVNDBY7P) [**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) [**Now Foods Vitamin D3 Depot 5 000IU Cholecalciferol Highly Dosed 1 Capsule Every 5 Days 240 Softgels Lab-Tested Soy Free Gluten Free Non-GMO**NOW**£15.48**400 rev3y ago](https://www.amazon.co.uk/dp/B09XTV989K) [**Now Foods Vitamin D3 Depot 5000 IU 1 Capsule Every 5 Days Cholecalciferol from Lanolin 120 Softgels Lab-Tested Gluten-Free Soy-Free GMO-Free**NOW**£12.48**400 rev3y ago](https://www.amazon.co.uk/dp/B0C4LG6RPM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Vitamin D3 5000iu - 365 Small Easy to Swallow Tablets (1 Year Supply) High Strength Vitamin D Tablets -UK Manufactured by BioPharmX**Biopharm-X**£7.75**4.4★**▲ 182%**](https://www.amazon.co.uk/dp/B07N7C1XVF) [**Vitamin D 4 000 IU Tablets Maximum Strength Vitamin D3 Supplement 365 Easy to Swallow Tablets - Full Year Supply**VitaPremium**£7.40**4.6★**▲ 55%**](https://www.amazon.co.uk/dp/B0DJDFKXJT) [**Now Foods Vitamin D3 Depot 5000 IU 1 Capsule Every 5 Days Cholecalciferol from Lanolin 120 Softgels Lab-Tested Gluten-Free Soy-Free GMO-Free**NOW**£12.48**4.5★**▲ 55%**](https://www.amazon.co.uk/dp/B0C4LG6RPM) [**Vitamin D3 5000 IU & Vitamin K2 100mcg (MK-7) x120 Capsules - High Strength Vitamin D & K2 Supplement for Men & Women Made in the UK by Royal Oak Health**Royal Oak Health**£12.45**4.7★**▲ 34%**](https://www.amazon.co.uk/dp/B0CVNDBY7P) [**Vitamin D 4 000 IU Gel Capsules High Strength Vitamin D3 Supplement 365 Easy to Swallow Tablets - Full Year Supply**VitaPremium**£6.76**4.7★**▲ 19%**](https://www.amazon.co.uk/dp/B072L235Z5)
**~~View all trending →~~**
## **What buyers say about vitamin d3 5000 iu**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“the capsules feel high quality”*
**Value For Money**18%
*“Excellent Price”*
**Vitamin**16%
*“As described good value vitamins”*
**Ease Of Chewing/Swallowing**11%
*“Small easily swallowed pill”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Ease Of Use**5%
*“Easy and convenient”*
**Dosage**2%
*“Just the right dosage”*
**Side Effects**2%
*“Havent noticed any negative side effects”*
**Size-Overall**1%
*“just the right size”*
**Immunity Booster**1%
*“Immune system support”*
### **What buyers complain about **
**Dosage**12%
*“Not accurate dosage”*
**Size-Overall**10%
*“Large capsules”*
**Vitamin**10%
*“my vitamin D levels were low”*
**Taste-Overall**6%
*“Doesn't taste of anything”*
**Functionality-Overall**4%
*“Doesn't seem to work”*
**Ingredients-Overall**4%
*“This is a rubbish supplement with lots of chemicals”*
**Value For Money**4%
*“Cheap for a reason”*
**Advertised Vs Actual Product**3%
*“Really clever deceptive marketing”*
**Quality-Overall**3%
*“Weak Product”*
**Nutritional Content**3%
*“do not purchase from nutrition geeks”*
### **Top return reasons **
**Vitamin**100%
## **Common questions**
- **Is vitamin d3 5000 iu profitable to sell on Amazon United Kingdom?**
- The niche generates £37K/yr across 15 tracked products. 90-day search growth is -37.5%. Flapen's verdict: Skip it (36/100).
- **How competitive is the vitamin d3 5000 iu niche?**
- 12 brands and 27 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in vitamin d3 5000 iu?**
- Top complaints mined from reviews: Dosage, Size-Overall, Vitamin. The return rate is 0.1%.
- **When does demand for vitamin d3 5000 iu peak?**
- Demand peaks in Jan–Feb; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the vitamin d3 5000 iu niche?**
- Listings span £6.07–£16.24; the average listing price is £10.01 (sweet spot $15–$100). The average incumbent carries 8,804 reviews — the moat a new listing must climb.
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