Is milk thistle profitable to sell on Amazon United Kingdom?

The niche generates £1.8M/yr across 14 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +8.3%. Flapen's verdict: Launch it (57/100).

How competitive is the milk thistle niche?

13 brands and 29 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in milk thistle?

Top complaints mined from reviews: Functionality-Overall, Dosage, Advertised Vs Actual Product. The return rate is 0.0%.

When does demand for milk thistle peak?

Demand peaks in May; the busiest month runs 1.4× the quietest.

What does it cost to enter the milk thistle niche?

Listings span £5.48–£20.91; the average listing price is £12.08 (sweet spot $15–$100). The average incumbent carries 667 reviews — the moat a new listing must climb.

milk thistle

Launch it

A $1.8M/yr market growing +8.3% this quarter with returns at 0.0% — clears our launch bar.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible15.2%

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

Market size

Great£1.8M

£1.8M/yr · 972K searches

Review moat

Good667.21

avg incumbent reviews — the moat a new listing must climb

Avg price

Good£12.08

avg listing price — sweet spot $15–$100

Brand share

Okay82%

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

Price range

Okay£5.48–£20.91

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

Growth

Okay+8.3%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Bad76%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United Kingdom niche tracking, milk thistle is a £1.8M/yr Amazon United Kingdom market (972K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in May. Verdict: Launch it — 57/100.

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

milk thistle market data

Units sold / yr: 125K–150K; avg 8,000–10,000/product
Revenue / yr: £1.5M–£1.8M; units × avg price
Conversion rate: 15.2%
Avg BSR: #27
Page quality: 0%
Prime: 93%
Sponsored: 86%
Out of stock: 8.2%
Avg brand age: 46 months
Avg seller age: 172 days

Competition & brand share

The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.

Brands

13 rising

Sellers

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

12%

EVO NUTRITION33%
Nutrition Geeks23%
MANTRPHIL13%
Horbäach7%
nutribo6%
WeightWorld6%
Open — no brand owns it (7 brands, 12%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.3% search growth over the last 90 days.

Peak months: May · busiest ÷ quietest = 1.4×

Open Trend

Top milk thistle search terms

milk thistle645K/yr -1.8%12.9% conv.
milk thistle high strength142K/yr +54.0%15.1% conv.
milk thistle liver detox29K/yr +78.0%11.4% conv.
milk thistle tablets36K/yr -31.2%10.6% conv.
uvora milk thistle high strength8K/yr +229.1%7.1% conv.
milk thistle herbal supplements20K/yr -24.6%6.9% conv.
uvora milk thistle liver detox3K/yr +888.9%4.6% conv.
silymarin10K/yr +36.6%7.3% conv.
milk thistle capsules10K/yr +63.8%9.0% conv.
thistle10K/yr +0.4%0.7% conv.

All search terms

Top milk thistle 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 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

EVO NUTRITION£6.974.7★2,440 rev

Milk Thistle Tablets 3-in-1 Complex - 120 Tablets (2 Month Supply) - 100mg Extract 80% Silymarin with Artichoke & Dandelion Leaf (Not Milk Thistle Capsules or Tincture) - Vegan - UK Made Supplement

Nutrition Geeks£6.264.5★323 rev

MANTRPHIL£11.484.7★60 rev

EVO NUTRITION£8.214.7★481 rev

Horbäach£5.484.5★537 rev

Newest

by launch date

Milk Thistle High Strength 10000mg - 400mg Silymarin per Capsule - 120 Capsules with Black Pepper Extract - 4 Months Supply - Vegan Herbal Food Supplement

Vinco Supplements£10.1131 rev

2mo ago

MANTRPHIL£11.4860 rev

5mo ago

nutribo£9.51200 rev

7mo ago

Milk Thistle 20 000mg Per Capsule (Maximum Strength) Organic 80% Silymarin Milk Thistle High Strength 60 Vegan Milk Thistle Tablets Capsules Supplement

Insynergy Labs£20.91104 rev

1y ago

Milk Thistle Capsules - 180 Capsules - 6 Months Supply - Just 1 per Day - 80% Silymarin - 40:1 Extract - Vegan & Non-GMO - GMP-Approved Milk Thistle Herbal Supplements

WeightWorld£8.931,989 rev

2y ago

What buyers say about milk thistle

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

What buyers love

Quality-Overall22%

“A great product from a reputable company for my husband”

Value For Money16%

“Good value for money”

Ease Of Chewing/Swallowing7%

“They are a reasonable size so theres no issues swallowing these”

Advertised Vs Actual Product6%

“Actually works”

Ease Of Use5%

“Quick and easy”

Vitamin4%

“will continue to use these as part of our daily vitamins”

Regulates Digestion4%

“Great product easily digested”

Dosage4%

“Good dosage”

Side Effects4%

“It doesnt seem to be harmful either”

Heart Health3%

“They are helping to control my Cholesterol along with a good diet”

What buyers complain about

Functionality-Overall14%

“Seems not to work on me”

Dosage9%

“Unsure of results using 2 tablets a day”

Advertised Vs Actual Product8%

“Doesn't do what it says”

Taste-Overall4%

“have no taste”

Size-Overall4%

“The capsules are quite large”

Pain Relief-Overall3%

“Chest pain”

Ease Of Chewing/Swallowing3%

“Hard to swallow”

Strength2%

“So weak it is worth”

Ingredients-Overall2%

“BATCHES SHOWN TO ONLY HAVE 1% OF CLAIMED INGREDIENTS”

Side Effects2%

“one issue was poor reaction with alcohol so teetotal for a while”

Top return reasons

Side Effects100%

Common questions

Is milk thistle profitable to sell on Amazon United Kingdom?: The niche generates £1.8M/yr across 14 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +8.3%. Flapen's verdict: Launch it (57/100).
How competitive is the milk thistle niche?: 13 brands and 29 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in milk thistle?: Top complaints mined from reviews: Functionality-Overall, Dosage, Advertised Vs Actual Product. The return rate is 0.0%.
When does demand for milk thistle peak?: Demand peaks in May; the busiest month runs 1.4× the quietest.
What does it cost to enter the milk thistle niche?: Listings span £5.48–£20.91; the average listing price is £12.08 (sweet spot $15–$100). The average incumbent carries 667 reviews — the moat a new listing must climb.