silymarin
Worth a lookShows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Great$21.19avg listing price — sweet spot $15–$100
Price range
Great$8.99–$43.28cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great8.3%search→purchase rate — share of searches ending in a sale
Market size
Good$563K$563K/yr · 321K searches
Competition
Good48%top-5 click share — leaders hold, buyers still browse
Brand share
Good72%top-5 brand share — brands hold most of the demand
Growth
Okay+14.2%90-day search growth — must beat 0% to launch
Review moat
Bad5,004.8avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, silymarin is a $563K/yr Amazon United States market (321K searches/yr). The top 5 brands hold 72% of demand. Demand peaks in May. Verdict: Worth a look — 60/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
silymarin market data
- Units sold / yr
- 25K–30K
- avg 750–1,000/product
- Revenue / yr
- $530K–$636K
- units × avg price
- Conversion rate
- 8.3%
- Avg BSR
- #183
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 70%
- Out of stock
- 0.5%
- Avg brand age
- 77 months
- Avg seller age
- 154 days
Competition & brand share
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.Brands
17 rising
Sellers
40
Top-5 brand share
72%
Top 20: 100%
Top-5 click share
48%
Top 20: 90%
Open market
20%
- NOW Foods26%
- Zazzee15%
- Pure Encapsulations12%
- Bronson11%
- Life Extension8%
- VITAMISAN7%
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — +14.2% search growth over the last 90 days.Peak months: May · busiest ÷ quietest = 1.6×
Top silymarin search terms
- silymarin69K/yr
- silimarina para el hgado graso45K/yr
- silimarina47K/yr
- silymarin milk thistle21K/yr
- now milk thistle20K/yr
- milk thistle 80 percent silymarin10K/yr
- silymarin supplement22K/yr
- silimarina 1000mg14K/yr
- silymarin complex super liver support6K/yr
- milk thistle silymarin7K/yr
Top silymarin 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
NOW Foods Supplements Silymarin Milk Thistle Extract 300 mg with Artichoke and Dandelion Double Strength Supports Liver Function* 200 Veg Capsules
NOW Foods$21.564.7★6,618 rev

Pure Encapsulations Silymarin - 250 mg Milk Thistle Per Capsule - Liver Health Support* - Antioxidants Supplement - Non-GMO & Vegan - 120 Capsules
Pure Encapsulations$43.284.7★1,225 rev

Bronson Milk Thistle Silymarin Marianum & Dandelion Extract 120 Capsules
Bronson$9.904.7★40,242 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

VITAMISAN Milk Thistle silimarina with Dandelion Fennel. Licorice Artichoke Alfalfa Detox & Cleansing Formula Support Liver 120 Capsules
VITAMISAN$19.134.8★287 rev
Newest
by launch date
NOW Foods Supplements Silymarin Milk Thistle Extract 300 mg with Artichoke and Dandelion Double Strength Supports Liver Function* 250 Veg Capsules
NOW Foods$28.9479 rev

Silimarina con Hinojo en Cpsulas | Suplemento Alimenticio con Antioxidantes | Apoyo para el Bienestar General y el Estilo de Vida Diario | Frmula Herbal | 120 Cpsulas
Generic$20.3793 rev

USDA Organic Milk Thistle Liver Detox Supplement Capsules 80% Silymarin 250 mg 120 Count (2 Month Supply) with Beetroot & Artichoke Extract for Liver Support & Digestion Vegan Non-GMO Made in USA
Garden of Herbz$23.95197 rev

Suplemento Alimenticio con Silimarina Cardo Mariano Diente de Len Hinojo Complejo B y Regaliz | 120 Cpsulas | Frmula Herbal con Antioxidantes para el Bienestar Diario
Generic$20.54101 rev

PURE CO USDA Organic Milk Thistle Capsules - 80% Silymarin Supplement for Liver Support- Super Concentrated 300mg of 30:1 Milk Thistle Extract Liver Detox 120 Day Supply
PURE CO$23.662,183 rev
Trending
90-day click momentum
PURE CO USDA Organic Milk Thistle Capsules - 80% Silymarin Supplement for Liver Support- Super Concentrated 300mg of 30:1 Milk Thistle Extract Liver Detox 120 Day Supply
PURE CO$23.664.7★

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★

NOW Foods Supplements Silymarin Milk Thistle Extract 300 mg with Artichoke and Dandelion Double Strength Supports Liver Function* 50 Veg Capsules
NOW Foods$9.074.7★

Nutricost Milk Thistle Capsules 300mg 120 Capsules (80% Silymarin)
Nutricost$14.644.7★

NOW Foods Supplements Silymarin Milk Thistle Extract 300 mg with Artichoke and Dandelion Double Strength Supports Liver Function* 250 Veg Capsules
NOW Foods$28.944.6★
What buyers say about silymarin
What buyers praise and complain about, mined from review topics.What buyers love
“The bottle is high quality”
“Very affordable”
“Easy to digest”
“Easy to swallow”
“Helping with heart health”
“Effective”
“Outstanding Vitamin”
“Clean ingredients”
“it is organic”
“Easy to use capsules”
What buyers complain about
“Does not perform as described”
“Not worth the side effects”
“Something is wrong with this dosage or ingredient”
“Poor Taste”
“Bad stomach pain”
“false advertising”
“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”
“very uncomfortable rash”
“Poor Quality”
“A little expensive”
Top return reasons
Common questions
- Is silymarin profitable to sell on Amazon United States?
- The niche generates $563K/yr across 30 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +14.2%. Flapen's verdict: Worth a look (60/100).
- How competitive is the silymarin niche?
- 17 brands and 40 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 72% of demand.
- What do buyers complain about in silymarin?
- Top complaints mined from reviews: Functionality-Overall, Side Effects, Dosage. The return rate is 0.0%.
- When does demand for silymarin peak?
- Demand peaks in May; the busiest month runs 1.6× the quietest.
- What does it cost to enter the silymarin niche?
- Listings span $8.99–$43.28; the average listing price is $21.19 (sweet spot $15–$100). The average incumbent carries 5,005 reviews — the moat a new listing must climb.