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Sulforaphane

Sulforaphane shows low returns (0.1%), but a small market ($62K/yr) keeps it on the watch list.

Flapen Score

50
Worth a look
Market size 16Growth 50Conversion 85Competition 18Returns 100Price range 50Avg price 69Brand share 45Review moat 85Quality gap 45
This niche Category average

Is Sulforaphane profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Sulforaphane is a £62K/yr Amazon United Kingdom market (47K searches/yr). The top 5 brands hold 78% of demand. Verdict: Worth a look — 50/100.

Sulforaphane: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved +20.4% over the last 90 days and 9.4% of searches end in a purchase.

£62K

revenue / yr

Units sold / yr5K
Search volume / yr+20.4%47K
Conversion rate9.4%
Avg price£14.26

Who owns the niche?

The top 5 brands hold 78% of demand, so 22% of the market is open.

22%

open market share

Brands · sellers11 · 13
Top-5 product click share78%
Open market22%
Avg brand age49 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 12 products

Sponsored placement75%
New entrants (1y)1· 0 succeeded
Avg rating4.5★
Avg reviews293

Top Sulforaphane products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

£0£6K£12K£19K£25K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

11 rising

Sellers

13

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

17%

  • SMNutrition30%
  • ALPHA0120%
  • Horbäach11%
  • LOVE LIFE SUPPLEMENTS10%
  • Swanson7%
  • ECO-VITS5%
  • Open — no brand owns it (5 brands, 17%)

Sulforaphane demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume47KCVR9.4%Products12Brands11Top 5 Brands78%OOS Rate7.0%Rating4.5★Reviews293Avg BSR#1,428
2K1KSpike '25Spike '26AprMayJunJulAugSepOctNovDecJanFebMarAprMayJun

No pronounced peak months · busiest ÷ quietest = 1.5×

Top Sulforaphane search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • sulforaphane28K/yr
  • broccoli sprout extract9K/yr
  • sulforaphane supplement10K/yr

What reviews say buyers love and hate about Sulforaphane

What buyers mention most, as a share of all reviews.

What buyers love

66% of reviews
Quality-Overall13%

Amazing product, great seller

Vitamin9%

Good supplement for daily wellness

Ingredients-Overall8%

the ingredients are clean

Regulates Digestion8%

Good for digestion

Ease Of Chewing/Swallowing7%

The capsules are easy to take

What buyers complain about

68% of reviews
Dosage17%

They do seem to low dose on the Sulforaphane at about 4mg per capsule

Value For Money10%

They are on the more expensive side of things

Smell9%

Strong smell and quite expensive

Advertised Vs Actual Product9%

MISLEADING HEADLINE

Quality-Overall8%

poor quality vessel

Common Sulforaphane questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Sulforaphane 50/100 on Amazon United Kingdom — Worth a look. The niche generates £62K/yr across 12 tracked products. 0 of 1 products launched in the last 360 days are still selling. Search demand moved +20.4% over the last 90 days.
Search demand for Sulforaphane on Amazon United Kingdom is steady year-round — the busiest month runs 1.5× the quietest.