---
title: "Seaweed Shampoo — £84K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/beauty/seaweed-shampoo"
last_updated: "2026-08-06T05:43:35.653Z"
locale: en
meta:
description: "Niche score 41/100 · £84K/yr market · 282K searches/yr · £12.20 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · £84K/yr market · 282K searches/yr · £12.20 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Seaweed Shampoo — £84K/yr Amazon UK Niche (2026) - Flapen"
---
# **seaweed shampoo**
**Skip it**
A small market ($84K/yr) — this niche doesn't clear our bar today.
Market size 21Growth 24Conversion 31Competition 36Returns 99Price range 37Avg price 52Brand share 30Review moat 25Quality gap 75
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Good****£12.20**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****£4.10–£21.43**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****2.4%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****87%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****4,660.15**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-2.3%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£84K**
£84K/yr · 282K searches
According to Flapen's Amazon United Kingdom niche tracking, seaweed shampoo is a £84K/yr Amazon United Kingdom market (282K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in Jan–Aug–Oct–Nov–Dec. Verdict: Skip it — 41/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **seaweed shampoo market data**
- **Units sold / yr**
- **8K–10K**
- avg 250–500/product
- **Revenue / yr**
- **£98K–£122K**
- units × avg price
- **Conversion rate**
- **2.4%**
- **Avg BSR**
- **#304**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **155 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▼falling
**Sellers**
**65**
**Top-5 brand share**
**87%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**9%**
- Sea Magik51% - FAITH IN NATURE13% - Scottish Fine Soaps10% - SEAWEED ORGANICS9% - Neal's Yard Remedies4% - Method3% - Open — no brand owns it (4 brands, 9%)
## **Demand & seasonality**
Weekly Amazon search volume, last 78 weeks — -2.3% search growth over the last 90 days.
15K10KSpike '25Prime Day '25Spike '26 seasonFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Jan, Aug, Oct, Nov, Dec · busiest ÷ quietest = 4.1×
[**Open Trend **](https://flapen.com/research/uk/beauty/seaweed-shampoo/trend)
## **Top seaweed shampoo search terms**
- **cornish seaweed shampoo and conditioner**85K/yr+32.8%0.9% conv. - **seaweed shampoo**88K/yr-19.1%3.7% conv. - **sea magik**23K/yr-10.1%4.7% conv. - **cornish seaweed shampoo**13K/yr+7.4%1.4% conv. - **seaweed shampoo and conditioner**16K/yr-35.7%3.2% conv. - **the cornish seaweed company shampoo**11K/yr+41.9%0.4% conv. - **cornish seaweed bath company shampoo**19K/yr-33.0%0.3% conv. - **cornish seaweed bath company**8K/yr+18.9%0.1% conv. - **super nutrient shampoo cornish seaweed**5K/yr+12.1%1.4% conv. - **sea magik shampoo and conditioner**6K/yr-52.3%15.1% conv. [**All search terms **](https://flapen.com/research/uk/beauty/seaweed-shampoo/search-terms)
## **Top seaweed shampoo 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.
0%10%£8K20%£17K30%£25K40%£34K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Sea Magik - Seaweed Shampoo and Conditioner Set with Dead Sea Salt and Salicylic Acid to Exfoliate and Cleanse Dry or Sensitive Scalps Gentle Spa Fragrance Vegan Cruelty Free (2 x 300ml)**Sea Magik**£17.86**4.2★353 rev](https://www.amazon.co.uk/dp/B0BL7VDNDG) [2**Sea Magik - Seaweed Shampoo to Soothe Itchy Scalp Psoriasis and Eczema with Hydrating Dead Sea Salt Suitable for All Hair and Scalp Types Vegan and Cruelty Free (300ml)**Sea Magik**£10.68**4.5★208 rev](https://www.amazon.co.uk/dp/B0BL3ZG1WZ) [3**Faith In Nature Natural Seaweed & Citrus Shampoo Detoxifying for Oily Hair & Scalp Vegan & Cruelty Free No SLS Silicones or Parabens 400ml**FAITH IN NATURE**£4.53**4.5★13,596 rev](https://www.amazon.co.uk/dp/B002MMMKMA) [4**Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts**Scottish Fine Soaps**£8.84**4.4★55 rev](https://www.amazon.co.uk/dp/B0DVGHDSTQ) [5**SEAWEED ORGANICS - Seaweed Shampoo Vegan certified Organic Scottish seaweeds Rosemary Vitamin E No SLS or Parabens Submit Cosmetic Product Notification in the UK 250ml DIANA DRUMMOND**SEAWEED ORGANICS**£14.28**3.8★76 rev](https://www.amazon.co.uk/dp/B0CYZYZZ6Z)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Method Daily Shampoo Daily Zen Cucumber Seaweed & Green Tea Scent Sulphate-Free 350ml**Method**£4.10**291 rev11mo ago](https://www.amazon.co.uk/dp/B0FL2FB4HN) [**Sea Magik - Argan Oil Shampoo and Argan Oil Conditioner with Magnesium and Organic Seaweed to Restore Shine Sulphate Free Hydrates Dry Hair and Scalp Vegan Cruelty Free (2 x 300ml)**Sea Magik**£19.04**94 rev11mo ago](https://www.amazon.co.uk/dp/B0FL26DZF6) [**Sea Magik - Seaweed Shampoo and Scalp Mask to Soothe Itchy Sensitive and Dry Scalp or Psoriasis Long Lasting Hydration with Dead Sea Salt Vegan Cruelty Free (150ml and 300ml)**Sea Magik**£18.92**16 rev11mo ago](https://www.amazon.co.uk/dp/B0FL2C9B8N) [**Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts**Scottish Fine Soaps**£8.84**55 rev1y ago](https://www.amazon.co.uk/dp/B0DVGHDSTQ) [**Rosemary Shampoo Conditioner Set Rosemary Hair Growth Oil with Mint Biotin Organic Anti Hair Loss Shampoo Cleanse Moisturize Hair and Keep Scalp Health 3Pcs Set Gifts for Men Women 200ml*2+30ml**SHVYOG**£14.48**568 rev2y ago](https://www.amazon.co.uk/dp/B0D7ZL9T78)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Sea Magik - Seaweed Shampoo and Scalp Mask to Soothe Itchy Sensitive and Dry Scalp or Psoriasis Long Lasting Hydration with Dead Sea Salt Vegan Cruelty Free (150ml and 300ml)**Sea Magik**£18.92**4.1★**▲ 100%**](https://www.amazon.co.uk/dp/B0FL2C9B8N) [**Sea Magik - Scalp Mask for Itchy Sensitive and Dry Scalp and Hair 3 Organic Seaweed with Dead Sea Mud Conditioner with Salicylic Acid Long Lasting Hydration Vegan Cruelty Free (150ml)**Sea Magik**£11.50**4.3★**▲ 58%**](https://www.amazon.co.uk/dp/B08666V8F4) [**Sea Magik - Argan Oil Shampoo and Argan Oil Conditioner with Magnesium and Organic Seaweed to Restore Shine Sulphate Free Hydrates Dry Hair and Scalp Vegan Cruelty Free (2 x 300ml)**Sea Magik**£19.04**4.0★**▲ 53%**](https://www.amazon.co.uk/dp/B0FL26DZF6) [**Method Daily Shampoo Daily Zen Cucumber Seaweed & Green Tea Scent Sulphate-Free 350ml**Method**£4.10**4.4★**▲ 44%**](https://www.amazon.co.uk/dp/B0FL2FB4HN) [**Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts**Scottish Fine Soaps**£8.84**4.4★**▲ 39%**](https://www.amazon.co.uk/dp/B0DVGHDSTQ)
**~~View all trending →~~**
## **What buyers say about seaweed shampoo**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“An effective product”*
**Smell**15%
*“the fragrance is lovely”*
**Hair Growth**15%
*“Grow me hair”*
**Soft Feel**7%
*“very soft”*
**Value For Money**7%
*“Excellent Value”*
**Cleansing**4%
*“cleans well”*
**Lather**4%
*“Lovely shampoo, lathers nicely and hair felt very nice”*
**Allergies**4%
*“No itching”*
**Advertised Vs Actual Product**3%
*“As described”*
**Thickness**2%
*“Great thickening shampoo”*
### **What buyers complain about **
**Value For Money**10%
*“Not worth it”*
**Smell**9%
*“the smell is pure chemicals”*
**Allergies**9%
*“Irritating”*
**Moist/Dry**6%
*“has become quite dry this shampoo”*
**Hair Related**5%
*“Completely ruined my hair”*
**Functionality-Overall**5%
*“Didn't work for me”*
**Hair Growth**4%
*“Not growing me”*
**Thickness**4%
*“not thicker”*
**Leak-Proof**3%
*“on this occassion it arrived unsealed and leaking”*
**Oily/Greasy**2%
*“It feels greasy”*
### **Top return reasons **
**Leak-Proof**36%
**Suitability Short Hair**6%
**Advertised Vs Actual Product**6%
**Value For Money**5%
**Damage/Burn Hair**5%
**Functionality-Overall**4%
**Moist/Dry**4%
**Ingredients-Overall**3%
**Motor Power**3%
**Size-Overall**3%
## **Common questions**
- **Is seaweed shampoo profitable to sell on Amazon United Kingdom?**
- The niche generates £84K/yr across 20 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -2.3%. Flapen's verdict: Skip it (41/100).
- **How competitive is the seaweed shampoo niche?**
- 10 brands and 65 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 87% of demand.
- **What do buyers complain about in seaweed shampoo?**
- Top complaints mined from reviews: Value For Money, Smell, Allergies. The return rate is 0.1%.
- **When does demand for seaweed shampoo peak?**
- Demand peaks in Jan–Aug–Oct–Nov–Dec; the busiest month runs 4.1× the quietest.
- **What does it cost to enter the seaweed shampoo niche?**
- Listings span £4.10–£21.43; the average listing price is £12.20 (sweet spot $15–$100). The average incumbent carries 4,660 reviews — the moat a new listing must climb.
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