Is vitamin b1 profitable to sell on Amazon United Kingdom?

The niche generates £255K/yr across 13 tracked products. 90-day search growth is -6.5%. Flapen's verdict: Skip it (47/100).

How competitive is the vitamin b1 niche?

12 brands and 26 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in vitamin b1?

Top complaints mined from reviews: Smell, Nutritional Content, Advertised Vs Actual Product. The return rate is 0.1%.

When does demand for vitamin b1 peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the vitamin b1 niche?

Listings span £3.78–£16.77; the average listing price is £8.48 (sweet spot $15–$100). The average incumbent carries 937 reviews — the moat a new listing must climb.

vitamin b1

Skip it

Prices mostly outside the sweet spot ($3.78–$16.77) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible15.8%

search→purchase rate — share of searches ending in a sale

Review moat

Good937.08

avg incumbent reviews — the moat a new listing must climb

Market size

Okay£255K

£255K/yr · 191K searches

Brand share

Okay78%

top-5 brand share — brands hold most of the demand

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Avg price

Bad£8.48

avg listing price — sweet spot $15–$100

Growth

Bad-6.5%

90-day search growth — must beat 0% to launch

Competition

Bad76%

top-5 click share — a locked-up shelf

Price range

Bad£3.78–£16.77

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United Kingdom niche tracking, vitamin b1 is a £255K/yr Amazon United Kingdom market (191K searches/yr). The top 5 brands hold 78% of demand. Verdict: Skip it — 47/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

vitamin b1 market data

Units sold / yr: 25K–30K; avg 2,000–2,500/product
Revenue / yr: £212K–£254K; units × avg price
Conversion rate: 15.8%
Avg BSR: #9
Page quality: 0%
Prime: 100%
Sponsored: 85%
Out of stock: 4.1%
Avg brand age: 65 months
Avg seller age: 178 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

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

17%

Natures Aid37%
Lindens14%
NEW LEAF PRODUCTS12%
Solgar9%
MOBU6%
Vita Thrive5%
Open — no brand owns it (6 brands, 17%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -6.5% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top vitamin b1 search terms

vitamin b171K/yr -5.5%12.9% conv.
thiamine37K/yr -14.0%11.7% conv.
thiamine vitamin b1 high strength20K/yr -0.8%16.5% conv.
b1 vitamin10K/yr +2.8%11.1% conv.
vit b17K/yr +11.8%13.0% conv.
vitamin b1 thiamine6K/yr +3.4%12.7% conv.
b1 thiamine4K/yr -10.6%11.0% conv.
thiamine 100mg tablets6K/yr -24.7%20.7% conv.
ttfd thiamine3K/yr -57.8%0.5% conv.

All search terms

Top vitamin b1 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Natures Aid Vitamin B1 100mg Thiamine Tablets High Strength Food Supplement Supports Energy Metabolism Nervous System Heart & Mind Vegan Gluten-Free Non-GMO 90 Tablets

Natures Aid£5.254.6★2,296 rev

Lindens Vitamin B1 Thiamine Tablets - 100 Pack - for Heart Immune and Psychological Function & Energy Release - UK Manufacturer Letterbox Friendly

Lindens£6.074.6★1,438 rev

Vitamin B1 Thiamine Supplement 100mg (4 Months Value Supply) Thiamine Vitamin B1 High Strength Heart Health Healthy Nervous System Immune Health Energy Release Vegan Gluten-Free UK 120 Tablets

NEW LEAF PRODUCTS£7.464.4★843 rev

Solgar Vitamin B1 (Thiamin) 500 mg Tablets - Pack of 100 - Supports Energy Metabolism and Nervous System - Vegan

Solgar£16.774.5★3,551 rev

Vitamin B1 Thiamine 100mg 120 Tablets | Healthy Heart Immune & Psychological Function | Thiamine Hydrochloride High Strength | Vegan | MOBU UK

MOBU£6.564.5★562 rev

Newest

by launch date

Vinco Benfotiamine 300mg - Vitamin B1 Thiamine High Strength for Heart & Kidney Support 120 Vegan Capsules Enhanced Cognitive Function Energy & Antioxidants Gluten & Allergen-Free - Made in UK

Vinco Supplements£13.53313 rev

2y ago

ThiaMax-100 Vitamin B1 Thiamine 100mg Tablets Pack of 100 - for Heart Immune and Psychological Function & Energy Release

PuroSure£4.8743 rev

3y ago

VitaThrive Vitamin B1 100mg Tablets High Strength Thiamine Supplement for Energy Metabolism Nervous System Function & Daily Wellness Support Vegan Tablets 90 Tablets

Vita Thrive£3.78131 rev

4y ago

Vitamin B1 Thiamine 100mg 120 Tablets | Healthy Heart Immune & Psychological Function | Thiamine Hydrochloride High Strength | Vegan | MOBU UK

MOBU£6.56562 rev

5y ago

Vitamin B1 Thiamine 100mg Tablets | 120 Count (4 Months Supply) | High Strength Vitamin B1 | Suitable for Vegetarians and Vegans | by Horbaach

Horbäach£6.46897 rev

5y ago

What buyers say about vitamin b1

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money22%

“Worth every penny”

Advertised Vs Actual Product14%

“as advertised”

Vitamin14%

“Excellent vitamin product”

Quality-Overall13%

“Very pleased with item”

Ease Of Use6%

“Easy to use”

Efficiency4%

“This worked for me”

Size-Overall3%

“they are a good size”

Nutritional Content3%

“Good supplement”

Ease Of Chewing/Swallowing3%

“Easy to swallow”

Functionality-Overall3%

“It will work”

What buyers complain about

Smell21%

“you'll be spending way more on your hot water, soap and deodorant, because your body gets that stink too”

Nutritional Content13%

“poor man's supplement”

Advertised Vs Actual Product10%

“Misleading”

Ingredients-Overall7%

“Not clearly stating ingredients type”

Size-Overall7%

“They're huge”

Stress/Anxiety3%

“I've found from taking these pretty much straight away I could feel the effects I felt karma didn't feel so much on the edge with anxiety plus I like the Fact there's not a lot of ingredients I would give it a 👍🏻 up”

Taste-Overall3%

“bit of an unpleasant taste”

Side Effects3%

“Actually it has given me an upset stomach”

Acid Regulator/Stomach Ache Relief3%