---
title: "Spirulina Capsules — $843K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/spirulina-capsules"
last_updated: "2026-08-10T19:25:10.848Z"
locale: en
meta:
description: "Niche score 59/100 · $843K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 59/100 · $843K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Spirulina Capsules — $843K/yr Amazon US Niche (2026) - Flapen"
---
# **spirulina capsules**
**Worth a look**
Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 75Growth 20Conversion 84Competition 59Returns 100Price range 70Avg price 95Brand share 51Review moat 28Quality gap 27
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$23.76**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****9.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$843K**
$843K/yr · 384K searches
**Price range**
**Good****$5.82–$126.95**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****50%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****75%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****3,700.32**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-10.8%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, spirulina capsules is a $843K/yr Amazon United States market (384K searches/yr). The top 5 brands hold 75% of demand. Verdict: Worth a look — 59/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **spirulina capsules market data**
- **Units sold / yr**
- **30K–40K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **$713K–$950K**
- units × avg price
- **Conversion rate**
- **9.2%**
- **Avg BSR**
- **#203**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **74%**
- **Out of stock**
- **3.0%**
- **Avg brand age**
- **73 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**19 **▲rising
**Sellers**
**47**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**50%**
Top 20: 85%
**Open market**
**22%**
- Nutrex Hawaii22% - NOW Foods20% - Micro Ingredients17% - Triquetra Health9% - Carlyle6% - HCL HERBAL CODE LABS4%
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -10.8% search growth over the last 90 days.
9K7KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/health-household/spirulina-capsules/trend)
## **Top spirulina capsules search terms**
- **spirulina capsules**161K/yr-19.8%7.8% conv. - **spirulina tablets**56K/yr+11.7%6.8% conv. - **spirulina capsules organic**36K/yr-21.3%6.8% conv. - **nutrex hawaii spirulina**12K/yr+23.6%9.7% conv. - **organic spirulina tablets**9K/yr+16.3%8.1% conv. - **hawaiian spirulina**15K/yr+0.0%6.6% conv. - **hawaiian spirulina powder**7K/yr+71.7%8.9% conv. - **espirulina capsulas**8K/yr+7.1%3.5% conv. - **spirulina pills**7K/yr+11.8%5.9% conv. - **pure hawaiian spirulina**8K/yr-8.2%9.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/spirulina-capsules/search-terms)
## **Top spirulina capsules 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%4%$34K8%$67K12%$101K16%$135K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**$12.63**4.6★8,154 rev](https://www.amazon.com/dp/B00HCBN674) [2**Micro Ingredients Organic Spirulina Supplement 720 Tablets (4 Month Supply) No Filler & Non-GMO Rich in Vegan Protein Vitamins & Prebiotics Premium Spirulina Pills**Micro Ingredients**$25.30**4.6★9,946 rev](https://www.amazon.com/dp/B01DPW5DC4) [3**Nutrex Hawaii Pure Hawaiian Spirulina Vegan Superfood 500 mg Tablets Farm Grown in Kona Non-GMO Immune Support & Cellular Energy 400 Count**Nutrex Hawaii**$30.00**4.6★10,873 rev](https://www.amazon.com/dp/B0039ITKSI) [4**Organic Spirulina Tablets (360 Tablets) - Made with Parry Spirulina The Best Spirulina in the World Highest Nutrient Density - Non-Irradiated 3 Organic Certifications (90 Servings)**Triquetra Health**$28.63**4.6★3,401 rev](https://www.amazon.com/dp/B08S4982CC) [5**Nutrex Hawaii Pure Hawaiian Spirulina Powder - Vegan Superfood Farm Grown Non-GMO Immune Support & Cellular Energy 90 Day Supply 9.53 Oz**Nutrex Hawaii**$25.21**4.6★6,993 rev](https://www.amazon.com/dp/B0FSTJMJFT)
**~~View all top sellers →~~**
### **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**$25.21**6,993 rev10mo ago](https://www.amazon.com/dp/B0FSTJMJFT) [**Micro Ingredients Organic Spirulina Chlorella Mini Tablets 2 500 Tablets (8 Month Supply) | 50/50 Algae Blend | No Fillers Non-GMO**Micro Ingredients**$26.72**478 rev1y ago](https://www.amazon.com/dp/B0F3GG32FF) [**Spirulina Capsules 3000mg - 40 Servings Of Organic Spirulina Capsules - Rich in Protein Antioxidants & Vitamins - 240 Organic Espirulina Powder - Supports Immune & Cardiovascular Health**Nautical Elements**$19.66**1,553 rev2y ago](https://www.amazon.com/dp/B0CXL6M8MN) [**Pure Hawaiian Blue Green Spirulina Powder Capsules - 470mg Capsules 100 Pills Non GMO Natural**Complete Natural Products**$12.98**29 rev2y ago](https://www.amazon.com/dp/B0CJGRHRS3) [**NOW Foods Organic Spirulina 1000mg Tablets - 300 Count - Non-GMO Super Green Whole Food Supplement - Double Strength**NOW Foods**$29.74**8,154 rev3y ago](https://www.amazon.com/dp/B0CB96KGXW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pure Hawaiian Blue Green Spirulina Powder Capsules - 470mg Capsules 100 Pills Non GMO Natural**Complete Natural Products**$12.98**4.5★**▲ 202%**](https://www.amazon.com/dp/B0CJGRHRS3) [**Nutrex Hawaii Pure Hawaiian Spirulina Powder - Vegan Superfood Farm Grown Non-GMO Immune Support & Cellular Energy 90 Day Supply 9.53 Oz**Nutrex Hawaii**$25.21**4.6★**▲ 102%**](https://www.amazon.com/dp/B0FSTJMJFT) [**Carlyle Organic Chlorella Spirulina Tablets | 1300 Count | 50/50 Blend**Carlyle**$19.61**4.6★**▲ 88%**](https://www.amazon.com/dp/B0C6YNWB5P) [**Micro Ingredients Organic Spirulina Chlorella Mini Tablets 2 500 Tablets (8 Month Supply) | 50/50 Algae Blend | No Fillers Non-GMO**Micro Ingredients**$26.72**4.7★**▲ 83%**](https://www.amazon.com/dp/B0F3GG32FF) [**PURE ORIGINAL INGREDIENTS Spirulina (100 Capsules) Rich in Phycocyanin Pure**PURE ORIGINAL INGREDIENTS**$5.96**4.5★**▲ 62%**](https://www.amazon.com/dp/B0954ZFPM9)
**~~View all trending →~~**
## **What buyers say about spirulina capsules**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Great quality, clean ingredients”*
**Nutritional Content**8%
*“Great supplement and”*
**Energy Level**8%
*“Lots of energy”*
**Value For Money**7%
*“it's very affordable”*
**Vegan/Organic**5%
*“Organic vitamins”*
**Vitamin**5%
*“I love this vitamin”*
**Ease Of Use**5%
*“These tablets are easy to take”*
**Advertised Vs Actual Product**4%
*“Excellent product, as advertised”*
**Detoxification**3%
*“Great detox”*
**Ease Of Chewing/Swallowing**3%
*“Easy to swallow”*
### **What buyers complain about **
**Dosage**9%
*“The dose is ridiculous”*
**Smell**9%
*“The smell of it is unbearable”*
**Quality-Overall**6%
*“I would rather pay extra to have better quality spirulina that doesn't have the cancer risk on the packaging”*
**Acid Regulator/Stomach Ache Relief**5%
*“Stomach pain”*
**Side Effects**4%
*“Made me very sick to my stomach”*
**Taste-Overall**4%
*“Obviously spirulina does not taste good by itself”*
**Functionality-Overall**4%
*“Didn't work”*
**Size-Overall**3%
*“they are small”*
**Allergies**3%
*“Adverse reaction”*
**Value For Money**3%
*“Way Too Expensive For No results after consuming one whole bag”*
### **Top return reasons **
**Advertised Vs Actual Product**34%
**Dosage**15%
**Smell**8%
**Value For Money**8%
**Size-Overall**7%
**Functionality-Overall**4%
**Vitamin**4%
**Heart Health**4%
**Nutritional Content**3%
**Ingredients-Overall**2%
## **Common questions**
- **Is spirulina capsules profitable to sell on Amazon United States?**
- The niche generates $843K/yr across 34 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.8%. Flapen's verdict: Worth a look (59/100).
- **How competitive is the spirulina capsules niche?**
- 19 brands and 47 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in spirulina capsules?**
- Top complaints mined from reviews: Dosage, Smell, Quality-Overall. The return rate is 0.1%.
- **When does demand for spirulina capsules peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the spirulina capsules niche?**
- Listings span $5.82–$126.95; the average listing price is $23.76 (sweet spot $15–$100). The average incumbent carries 3,700 reviews — the moat a new listing must climb.
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