Is spirulina profitable to sell on Amazon United States?

The niche generates $3.0M/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.1%. Flapen's verdict: Worth a look (56/100).

How competitive is the spirulina niche?

11 brands and 564 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in spirulina?

Top complaints mined from reviews: Taste-Overall, Smell, Advertised Vs Actual Product. The return rate is 0.1%.

When does demand for spirulina peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the spirulina niche?

Listings span $5.82–$39.92; the average listing price is $21.49 (sweet spot $15–$100). The average incumbent carries 5,417 reviews — the moat a new listing must climb.

spirulina

Worth a look

Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Market size

Incredible$3.0M

$3.0M/yr · 2.4M searches

Avg price

Great$21.49

avg listing price — sweet spot $15–$100

Price range

Good$5.82–$39.92

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Good5.7%

search→purchase rate — share of searches ending in a sale

Brand share

Okay78%

top-5 brand share — brands hold most of the demand

Competition

Okay64%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad5,416.88

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-14.1%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, spirulina is a $3.0M/yr Amazon United States market (2.4M searches/yr). The top 5 brands hold 78% of demand. Verdict: Worth a look — 56/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

spirulina market data

Units sold / yr: 150K–200K; avg 8,000–10,000/product
Revenue / yr: $3.2M–$4.3M; units × avg price
Conversion rate: 5.7%
Avg BSR: #183
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 3.4%
Avg brand age: 71 months
Avg seller age: 153 days

Competition & brand share

The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

564

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

64%

Top 20: 100%

Open market

17%

Kate Naturals26%
Micro Ingredients20%
Zazzee19%
NOW Foods8%
Nutrex Hawaii5%
Incas by Asiya Life5%
Open — no brand owns it (5 brands, 17%)

Demand & seasonality

Weekly Amazon search volume, last 99 weeks — -14.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top spirulina search terms

spirulina1.3M/yr -12.4%4.6% conv.
spirulina powder organic498K/yr -31.6%5.7% conv.
spirulina powder289K/yr -3.6%5.3% conv.
espirulina62K/yr +27.5%2.0% conv.
organic spirulina powder59K/yr -15.2%5.2% conv.
espirulina organica36K/yr +42.3%2.1% conv.
organic spirulina42K/yr -10.3%5.2% conv.
spirulina organic24K/yr -8.2%4.2% conv.
espirulina en polvo organica pura22K/yr +11.1%2.3% conv.
spirulina protein19K/yr -36.3%0.7% conv.

All search terms

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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kate Naturals Organic Spirulina Powder for Immune Support and Antioxidants. Nutrient Dense Superfood Supplement (8 oz USDA Certified Non-GMO Gluten- Free)

Kate Naturals$9.964.5★5,173 rev

Zazzee USDA Organic Spirulina Powder 2.2 Pounds (1 KG) 303 Servings Certified Kosher 100% Pure Non-Irradiated Mess-Free Wide Mouth Container Fresh Smell and Neutral Taste Non-GMO Made in USA

Zazzee$39.924.5★7,699 rev

Organic Spirulina Powder 1lb | Blue-Green Algae Naturally Occurring Vegan Protein Vitamins & Minerals | Source of Natural Chlorophyll & Enzymes | Non-GMO Gluten-Free No Additives

Micro Ingredients$21.674.5★9,857 rev

NOW Foods Supplements Certified Organic Spirulina 1000 mg (Double Strength) Rich in Beta-Carotene (Vitamin A) and B-12 with naturally occurring GLA 120 Tablets

NOW Foods$12.634.6★8,154 rev

USDA Organic Blue Spirulina Powder (Phycocyanin Extract) No Fishy Smell 100% Vegan Protein from Blue-Green Algae 28 Servings Natural Food Coloring for Smoothies Baking & Drinks (1 Ounce)

Incas by Asiya Life$16.184.6★1,114 rev

Newest

by launch date

Nutrex Hawaii Pure Hawaiian Spirulina Powder - Vegan Superfood Farm Grown Non-GMO Immune Support & Cellular Energy 90 Day Supply 9.53 Oz

Nutrex Hawaii$25.216,993 rev

10mo ago

Micro Ingredients Organic Spirulina Chlorella Mini Tablets 2 500 Tablets (8 Month Supply) | 50/50 Algae Blend | No Fillers Non-GMO

Micro Ingredients$26.72478 rev

1y ago

365 by Whole Foods Market Organic Spirulina Superfood Powder 4 Ounce

365 by Whole Foods Market$12.48694 rev

3y ago

Carlyle Organic Spirulina Tablets | 3500mg | 500 Count

Carlyle$14.421,524 rev

3y ago

Kate Naturals Organic Spirulina Powder for Immune Support and Antioxidants. Nutrient Dense Superfood Supplement (8 oz USDA Certified Non-GMO Gluten- Free)

Kate Naturals$9.965,173 rev

4y ago

What buyers say about spirulina

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall15%

“Excellent product”

Nutritional Content9%

“Excellent food supplement”

Taste-Overall8%

“Has a earthy taste”

Value For Money8%

“Great product for a reasonable price”

Energy Level7%

“boost my energy”

Advertised Vs Actual Product5%

“Product is just as advertised”

Ease Of Use4%

“Easy to use”

Vegan/Organic4%

“Organic vitamins”

Color4%

“The color is awesome”

Vitamin2%

“Great supplement”

What buyers complain about

Taste-Overall15%

“taste that is unpleasant to me”

Smell7%

“Fishy smell”

Advertised Vs Actual Product5%

“Unhappy with the false advertising”

Dosage5%

“False advertising on dosage amounts”

Quality-Overall4%

“I would rather pay extra to have better quality spirulina that doesn't have the cancer risk on the packaging”

Side Effects4%

“These wrecked our stomachs”

Acid Regulator/Stomach Ache Relief3%

“the painful bloating that makes eating impossible”

Value For Money3%

“Kind of disappointing especially for the price”

Nutritional Content3%

“Health problems”

Size-Overall3%

“Bag smaller than expected”

Top return reasons

Advertised Vs Actual Product31%

Dosage13%

Value For Money11%

Size-Overall7%

Smell6%

Functionality-Overall5%

Nutritional Content4%

Heart Health3%