---
title: "Vitamin B3 — £139K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/vitamin-b3"
last_updated: "2026-07-31T13:14:32.410Z"
locale: en
meta:
description: "Niche score 44/100 · £139K/yr market · 126K searches/yr · £11.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £139K/yr market · 126K searches/yr · £11.09 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin B3 — £139K/yr Amazon UK Niche (2026) - Flapen"
---
# **vitamin b3**
**Skip it**
Soft demand (-17.3% this quarter) — this niche doesn't clear our bar today.
Market size 31Growth 16Conversion 87Competition 20Returns 99Price range 58Avg price 42Brand share 33Review moat 37Quality gap 50
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.0%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****£4.94–£28.85**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.5★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Okay****£11.09**
avg listing price — sweet spot $15–$100
**Review moat**
**Okay****2,849.93**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****85%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****£139K**
£139K/yr · 126K searches
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-17.3%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, vitamin b3 is a £139K/yr Amazon United Kingdom market (126K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Oct. Verdict: Skip it — 44/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin b3 market data**
- **Units sold / yr**
- **13K–15K**
- avg 500–750/product
- **Revenue / yr**
- **£139K–£166K**
- units × avg price
- **Conversion rate**
- **10.0%**
- **Avg BSR**
- **#9**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **73%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **53 months**
- **Avg seller age**
- **170 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**12 **▼falling
**Sellers**
**14**
**Top-5 brand share**
**85%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**12%**
- Health4All43% - Carlyle17% - Nutricost12% - ALPHA019% - Horbäach3% - Bettervits3% - Open — no brand owns it (6 brands, 12%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -17.3% search growth over the last 90 days.
4K3KSpike '24Prime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/vitamin-b3/trend)
## **Top vitamin b3 search terms**
- **vitamin b3**32K/yr-13.5%8.1% conv. - **nicotinamide**17K/yr-2.5%6.9% conv. - **vitamin b3 niacinamide**12K/yr-24.0%7.0% conv. - **nicotinamide 500mg**7K/yr+3.9%11.4% conv. - **b3 vitamin**12K/yr-40.3%8.1% conv. - **niacinamide supplement**10K/yr-30.3%6.0% conv. - **b3 nicotinamide 500mg**7K/yr+1.9%12.9% conv. - **vitamin b3 nicotinamide 500mg**3K/yr+33.8%14.4% conv. - **vitamin b3 niacin**5K/yr-47.9%5.3% conv. - **vit b3**3K/yr-14.2%9.0% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/vitamin-b3/search-terms)
## **Top vitamin b3 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%£14K20%£28K30%£42K40%£56K1001K10K100K 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 B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply**Health4All**£7.55**4.4★633 rev](https://www.amazon.co.uk/dp/B0BF4VT816) [2**Vitamin B3 Nicotinamide 500mg | 180 Vegan Capsules | High Strength Vitamin B3 Niacin Supplement (Niacinamide) | Flush Free Formula | Suitable for Vegetarians and Vegans | By Carlyle**Carlyle**£8.18**4.3★414 rev](https://www.amazon.co.uk/dp/B0CWLHPMTT) [3**Nutricost Vitamin B3 Niacinamide 500mg 240 Capsules - Gluten Free Non-GMO Soy Free No Niacin Flush Energy Boost Premium Quality**Nutricost**£13.09**4.6★18,743 rev](https://www.amazon.co.uk/dp/B01M9GIV8S) [4**Vitamin B3 Nicotinamide (Niacinamide) 500mg No-Flush Niacinamide 90 Vegan Capsules - Resealable and Recyclable Pouch by Alpha01**ALPHA01**£4.94**4.3★214 rev](https://www.amazon.co.uk/dp/B09F6L2V5D) [5**Vitamin B3 Niacin as Nicotinamide 500mg 180 Capsules 6 Months Supply**Health4All**£10.41**4.5★2,089 rev](https://www.amazon.co.uk/dp/B00LJWZDJG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Vitamin B3 Nicotinamide 500mg | 180 Vegan Capsules | High Strength Vitamin B3 Niacin Supplement (Niacinamide) | Flush Free Formula | Suitable for Vegetarians and Vegans | By Carlyle**Carlyle**£8.18**414 rev2y ago](https://www.amazon.co.uk/dp/B0CWLHPMTT) [**Vegavero Vitamin B3 Nicotinamide 500 mg | Flush Free Niacinamide | NO Additives Lab-Tested | 180 Capsules | Vegan**Vegavero**£13.16**713 rev3y ago](https://www.amazon.co.uk/dp/B086XBB126) [**Bettervits Niacinamide Complex with Vitamin B3 Niacin Marine Collagen and Hyaluronic Acid High-Strength Niacinamide Supplement for Energy Support Natural Vitamin B3 Boost 60 Capsules**Bettervits**£28.85**110 rev4y ago](https://www.amazon.co.uk/dp/B09W88L1N8) [**Vitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply**Health4All**£7.55**633 rev4y ago](https://www.amazon.co.uk/dp/B0BF4VT816) [**Vitamin B3 Niacin as Nicotinamide 500mg 180 Capsules 6 Months Supply**Health4All**£10.41**2,089 rev4y ago](https://www.amazon.co.uk/dp/B00LJWZDJG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Vitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply**Health4All**£7.55**4.4★**▲ 55%**](https://www.amazon.co.uk/dp/B0BF4VT816) [**Vitamin B3 Niacin 500mg | 90 Vegan Capsules (3 Months Supply) | Flush Free Nicotinamide Supplement (Niacinamide) | Resealable & Recyclable Pouch | by Horbaach**Horbäach**£7.15**4.4★**▲ 47%**](https://www.amazon.co.uk/dp/B094W4C54R) [**Nutricost Vitamin B3 Niacinamide 500mg 240 Capsules - Gluten Free Non-GMO Soy Free No Niacin Flush Energy Boost Premium Quality**Nutricost**£13.09**4.6★**▲ 19%**](https://www.amazon.co.uk/dp/B01M9GIV8S) [**Vitamin B3 Nicotinamide 500mg 180 Capsules | Flush Free Niacinamide | UK Manufactured | Suitable for Vegans & Vegetarians**Supplement Tree**£11.15**4.5★**▲ 11%**](https://www.amazon.co.uk/dp/B07L23JVGM) [**Vitamin B3 Nicotinamide (Niacinamide) 500mg No-Flush Niacinamide 90 Vegan Capsules - Resealable and Recyclable Pouch by Alpha01**ALPHA01**£4.94**4.3★**— 0%**](https://www.amazon.co.uk/dp/B09F6L2V5D)
**~~View all trending →~~**
## **What buyers say about vitamin b3**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**16%
*“Worth every penny”*
**Vitamin**16%
*“Good vitamin”*
**Quality-Overall**15%
*“Its good produ”*
**Advertised Vs Actual Product**15%
*“Item description accuracy”*
**Energy Level**7%
*“Increased energy”*
**Skin Health**5%
*“More energy and feel it's helping my skin”*
**Ease Of Chewing/Swallowing**4%
*“Easy to swallow”*
**Sleep Quality**4%
*“Im really surprised how this has improved my sleep regime, and general health and well being”*
**Size-Overall**3%
*“Good tablet size for anyone to take”*
**Cleansing**2%
*“great clean ingredients company”*
### **What buyers complain about **
**Advertised Vs Actual Product**12%
*“Confusing? Nicotinamide or Niacin? This says Nicotinamide on the front but Niacin on the back.”*
**Size-Overall**12%
*“Very big capsules”*
**Strength**12%
*“very low potency”*
**Allergies**8%
*“Red, itching rash”*
**Color Fading/Discoloration**8%
*“have to say no change at all in skin colour”*
**Pain Relief-Overall**8%
*“Made me feel ill”*
**Ease Of Chewing/Swallowing**8%
*“Hard to swallow”*
**Value For Money**8%
*“Waste of money”*
**Dosage**4%
*“Also, the dosage is 50% of that previously stated so is confusing”*
**Bitter**4%
*“Very bitter and hard to swallow”*
### **Top return reasons **
**Advertised Vs Actual Product**57%
**Ease Of Chewing/Swallowing**29%
**Value For Money**14%
## **Common questions**
- **Is vitamin b3 profitable to sell on Amazon United Kingdom?**
- The niche generates £139K/yr across 15 tracked products. 90-day search growth is -17.3%. Flapen's verdict: Skip it (44/100).
- **How competitive is the vitamin b3 niche?**
- 12 brands and 14 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 85% of demand.
- **What do buyers complain about in vitamin b3?**
- Top complaints mined from reviews: Advertised Vs Actual Product, Size-Overall, Strength. The return rate is 0.1%.
- **When does demand for vitamin b3 peak?**
- Demand peaks in Oct; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the vitamin b3 niche?**
- Listings span £4.94–£28.85; the average listing price is £11.09 (sweet spot $15–$100). The average incumbent carries 2,850 reviews — the moat a new listing must climb.
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