senna
Worth a lookShows searches that convert (25.5% search→purchase), but prices mostly outside the sweet spot ($2.34–$10.29) keeps it on the watch list.
Conversion
Incredible25.5%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Market size
Good£719K£719K/yr · 452K searches
Growth
Good+20.3%90-day search growth — must beat 0% to launch
Review moat
Okay2,123.09avg incumbent reviews — the moat a new listing must climb
Brand share
Okay86%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Avg price
Bad£6.24avg listing price — sweet spot $15–$100
Competition
Bad81%top-5 click share — a locked-up shelf
Price range
Bad£2.34–£10.29cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, senna is a £719K/yr Amazon United Kingdom market (452K searches/yr). The top 5 brands hold 86% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
senna market data
- Units sold / yr
- 125K–150K
- avg 12,500–15,000/product
- Revenue / yr
- £780K–£936K
- units × avg price
- Conversion rate
- 25.5%
- Avg BSR
- #28
- Page quality
- 0%
- Prime
- 91%
- Sponsored
- 91%
- Out of stock
- 10.5%
- Avg brand age
- 60 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 rising
Sellers
73
Top-5 brand share
86%
Top 20: 100%
Top-5 click share
81%
Top 20: 100%
Open market
10%
- Senokot61%
- Dulcolax7%
- Healthpoint7%
- Sennaveda6%
- Wilosc5%
- BECKYS CHOICE4%
- Open — no brand owns it (4 brands, 10%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +20.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top senna search terms
- senna tablets138K/yr
- senna92K/yr
- senokot71K/yr
- senokot max strength56K/yr
- senokot tablets34K/yr
- senna tablets for constipation27K/yr
- senokot max strength 48 tablets adult13K/yr
- senna max strength 48 tablets7K/yr
- senokot laxative tablets5K/yr
- senakot4K/yr
Top senna 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Senokot 7.5mg 20 Tablets - Natural Senna Fruit Laxative for Constipation Relief Constipation relief for adults Dual action laxative Double action constipation relief Effective Overnight
Senokot£3.224.4★2,340 rev
Senokot Strength Max Tablets Adults Senna Fruit 10 Count Constipation Relief for Adults Dual Action Laxative Double Action Constipation Relief Effective Overnight
Senokot£3.044.4★3,048 rev
Dulcolax Adult - Constipation Relief Laxative 5mg Bisacodyl Gastro Resistant Tablets Tablets 20 Count
Dulcolax£2.344.5★16,153 rev
HEALTHPOINT SENNA PODS TABLETS 7.5MG 03/23
Healthpoint£2.474.6★729 rev
Sennaveda Senna Tablets 240 nos Made with Senna Leaf Powder Digestive Health Detox Cleanse Senna Leaf Powder Tablet
Sennaveda£10.294.6★302 rev
Newest
by launch date
Senna Constipation Relief 7.5mg Tablet Adult -3 Pack Tablets Effective Adult Relief - Fylde Clinic
Fylde Clinic£5.8812 rev
Constipation Relief 7.5mg Tablets Adult (5 Packs - 20 Tabs Each)
BECKYS CHOICE£8.1045 rev
4 x Senna 7.5mg 20 Tablets - Constipation Relief (Four Packs) Effective Overnight Constipation Relief Natural & Stool Softener for Adults Supports Digestion Eases Nausea
APG Healthcare£7.49190 rev
Constipation Relief for Adults x 80 Tablets Including Handy Wilosc Constipation Management Chart for Long Term Management.
Wilosc£9.5666 rev
Senna 7.5mg Tablets for Adults 20 Tablets with TDY Guide
TDY Store£7.69223 rev
Trending
90-day click momentumConstipation Relief for Adults x 80 Tablets Including Handy Wilosc Constipation Management Chart for Long Term Management.
Wilosc£9.564.7★
Constipation Relief 7.5mg Tablets Adult (5 Packs - 20 Tabs Each)
BECKYS CHOICE£8.104.4★
Senna Constipation Relief 7.5mg Tablet Adult -3 Pack Tablets Effective Adult Relief - Fylde Clinic
Fylde Clinic£5.884.9★
Senokot 7.5mg 20 Tablets - Natural Senna Fruit Laxative for Constipation Relief Constipation relief for adults Dual action laxative Double action constipation relief Effective Overnight
Senokot£3.224.4★
Dulcolax Adult - Constipation Relief Laxative 5mg Bisacodyl Gastro Resistant Tablets Tablets 20 Count
Dulcolax£2.344.5★
What buyers say about senna
What buyers praise and complain about, mined from review topics.What buyers love
“As advertised great”
“Works perfectly”
“A trusted and reliable product that does exactly what it says”
“not expensive”
“Really helps with bloating”
“Easy to use”
“Consistency – solid tablets”
“Very gentle”
“gentle on the stomach”
“do the job”
What buyers complain about
“this type of reiief does not work”
“had really bad stomach cramps”
“The cramps are painful”
“I had very severe stomach cramps with excruciating pain lasting for about two hours”
“foolishly took 2, next day”
“Doesn't taste of anything”
“Cheap”
“Only downside is the cramps they are very very intense”
“Uncomfortable problem to have”
“Waste of money”
Common questions
- Is senna profitable to sell on Amazon United Kingdom?
- The niche generates £719K/yr across 11 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +20.3%. Flapen's verdict: Worth a look (50/100).
- How competitive is the senna niche?
- 10 brands and 73 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 86% of demand.
- What do buyers complain about in senna?
- Top complaints mined from reviews: Functionality-Overall, Acid Regulator/Stomach Ache Relief, Pain Relief-Overall. The return rate is 0.0%.
- When does demand for senna peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the senna niche?
- Listings span £2.34–£10.29; the average listing price is £6.24 (sweet spot $15–$100). The average incumbent carries 2,123 reviews — the moat a new listing must climb.