vitamin b3
Skip itSoft demand (-17.3% this quarter) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great10.0%search→purchase rate — share of searches ending in a sale
Price range
Good£4.94–£28.85cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.5★avg incumbent rating — lower means beatable quality
Avg price
Okay£11.09avg listing price — sweet spot $15–$100
Review moat
Okay2,849.93avg incumbent reviews — the moat a new listing must climb
Brand share
Okay85%top-5 brand share — brands hold most of the demand
Market size
Okay£139K£139K/yr · 126K searches
Competition
Bad76%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
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.Peak months: Oct · busiest ÷ quietest = 1.7×
Top vitamin b3 search terms
- vitamin b332K/yr
- nicotinamide17K/yr
- vitamin b3 niacinamide12K/yr
- nicotinamide 500mg7K/yr
- b3 vitamin12K/yr
- niacinamide supplement10K/yr
- b3 nicotinamide 500mg7K/yr
- vitamin b3 nicotinamide 500mg3K/yr
- vitamin b3 niacin5K/yr
- vit b33K/yr
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.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Vitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply
Health4All£7.554.4★633 rev
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£8.184.3★414 rev
Nutricost Vitamin B3 Niacinamide 500mg 240 Capsules - Gluten Free Non-GMO Soy Free No Niacin Flush Energy Boost Premium Quality
Nutricost£13.094.6★18,743 rev
Vitamin B3 Nicotinamide (Niacinamide) 500mg No-Flush Niacinamide 90 Vegan Capsules - Resealable and Recyclable Pouch by Alpha01
ALPHA01£4.944.3★214 rev
Vitamin B3 Niacin as Nicotinamide 500mg 180 Capsules 6 Months Supply
Health4All£10.414.5★2,089 rev
Newest
by launch dateVitamin B3 Nicotinamide 500mg | 180 Vegan Capsules | High Strength Vitamin B3 Niacin Supplement (Niacinamide) | Flush Free Formula | Suitable for Vegetarians and Vegans | By Carlyle
Carlyle£8.18414 rev
Vegavero Vitamin B3 Nicotinamide 500 mg | Flush Free Niacinamide | NO Additives Lab-Tested | 180 Capsules | Vegan
Vegavero£13.16713 rev
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£28.85110 rev
Vitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply
Health4All£7.55633 rev
Vitamin B3 Niacin as Nicotinamide 500mg 180 Capsules 6 Months Supply
Health4All£10.412,089 rev
Trending
90-day click momentumVitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply
Health4All£7.554.4★
Vitamin B3 Niacin 500mg | 90 Vegan Capsules (3 Months Supply) | Flush Free Nicotinamide Supplement (Niacinamide) | Resealable & Recyclable Pouch | by Horbaach
Horbäach£7.154.4★
Nutricost Vitamin B3 Niacinamide 500mg 240 Capsules - Gluten Free Non-GMO Soy Free No Niacin Flush Energy Boost Premium Quality
Nutricost£13.094.6★
Vitamin B3 Nicotinamide 500mg 180 Capsules | Flush Free Niacinamide | UK Manufactured | Suitable for Vegans & Vegetarians
Supplement Tree£11.154.5★
Vitamin B3 Nicotinamide (Niacinamide) 500mg No-Flush Niacinamide 90 Vegan Capsules - Resealable and Recyclable Pouch by Alpha01
ALPHA01£4.944.3★
What buyers say about vitamin b3
What buyers praise and complain about, mined from review topics.What buyers love
“Worth every penny”
“Good vitamin”
“Its good produ”
“Item description accuracy”
“Increased energy”
“More energy and feel it's helping my skin”
“Easy to swallow”
“Im really surprised how this has improved my sleep regime, and general health and well being”
“Good tablet size for anyone to take”
“great clean ingredients company”
What buyers complain about
“Confusing? Nicotinamide or Niacin? This says Nicotinamide on the front but Niacin on the back.”
“Very big capsules”
“very low potency”
“Red, itching rash”
“have to say no change at all in skin colour”
“Made me feel ill”
“Hard to swallow”
“Waste of money”
“Also, the dosage is 50% of that previously stated so is confusing”
“Very bitter and hard to swallow”
Top return reasons
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.