seaweed shampoo
Skip itA small market ($84K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Avg price
Good£12.20avg listing price — sweet spot $15–$100
Price range
Okay£4.10–£21.43cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Conversion
Okay2.4%search→purchase rate — share of searches ending in a sale
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Review moat
Bad4,660.15avg 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
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.Peak months: Jan, Aug, Oct, Nov, Dec · busiest ÷ quietest = 4.1×
Top seaweed shampoo search terms
- cornish seaweed shampoo and conditioner85K/yr
- seaweed shampoo88K/yr
- sea magik23K/yr
- cornish seaweed shampoo13K/yr
- seaweed shampoo and conditioner16K/yr
- the cornish seaweed company shampoo11K/yr
- cornish seaweed bath company shampoo19K/yr
- cornish seaweed bath company8K/yr
- super nutrient shampoo cornish seaweed5K/yr
- sea magik shampoo and conditioner6K/yr
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.
All 20 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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£17.864.2★353 rev
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£10.684.5★208 rev
Faith In Nature Natural Seaweed & Citrus Shampoo Detoxifying for Oily Hair & Scalp Vegan & Cruelty Free No SLS Silicones or Parabens 400ml
FAITH IN NATURE£4.534.5★13,596 rev
Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts
Scottish Fine Soaps£8.844.4★55 rev
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£14.283.8★76 rev
Newest
by launch date
Method Daily Shampoo Daily Zen Cucumber Seaweed & Green Tea Scent Sulphate-Free 350ml
Method£4.10291 rev
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£19.0494 rev
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£18.9216 rev
Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts
Scottish Fine Soaps£8.8455 rev
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£14.48568 rev
Trending
90-day click momentumSea 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£18.924.1★
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£11.504.3★
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£19.044.0★
Method Daily Shampoo Daily Zen Cucumber Seaweed & Green Tea Scent Sulphate-Free 350ml
Method£4.104.4★
Scottish Fine Soaps Sea Kelp Shampoo 300ml Nourishing Hair & Scalp Shampoo with Sea Kelp Magnesium and Seaweed Extracts
Scottish Fine Soaps£8.844.4★
What buyers say about seaweed shampoo
What buyers praise and complain about, mined from review topics.What buyers love
“An effective product”
“the fragrance is lovely”
“Grow me hair”
“very soft”
“Excellent Value”
“cleans well”
“Lovely shampoo, lathers nicely and hair felt very nice”
“No itching”
“As described”
“Great thickening shampoo”
What buyers complain about
“Not worth it”
“the smell is pure chemicals”
“Irritating”
“has become quite dry this shampoo”
“Completely ruined my hair”
“Didn't work for me”
“Not growing me”
“not thicker”
“on this occassion it arrived unsealed and leaking”
“It feels greasy”
Top return reasons
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.