spirulina
Skip itPrices mostly outside the sweet spot ($3.75–$16.73) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great9.8%search→purchase rate — share of searches ending in a sale
Review moat
Okay1,753.94avg incumbent reviews — the moat a new listing must climb
Market size
Okay£179K£179K/yr · 204K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay84%top-5 brand share — brands hold most of the demand
Competition
Bad70%top-5 click share — a locked-up shelf
Avg price
Okay£8.96avg listing price — sweet spot $15–$100
Growth
Bad-19.4%90-day search growth — must beat 0% to launch
Price range
Bad£3.75–£16.73cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, spirulina is a £179K/yr Amazon United Kingdom market (204K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in Sep. Verdict: Skip it — 41/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
spirulina market data
- Units sold / yr
- 15K–20K
- avg 750–1,000/product
- Revenue / yr
- £134K–£179K
- units × avg price
- Conversion rate
- 9.8%
- Avg BSR
- #8
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 94%
- Out of stock
- 5.1%
- Avg brand age
- 64 months
- Avg seller age
- 182 days
Competition & brand share
The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
17
Top-5 brand share
84%
Top 20: 100%
Top-5 click share
70%
Top 20: 100%
Open market
10%
- ALPHA0141%
- Sevenhills Wholefoods20%
- Inner Vitality9%
- Spring Blossom8%
- SS Sport Supplies6%
- WeightWorld6%
- Open — no brand owns it (4 brands, 10%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -19.4% search growth over the last 90 days.Peak months: Sep · busiest ÷ quietest = 2.4×
Top spirulina search terms
- spirulina140K/yr
- spirulina tablets46K/yr
- spirulina capsules10K/yr
- organic spirulina tablets5K/yr
- organic spirulina4K/yr
Top spirulina 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 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Organic Spirulina & Chlorella 2000mg - 300 Tablets - Broken Cell Wall - Cold Pressed Pure Supplement with No Additives (75 Day Supply) by Alpha01
ALPHA01£7.254.6★1,208 rev
Organic Spirulina 2000mg 300 Vegan Tablets - Cold Pressed with No Additives Resealable and Recyclable Pouch by Alpha01
ALPHA01£5.724.6★467 rev
Sevenhills Wholefoods Organic Spirulina Powder 500g | Certified Organic | Nutrient-Dense | 100% Pure & Natural
Sevenhills Wholefoods£9.204.5★6,249 rev
![500G Organic SPIRULINA Tablets [1000 x 500mg] Natural Dietary Food Supplement Premium Quality Non-GMO Vegan Detox Superfood Rich in Protein Vitamins Amino Acids Iron - Soil Association Certified](https://m.media-amazon.com/images/I/41tGSrwNwCL.jpg)
500G Organic SPIRULINA Tablets [1000 x 500mg] Natural Dietary Food Supplement Premium Quality Non-GMO Vegan Detox Superfood Rich in Protein Vitamins Amino Acids Iron - Soil Association Certified
Spring Blossom£10.474.5★1,014 rev
Organic Spirulina 500 Pure Tablets - 2000mg Serving Cold-Pressed Rich in Vitamins & Minerals for Immunity & Energy by Inner Vitality
Inner Vitality£8.004.6★528 rev
Newest
by launch dateOrganic Spirulina 500 Pure Tablets - 2000mg Serving Cold-Pressed Rich in Vitamins & Minerals for Immunity & Energy by Inner Vitality
Inner Vitality£8.00528 rev
Spirulina Tablets | 5000mg per Serving | 1000 Tablets | Organic | Immune Support Booster | MySuperfoods
MySuperfoods£10.223,200 rev
Organic Chlorella and Spirulina - 2500mg - 300 Tablets - Broken Cell Wall - Pure Formula Supplement with No Additives
SS Sport Supplies£9.11442 rev
Organic Spirulina Tablets (360 Tablets) Raw Cold Pressed Spirulina Algae Certified Vegan & Kosher
Everyday Superfood£8.2863 rev
Organic Spirulina 1000x Pure Easy to Swallow Tablets - Rich in Essential Vitamins & Minerals by Inner Vitality
Inner Vitality£11.48528 rev
Trending
90-day click momentum
Naturya Organic Spirulina Powder 100g
Naturya£4.664.6★
Organic Spirulina 500 Pure Tablets - 2000mg Serving Cold-Pressed Rich in Vitamins & Minerals for Immunity & Energy by Inner Vitality
Inner Vitality£8.004.6★
Sevenhills Wholefoods Organic Spirulina Powder 500g | Certified Organic | Nutrient-Dense | 100% Pure & Natural
Sevenhills Wholefoods£9.204.5★
Spirulina Tablets | 5000mg per Serving | 1000 Tablets | Organic | Immune Support Booster | MySuperfoods
MySuperfoods£10.224.6★
Organic Spirulina Powder Capsules 500mg - 120 Vegan Capsules - Organically Grown in the Mongolian Plateau - Non-GMO Made in the UK - G&G Vitamins
G&G Vitamins£7.764.4★
What buyers say about spirulina
What buyers praise and complain about, mined from review topics.What buyers love
“Good well produced product”
“Reasonable price”
“Protein supplements”
“This is a good organic chlorella and spirulina supplement”
“does the job”
“Palatable and easy on stomach”
“Ive also noticed more balanced energy levels overall”
“Is it easy to use”
“Its a natural herb. algi that we dont have in our diets anymore”
“Excellent anti-viral”
What buyers complain about
“Unexpected side effects”
“taste wise it's wildly exaggerated”
“Quality”
“SURELY NOT FIT FOT HUMAN”
“They obviously dont work for me”
“I used to have some digestive problems”
“I don't really care how much nutrients is in this stuff”
“Its pretty horrible on its own in water”
“My only concern is the dosage at 5 capsules daily”
“The tablets have an earthy odour”
Common questions
- Is spirulina profitable to sell on Amazon United Kingdom?
- The niche generates £179K/yr across 16 tracked products. 90-day search growth is -19.4%. Flapen's verdict: Skip it (41/100).
- How competitive is the spirulina niche?
- 10 brands and 17 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 84% of demand.
- What do buyers complain about in spirulina?
- Top complaints mined from reviews: Side Effects, Taste-Overall, Quality-Overall. The return rate is 0.1%.
- When does demand for spirulina peak?
- Demand peaks in Sep; the busiest month runs 2.4× the quietest.
- What does it cost to enter the spirulina niche?
- Listings span £3.75–£16.73; the average listing price is £8.96 (sweet spot $15–$100). The average incumbent carries 1,754 reviews — the moat a new listing must climb.