Milk Thistle
Launch itA $10.4M/yr market growing +22.5% this quarter with returns at 0.0% — clears our launch bar.
Market size
Incredible$10.4M$10.4M/yr · 4.3M searches
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Great11.2%search→purchase rate — share of searches ending in a sale
Avg price
Great$21.72avg listing price — sweet spot $15–$100
Price range
Great$8.99–$47.21cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Good+22.5%90-day search growth — must beat 0% to launch
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Competition
Okay68%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad10,690.59avg incumbent reviews — the moat a new listing must climb
Is milk thistle profitable on Amazon?
According to Flapen's Amazon United States niche tracking, milk thistle is a $10.4M/yr Amazon United States market (4.3M searches/yr). The top 5 brands hold 83% of demand. Verdict: Launch it — 62/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
milk thistle market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 500K–600K
- avg 30,000–40,000/product
- Revenue / yr
- $10.9M–$13.0M
- units × avg price
- Conversion rate
- 11.2%
- Avg BSR
- #99
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 82%
- Out of stock
- 1.0%
- Avg brand age
- 63 months
- Avg seller age
- 149 days
Competition: brands, sellers & click share
The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.Brands
13 rising
Sellers
68
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
68%
Top 20: 100%
Open market
14%
- Bronson38%
- Zazzee12%
- Nutricost12%
- OxyEnergy11%
- Nature's Bounty10%
- FarmHaven3%
- Open — no brand owns it (7 brands, 14%)
milk thistle demand & seasonality
Weekly Amazon search volume, last 104 weeks — +22.5% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top milk thistle search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- milk thistle2.4M/yr
- milk thistle supplement833K/yr
- milk thistle liver detox383K/yr
- cardo mariano242K/yr
- cardo mariano para el hgado graso118K/yr
- milk thistle extract77K/yr
- thistle31K/yr
- cardo mariano organico34K/yr
- milk thistle and dandelion root13K/yr
- milk thistle 1000mg16K/yr
Top milk thistle products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bronson Milk Thistle Silymarin Marianum & Dandelion Extract 120 Capsules
Bronson$9.904.7★40,242 rev
Nutricost Milk Thistle Extract 240 Capsules for 240 Servings Per Bottle - Vegan GMO Free and Gluten Free
Nutricost$13.714.8★4,949 rev
OxyEnergy Milk Thistle Liver Support Supplement 90 Vegetarian Capsules
OxyEnergy$27.294.3★2,366 rev
Zazzee USDA Organic Milk Thistle 50:1 Extract 80% Silymarin Flavonoids 200 Vegan Capsules 6+ Month Supply Silybum Marianum Liver Support & Detox Support Organic All-Natural Non-GMO Made in USA
Zazzee$37.094.8★1,965 rev
Natures Bounty Milk Thistle 1000mg Herbal Health Supplement Daily Supplement Gluten Free Rapid Release Softgels 50 Ct
Nature's Bounty$9.774.7★10,062 rev
Newest
by launch date
Micro Ingredients Milk Thistle Supplement | 360 Softgels with Grape Seed Oil | Highly Bioavailable Extract | Contains Active Silymarin + Antioxidants
Micro Ingredients$18.63402 rev
Cardo Mariano Mexican Herbal Tea - 4 oz (113g) - Authentic 100% Natural Milk Thistle Loose Leaf Tea - Wildcrafted Non-GMO & Caffeine-Free - Traditional Botanical - by BEXPERTSUSA
B-Experts$12.21383 rev
OxyEnergy Milk Thistle Liver Support Supplement 90 Vegetarian Capsules
OxyEnergy$27.292,366 rev
Bronson Milk Thistle Silymarin Marianum & Dandelion Extract 360 Capsules
Bronson$21.7540,242 rev
Bronson Milk Thistle Silymarin Marianum & Dandelion Extract 90 Capsules
Bronson$8.9940,242 rev
Trending
90-day click momentum
THORNE - Milk Thistle Phytosome (Formerly Siliphos) - Botanical Extract Complex for Antioxidant and Liver Support* - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Capsules
THORNE$47.214.8★
Zazzee USDA Organic Milk Thistle 50:1 Extract 80% Silymarin Flavonoids 200 Vegan Capsules 6+ Month Supply Silybum Marianum Liver Support & Detox Support Organic All-Natural Non-GMO Made in USA
Zazzee$37.094.8★
Clean Nutraceuticals Milk Thistle NAC Chanca Piedra Beet Root Artichoke Astragalus Dandelion Root - Liver Cleanse Detox & Repair Supplement Plus TUDCA Choline & Ginger - 1Pack
Clean Nutraceuticals$26.204.6★
OxyEnergy Milk Thistle Liver Support Supplement 90 Vegetarian Capsules
OxyEnergy$27.294.3★
Micro Ingredients Milk Thistle Supplement | 360 Softgels with Grape Seed Oil | Highly Bioavailable Extract | Contains Active Silymarin + Antioxidants
Micro Ingredients$18.634.7★
What reviews say buyers love and hate about milk thistle
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality and easy to take”
“Very affordable”
“Easy to digest”
“Easy to swallow”
“Good for your heart”
“Effective”
“Outstanding Vitamin”
“Good detox”
“Great effective supplement”
“As advertised”
What buyers complain about
“Does not perform as described”
“Something is wrong with this dosage or ingredient”
“Not worth the side effects”
“false advertising”
“Some people experience mild upset stomach”
“Poor Taste”
“very uncomfortable rash”
“Some weird ingredients in this product: TUDCA (tauroursodeoxycholic acid) is a bile acid, a modified form of ursodeoxycholic acid (UDCA) with taurine attached”
“really bad flair ups with digestive issues I have tried just about everything until I remembered a dear friend of mine that had liver issues had use to take milk thistle so I decided to order a bottle”
“Although this product did not work for me because it was giving me heart burn”
Top return reasons
Common milk thistle questions
- Is milk thistle profitable to sell on Amazon United States?
- The niche generates $10.4M/yr across 17 tracked products. 90-day search growth is +22.5%. Flapen's verdict: Launch it (62/100).
- How competitive is the milk thistle niche?
- 13 brands and 68 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in milk thistle?
- Top complaints mined from reviews: Functionality-Overall, Dosage, Side Effects. The return rate is 0.0%.
- When does demand for milk thistle peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the milk thistle niche?
- Listings span $8.99–$47.21; the average listing price is $21.72 (sweet spot $15–$100). The average incumbent carries 10,691 reviews — the moat a new listing must climb.