---
title: "Algae Calcium — $3.8M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/algae-calcium"
last_updated: "2026-08-09T08:44:54.444Z"
locale: en
meta:
description: "Niche score 53/100 · $3.8M/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $3.8M/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Algae Calcium — $3.8M/yr Amazon US Niche (2026) - Flapen"
---
# **algae calcium**
**Worth a look**
Shows low returns (0.0%), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Market size 97Growth 39Conversion 80Competition 21Returns 100Price range 33Avg price 80Brand share 4Review moat 47Quality gap 37
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Market size**
**Incredible****$3.8M**
$3.8M/yr · 531K searches
**Conversion**
**Great****8.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$87.60**
avg listing price — sweet spot $15–$100
**Review moat**
**Okay****1,819.87**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+10.9%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Price range**
**Okay****$14.63–$273.36**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Bad****75%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****98%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, algae calcium is a $3.8M/yr Amazon United States market (531K searches/yr). The top 5 brands hold 98% of demand. Verdict: Worth a look — 53/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **algae calcium market data**
- **Units sold / yr**
- **40K–50K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **$3.5M–$4.4M**
- units × avg price
- **Conversion rate**
- **8.2%**
- **Avg BSR**
- **#204**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **93%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **88 months**
- **Avg seller age**
- **165 days**
## **Competition & brand share**
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **▲rising
**Sellers**
**22**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**75%**
Top 20: 100%
**Open market**
**0%**
- ALGAECAL87% - sapling5% - New Chapter2% - ZAB2% - PlantFusion2% - NOW Foods2%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +10.9% search growth over the last 90 days.
15K10KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/health-household/algae-calcium/trend)
## **Top algae calcium search terms**
- **algaecal plus**145K/yr+32.2%6.8% conv. - **algaecal**177K/yr-8.6%6.8% conv. - **algaecal plus bone strength**52K/yr-24.1%5.0% conv. - **algae cal**26K/yr+11.6%7.8% conv. - **algae calcium**24K/yr+12.5%4.0% conv. - **algae cal plus**14K/yr+2.3%7.6% conv. - **algae calcium supplement**15K/yr+10.5%3.5% conv. - **algae cal+**11K/yr+5.3%6.3% conv. - **algaecal calcium**8K/yr+60.9%3.7% conv. - **aquamin calcium**6K/yr+66.8%0.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/algae-calcium/search-terms)
## **Top algae calcium 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%$381K20%$762K30%$1.1M40%$1.5M101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 1 Pack**ALGAECAL**$54.22**4.6★1,325 rev](https://www.amazon.com/dp/B09ZQ74495) [2**ALGAECAL Plus Calcium Supplement for Bone Density with D3 K2 120 Caps**ALGAECAL**$80.34**4.6★1,860 rev](https://www.amazon.com/dp/B0B1N5Z372) [3**ALGAECAL Bone Builder Pack Calcium + Strontium for Bone Density 1 Month**ALGAECAL**$110.01**4.5★2,216 rev](https://www.amazon.com/dp/B07MFZSLFZ) [4**ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 1 Pack**ALGAECAL**$58.76**4.5★1,442 rev](https://www.amazon.com/dp/B0D5F7XZ6D) [5**ALGAECAL Plus Calcium Supplement for Bone Density D3 K2 120 Caps 3 Packs**ALGAECAL**$213.62**4.6★1,860 rev](https://www.amazon.com/dp/B07M861KG1)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**ZAB Algae Calcium Supplement Plant Based with Vitamin D3 & K2 MK7 Magnesium Calcium Complex for Daily Bone Health Support & Strength 90 Capsules 45-Day Supply**ZAB**$28.45**37 rev6mo ago](https://www.amazon.com/dp/B0FHQSFP2N) [**AlgaeCal Magnesium Relax for Sleep Stress & Cortisol 60 Caps 2 Packs**ALGAECAL**$54.88**144 rev9mo ago](https://www.amazon.com/dp/B0FQ212G5G) [**ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 3 Packs**ALGAECAL**$146.49**1,442 rev2y ago](https://www.amazon.com/dp/B0D5FGX6R4) [**ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 1 Pack**ALGAECAL**$58.76**1,442 rev2y ago](https://www.amazon.com/dp/B0D5F7XZ6D) [**ALGAECAL D3 Complete Vitamins D3 K2 A & E for Bones 60 Softgels 1 Pack**ALGAECAL**$35.72**623 rev2y ago](https://www.amazon.com/dp/B0CHKBK1NG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AlgaeCal Magnesium Relax for Sleep Stress & Cortisol 60 Caps 2 Packs**ALGAECAL**$54.88**4.3★**▲ 162%**](https://www.amazon.com/dp/B0FQ212G5G) [**ALGAECAL Plus Calcium Supplement for Bone Density D3 K2 120 Caps 3 Packs**ALGAECAL**$213.62**4.6★**▲ 73%**](https://www.amazon.com/dp/B07M861KG1) [**ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 3 Packs**ALGAECAL**$148.31**4.6★**▲ 68%**](https://www.amazon.com/dp/B0B18Y1NK8) [**ZAB Algae Calcium Supplement Plant Based with Vitamin D3 & K2 MK7 Magnesium Calcium Complex for Daily Bone Health Support & Strength 90 Capsules 45-Day Supply**ZAB**$28.45**4.2★**▲ 47%**](https://www.amazon.com/dp/B0FHQSFP2N) [**ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 1 Pack**ALGAECAL**$54.22**4.6★**▲ 30%**](https://www.amazon.com/dp/B09ZQ74495)
**~~View all trending →~~**
## **What buyers say about algae calcium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Excellent product”*
**Calcium**15%
*“Great calcium”*
**Joint Pain**6%
*“The product effectively alleviates joint pain”*
**Ease Of Chewing/Swallowing**4%
*“No issues with swallowing although the capsules are on the larger size”*
**Vitamin**4%
*“Great vitamin feel a difference like the k2 d3”*
**Efficiency**4%
*“It seems to be effective”*
**Solubility**4%
*“dissolves good with no clumping”*
**Ease Of Use**3%
*“Easy peasy”*
**Advertised Vs Actual Product**3%
*“As advertised”*
**Value For Money**3%
*“Reasonable price”*
### **What buyers complain about **
**Value For Money**15%
*“Too expensive”*
**Calcium**6%
*“I could not tolerate straight calcium”*
**Dosage**5%
*“I gave this 3 stars because the dosage is NOT correct”*
**Acid Regulator/Stomach Ache Relief**5%
*“Stomach Issues”*
**Taste-Overall**4%
*“It may be tasteless”*
**Functionality-Overall**3%
*“couldn't take it”*
**Side Effects**3%
*“it can have numerous side effects”*
**Ease Of Chewing/Swallowing**3%
*“Difficult to swallow”*
**Allergies**3%
*“May cause allergic reaction”*
**Size-Overall**3%
*“Container should be smaller not in product”*
### **Top return reasons **
**Calcium**25%
**Instructions/User Manual/Troubleshooting**25%
**Sensitivity-Overall**13%
**Ingredients-Overall**13%
**Compatibility-Overall**13%
**Regulates Digestion**13%
## **Common questions**
- **Is algae calcium profitable to sell on Amazon United States?**
- The niche generates $3.8M/yr across 15 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +10.9%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the algae calcium niche?**
- 6 brands and 22 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in algae calcium?**
- Top complaints mined from reviews: Value For Money, Calcium, Dosage. The return rate is 0.0%.
- **When does demand for algae calcium peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the algae calcium niche?**
- Listings span $14.63–$273.36; the average listing price is $87.60 (sweet spot $15–$100). The average incumbent carries 1,820 reviews — the moat a new listing must climb.
## **Related niches in Health & Household**
- 76 [**cedar oil**](https://flapen.com/research/us/health-household/cedar-oil)$1.2M/yr+214.4%**Launch it**- 77 [**nutrapure glp1 cutting mix**](https://flapen.com/research/us/health-household/nutrapure-glp1-cutting-mix)$149K/yr+940.2%**Worth a look**- 77 [**dexcom g7**](https://flapen.com/research/us/health-household/dexcom-g7)$2.0M/yr+39.9%**Launch it**- 77 [**purelia**](https://flapen.com/research/us/health-household/purelia)$635K/yr+359.7%**Worth a look**- 77 [**graduation napkins**](https://flapen.com/research/us/health-household/graduation-napkins)$302K/yr+385.7%**Worth a look**- 77 [**credit card wand**](https://flapen.com/research/us/health-household/credit-card-wand)$418K/yr+101.3%**Worth a look**[**All Health & Household niches **](https://flapen.com/research/us/health-household)