niacin
Skip itA small market ($47K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great9.2%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Price range
Good£4.23–£26.71cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay1,796.77avg incumbent reviews — the moat a new listing must climb
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Avg price
Okay£11.20avg listing price — sweet spot $15–$100
Competition
Bad75%top-5 click share — a locked-up shelf
Growth
Bad-17.4%90-day search growth — must beat 0% to launch
Market size
Bad£47K£47K/yr · 46K searches
According to Flapen's Amazon United Kingdom niche tracking, niacin is a £47K/yr Amazon United Kingdom market (46K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Aug–Sep–Oct–Nov. Verdict: Skip it — 43/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
niacin market data
- Units sold / yr
- 4K–5K
- avg 250–500/product
- Revenue / yr
- £45K–£56K
- units × avg price
- Conversion rate
- 9.2%
- Avg BSR
- #29
- Page quality
- 0%
- Prime
- 92%
- Sponsored
- 77%
- Out of stock
- 0.0%
- Avg brand age
- 54 months
- Avg seller age
- 165 days
Competition & brand share
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
11 flat
Sellers
14
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
75%
Top 20: 100%
Open market
14%
- Horbäach27%
- MOBU23%
- Bio Mirco11%
- Health4All11%
- NutriVolv8%
- Nutricost7%
- Open — no brand owns it (5 brands, 14%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -17.4% search growth over the last 90 days.Peak months: Aug, Sep, Oct, Nov · busiest ÷ quietest = 2.2×
Top niacin search terms
- niacin36K/yr
- nicotinic acid5K/yr
- niacin flush3K/yr
- niacin b32K/yr
Top niacin 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Vitamin B3 Niacin 500mg | 90 Vegan Capsules (3 Months Supply) | Flush Free Nicotinamide Supplement (Niacinamide) | Resealable & Recyclable Pouch | by Horbaach
Horbäach£7.154.4★829 rev
Niacin 50mg 120 Tablets | Vitamin B3 Nicotinic Acid Flush Formula | Vegan UK Made | GMP Approved | MOBU (120)
MOBU£7.384.3★454 rev
Niacin Supplements with Flush Effect B3 Vitamin Supplement Nicotinic Acid B1 Thiamine ALA 120 Capsules Cognitive Function Cholesterol Heart & Energy 50mg Active Form (niacinamide alternative)
Bio Mirco£19.184.4★88 rev
Nutrivolv Niacin Supplement Tablets | 100mg | Flush Formula | Pure Nicotinic Acid | Reduces Fatigue | Supports Healthy Cholesterol | Vitamin B3 for Men & Women | Vegan | Halal | Kosher | 120 Tablets
NutriVolv£6.604.2★169 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
Newest
by launch dateNiacin Supplements with Flush Effect B3 Vitamin Supplement Nicotinic Acid B1 Thiamine ALA 120 Capsules Cognitive Function Cholesterol Heart & Energy 50mg Active Form (niacinamide alternative)
Bio Mirco£19.1888 rev
Vitamin B3 Niacinamide 500mg 180 Tablets - High Strength - Suitable for Vegans & Vegetarians - Made in UK
ARC) HEALTH+NUTRITION WWW.ARCHEALTHNUTRITION.CO.UK£8.1212 rev
Vitamin B3 Niacin as Nicotinic Acid 50mg 120 Tablets Flush Effect
Health4All£6.5957 rev
Vitamin B3 Niacin 100ml Liquid Supplements | 100% Pure & Natural Niacin 12.5mg | UK Made & Vegan Friendly | 4 Months Supply | UV Protected Miron Violet Glass | 10 Drops Daily
Epigenetics£20.4655 rev
Niacin 50mg 120 Tablets | Vitamin B3 Nicotinic Acid Flush Formula | Vegan UK Made | GMP Approved | MOBU (120)
MOBU£7.38454 rev
Trending
90-day click momentum
Vitamin B3 Nicotinamide 500mg per Tablet - 180 Tablets - 6 Months Supply
Health4All£7.554.4★
Vitamin B3 Niacinamide 500mg 180 Tablets - High Strength - Suitable for Vegans & Vegetarians - Made in UK
ARC) HEALTH+NUTRITION WWW.ARCHEALTHNUTRITION.CO.UK£8.124.9★
Vitamin B3 Niacin 500mg | 90 Vegan Capsules (3 Months Supply) | Flush Free Nicotinamide Supplement (Niacinamide) | Resealable & Recyclable Pouch | by Horbaach
Horbäach£7.154.4★
Vitamin B3 Niacin as Nicotinic Acid 50mg 120 Tablets Flush Effect
Health4All£6.594.3★
Nutricost Vitamin B3 Niacinamide 500mg 240 Capsules - Gluten Free Non-GMO Soy Free No Niacin Flush Energy Boost Premium Quality
Nutricost£13.094.6★
What buyers say about niacin
What buyers praise and complain about, mined from review topics.What buyers love
“Bottles decent quality too — that Miron glass does feel like itll keep things fresh”
“Good price”
“Healthy vitamin”
“Item description accuracy”
“my energy levels seem to have improved”
“easy to use”
“Easy to swallow or chew or even let the tablet dissolve in your mouth”
“Great for blood flow”
“Its very easy to use with the glass pipette, making dosing simple and mess-free”
“The quality of the ingredients is excellent”
What buyers complain about
“There was I trying to work out what the hell Im suddenly allergic to”
“Inconsistent Dose per tablet”
“Some tablets do nothing whilst others provide a very gentle effect”
“Too big”
“have to say no change at all in skin colour”
“Flush Effect can catch you out”
“Tasteless”
“Very bitter and hard to swallow”
“I always take following a meal as taking these on an empty stomach is a bad idea”
“Hard to swallow”
Top return reasons
Common questions
- Is niacin profitable to sell on Amazon United Kingdom?
- The niche generates £47K/yr across 13 tracked products. 90-day search growth is -17.4%. Flapen's verdict: Skip it (43/100).
- How competitive is the niacin niche?
- 11 brands and 14 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 79% of demand.
- What do buyers complain about in niacin?
- Top complaints mined from reviews: Allergies, Dosage, Side Effects. The return rate is 0.1%.
- When does demand for niacin peak?
- Demand peaks in Aug–Sep–Oct–Nov; the busiest month runs 2.2× the quietest.
- What does it cost to enter the niacin niche?
- Listings span £4.23–£26.71; the average listing price is £11.20 (sweet spot $15–$100). The average incumbent carries 1,797 reviews — the moat a new listing must climb.