Is sulforaphane profitable to sell on Amazon United Kingdom?

The niche generates £62K/yr across 12 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +20.4%. Flapen's verdict: Worth a look (50/100).

How competitive is the sulforaphane niche?

11 brands and 13 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in sulforaphane?

Top complaints mined from reviews: Dosage, Value For Money, Smell. The return rate is 0.1%.

When does demand for sulforaphane peak?

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

What does it cost to enter the sulforaphane niche?

Listings span £8.00–£21.95; the average listing price is £14.26 (sweet spot $15–$100). The average incumbent carries 293 reviews — the moat a new listing must climb.

sulforaphane

Worth a look

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

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great9.4%

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

Review moat

Great293.08

avg incumbent reviews — the moat a new listing must climb

Avg price

Good£14.26

avg listing price — sweet spot $15–$100

Growth

Good+20.4%

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

Price range

Good£8.00–£21.95

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

Brand share

Okay78%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Bad78%

top-5 click share — a locked-up shelf

Market size

Bad£62K

£62K/yr · 47K searches

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.

Data updated Jul 24, 2026 · scored weekly · How we score niches

sulforaphane market data

Units sold / yr: 4K–5K; avg 250–500/product
Revenue / yr: £57K–£71K; units × avg price
Conversion rate: 9.4%
Avg BSR: #1,428
Page quality: 0%
Prime: 100%
Sponsored: 75%
Out of stock: 7.0%
Avg brand age: 49 months
Avg seller age: 187 days

Competition & brand share

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

Brands

11 rising

Sellers

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%)

Demand & seasonality

Weekly Amazon search volume, last 70 weeks — +20.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top sulforaphane search terms

sulforaphane28K/yr +11.5%7.9% conv.
broccoli sprout extract9K/yr +74.3%11.1% conv.
sulforaphane supplement10K/yr +5.6%7.7% conv.

All search terms

Top sulforaphane 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 12 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

SMNutrition£21.954.4★1,723 rev

Organic Broccoli Sprout Extract 21 000mg - 90 Vegan Capsules - High Strength 15:1 Brassica Oleracea Supplement Extract - Resealable and Recyclable Pouch - By Alpha01

ALPHA01£8.094.4★145 rev

Broccoli Sprout Extract 18 000mg | Activated Sulforaphane Supplement | 60 Vegan Capsules | High Strength | by Horbaach

Horbäach£8.234.4★197 rev

LOVE LIFE SUPPLEMENTS£19.334.5★963 rev

Swanson Broccoli Sprout Extract with Sulforaphane 60 Vegan Capsules high Strength Vegetarian Soy Free Gluten Free Non-GMO

Swanson£8.524.5★158 rev

Newest

by launch date

760mg Broccoli Extract 64mg Glucoraphanin Sulforaphane & Myrosinase Full-Spectrum Long-Lasting Antioxidant Properties SanBroc Stomach Acid-Resistant Vegan Supplement (60 Capsules)

Time Health£19.3621 rev

4mo ago

Broccoli Sprout Extract 15 000mg - 7500mcg Sulphoraphane 60 Vegan Capsules

Health4All£8.1224 rev

1y ago

Youthful Roots Sulforaphane Supplement Gummies | Broccoli Sprout Extract with 34.5mg Glucoraphanin Antioxidant Multivitamin A to K Zinc | 90 Gummies with Strawberry Flavour | Immune & Mood Support

Youthful Roots£16.2726 rev

1y ago

450MG Liposomal Sulforaphane Activated Sulforaphane Supplement from Broccoli Sprouts Seed Extract Plus Myrosinase Cellular Level 60 Count (Pack of 1)

Lumarejebo£12.99139 rev

2y ago

Swanson Broccoli Sprout Extract with Sulforaphane 60 Vegan Capsules high Strength Vegetarian Soy Free Gluten Free Non-GMO

Swanson£8.52158 rev

4y ago

What buyers say about sulforaphane

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

What buyers love

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”

Ease Of Use7%

“Easy to use”

Nutritional Content5%

“I was looking for something convenient to help support my overall nutrition”

Vegan/Organic4%

“A vegan friendly supplement”

Advertised Vs Actual Product3%

“as described”

Efficiency3%

“Works well”

What buyers complain about

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”

Regulates Digestion8%

“Had digestive issues with this so I did regret buying it”

Breathability2%

“This product game me the most horrendous bloating”

Vitamin2%

“All supplements vary”

Side Effects2%

“Shame I'm not able to stand another day of tgis to feel other benefits”

Acid Regulator/Stomach Ache Relief2%

“Caused terrible bloating and wind”

Common questions

Is sulforaphane profitable to sell on Amazon United Kingdom?: The niche generates £62K/yr across 12 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +20.4%. Flapen's verdict: Worth a look (50/100).
How competitive is the sulforaphane niche?: 11 brands and 13 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 78% of demand.
What do buyers complain about in sulforaphane?: Top complaints mined from reviews: Dosage, Value For Money, Smell. The return rate is 0.1%.
When does demand for sulforaphane peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the sulforaphane niche?: Listings span £8.00–£21.95; the average listing price is £14.26 (sweet spot $15–$100). The average incumbent carries 293 reviews — the moat a new listing must climb.