algae calcium
Worth a lookShows low returns (0.0%), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Market size
Incredible$3.8M$3.8M/yr · 531K searches
Conversion
Great8.2%search→purchase rate — share of searches ending in a sale
Avg price
Great$87.60avg listing price — sweet spot $15–$100
Review moat
Okay1,819.87avg incumbent reviews — the moat a new listing must climb
Growth
Okay+10.9%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Price range
Okay$14.63–$273.36cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Bad75%top-5 click share — a locked-up shelf
Brand share
Bad98%top-5 brand share — brand-locked demand
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
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.No pronounced peak months · busiest ÷ quietest = 1.3×
Top algae calcium search terms
- algaecal plus145K/yr
- algaecal177K/yr
- algaecal plus bone strength52K/yr
- algae cal26K/yr
- algae calcium24K/yr
- algae cal plus14K/yr
- algae calcium supplement15K/yr
- algae cal+11K/yr
- algaecal calcium8K/yr
- aquamin calcium6K/yr
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.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 1 Pack
ALGAECAL$54.224.6★1,325 rev
ALGAECAL Plus Calcium Supplement for Bone Density with D3 K2 120 Caps
ALGAECAL$80.344.6★1,860 rev
ALGAECAL Bone Builder Pack Calcium + Strontium for Bone Density 1 Month
ALGAECAL$110.014.5★2,216 rev
ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 1 Pack
ALGAECAL$58.764.5★1,442 rev
ALGAECAL Plus Calcium Supplement for Bone Density D3 K2 120 Caps 3 Packs
ALGAECAL$213.624.6★1,860 rev
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$28.4537 rev
AlgaeCal Magnesium Relax for Sleep Stress & Cortisol 60 Caps 2 Packs
ALGAECAL$54.88144 rev
ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 3 Packs
ALGAECAL$146.491,442 rev
ALGAECAL Collagen Peptides Skin Joint Bone Benefits 30 Servings 1 Pack
ALGAECAL$58.761,442 rev
ALGAECAL D3 Complete Vitamins D3 K2 A & E for Bones 60 Softgels 1 Pack
ALGAECAL$35.72623 rev
Trending
90-day click momentumAlgaeCal Magnesium Relax for Sleep Stress & Cortisol 60 Caps 2 Packs
ALGAECAL$54.884.3★
ALGAECAL Plus Calcium Supplement for Bone Density D3 K2 120 Caps 3 Packs
ALGAECAL$213.624.6★
ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 3 Packs
ALGAECAL$148.314.6★
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$28.454.2★
ALGAECAL Plant Based Calcium Supplement for Bone Strength 90 Caps 1 Pack
ALGAECAL$54.224.6★
What buyers say about algae calcium
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent product”
“Great calcium”
“The product effectively alleviates joint pain”
“No issues with swallowing although the capsules are on the larger size”
“Great vitamin feel a difference like the k2 d3”
“It seems to be effective”
“dissolves good with no clumping”
“Easy peasy”
“As advertised”
“Reasonable price”
What buyers complain about
“Too expensive”
“I could not tolerate straight calcium”
“I gave this 3 stars because the dosage is NOT correct”
“Stomach Issues”
“It may be tasteless”
“couldn't take it”
“it can have numerous side effects”
“Difficult to swallow”
“May cause allergic reaction”
“Container should be smaller not in product”
Top return reasons
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.