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51

calcium

Worth a look

Shows low returns (0.1%), but soft demand (-4.9% this quarter) keeps it on the watch list.

Market size 66Growth 23Conversion 90Competition 33Returns 99Price range 37Avg price 56Brand share 40Review moat 51Quality gap 28

Returns

Incredible0.1%

return rate — above 6% kills the launch gate

Conversion

Great10.8%

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

Market size

Good€643K

€643K/yr · 467K searches

Avg price

Good€12.70

avg listing price — sweet spot $15–$100

Review moat

Good1,469.67

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay81%

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

Price range

Okay€3.23–€22.05

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

Competition

Okay65%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-4.9%

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

Competition

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 flat

Sellers

45

Top-5 brand share

81%

Open market

16%

  • natural elements34%
  • ProFuel21%
  • Bloom Naturals Beauty Supplements13%
  • Doppelherz7%
  • WeightWorld6%
  • NATURTREU3%
  • Open — no brand owns it (7 brands, 16%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%€64K20%€129K30%€193K40%€257K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.9% search growth over the last 90 days.
10K6KPrime Day '24Spike '24Holiday '24Spike '25Prime Day '25Black Friday '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Reviews

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

What buyers love

Kalzium18%

“Calcium TABLETTEN”

Preis-Leistungs-Verhältnis16%

“preis/Leistung super”

Qualität insgesamt15%

“Super Produkt”

beworben Vs Tatsächliches Produkt10%

“Ware wie Bestellt”

Vitamin6%

“Vitamine”

Einfaches Kauen/Schlucken4%

“Ich selbst hatte bisher keinerlei Probleme bei der Einnahme – die Tabletten sind gut schluckbar”

Benutzerfreundlichkeit4%

“Handhabung”

Dosierung3%

“Gute Kombination mit langem Vorrat”

Gesamtgröße2%

“Passt”

Effizienz1%

“Wirkt”

What buyers complain about

Einfaches Kauen/Schlucken17%

“Nicht schluckbar”

Gesamtgröße11%

“Tabletten relativ gross”

Kalzium9%

“Calcium darf bei mir nie ausgehen”

Geruch7%

“Stinkt richtige ekelhaft”

Allergien4%

“Von den Füllstoffen bekommt man als Allergiker Durchfall”

Säureregulator/Linderung von Magenschmerzen4%

“Nicht vertragen, Durchfall bekommen”

Qualität insgesamt4%

“Schlecht Qualität”

Preis-Leistungs-Verhältnis3%

“Ein Witz der Preis”

beworben Vs Tatsächliches Produkt3%

“Irreführende mg angaben”

Nebenwirkungen3%

“Mir wird jedesmal direkt nach der Einnahme sehr schlecht”

Top return reasons

Kalzium100%