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calcium magnesium

Skip it

Soft demand (-20.4% this quarter) — this niche doesn't clear our bar today.

Market size 31Growth 15Conversion 94Competition 23Returns 100Price range 48Avg price 73Brand share 35Review moat 40Quality gap 30

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great11.8%

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

Avg price

Good€14.77

avg listing price — sweet spot $15–$100

Price range

Okay€3.14–€25.93

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

Review moat

Okay2,451.36

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay84%

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

Market size

Okay€144K

€144K/yr · 83K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad72%

top-5 click share — a locked-up shelf

Growth

Bad-20.4%

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

According to Flapen's Amazon Germany niche tracking, calcium magnesium is a €144K/yr Amazon Germany market (83K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in Jan–Feb. Verdict: Skip it — 44/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

calcium magnesium market data

Units sold / yr
8K–10K
avg 250–500/product
Revenue / yr
€118K–€148K
units × avg price
Conversion rate
11.8%
Avg BSR
#71
Page quality
0%
Prime
100%
Sponsored
100%
Out of stock
1.9%
Avg brand age
70 months
Avg seller age
190 days

Competition & brand share

The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 falling

Sellers

32

Top-5 brand share

84%

Top 20: 100%

Top-5 click share

72%

Top 20: 100%

Open market

9%

  • Doppelherz23%
  • ProFuel22%
  • WeightWorld16%
  • natural elements15%
  • SUNDAY NATURAL8%
  • Vit4ever7%
  • Open — no brand owns it (3 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -20.4% search growth over the last 90 days.
5K3KSpike '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb · busiest ÷ quietest = 1.9×

Top calcium magnesium search terms

  • calcium magnesium34K/yr
  • magnesium calcium23K/yr
  • magnesium calcium d312K/yr
  • magnesium und calcium7K/yr
  • magnesium kalzium4K/yr
  • kalzium magnesium4K/yr
All search terms

Top calcium magnesium 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%€14K20%€29K30%€43K40%€58K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 14 tracked products in this niche — three views at once, no toggling.

What buyers say about calcium magnesium

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

What buyers love

Qualität insgesamt25%

“Super Produkt”

Magnesium24%

“Bestes Magnesium ever”

Preis-Leistungs-Verhältnis9%

“Top Preis/Leistung”

beworben Vs Tatsächliches Produkt4%

“Produkt wie vom Verkäufer beschrieben”

Schlafqualität4%

“und bin überrascht dass ich nun wieder besser Schlafen kann ohne Melatonin einnehmen zu müssen.”

Vitamin3%

“Klasse Supplements”

Linderung von Muskelschmerzen3%

“Muskelentspannung”

Gesamtgröße2%

“Passt”

Einfaches Kauen/Schlucken2%

“Gut zum schlucken”

Benutzerfreundlichkeit2%

“Gut verträglich”

What buyers complain about

Magnesium16%

“Magnesium halt”

Einfaches Kauen/Schlucken7%

“Nicht gut zum schlucken”

Gesamtgröße6%

“Sind groß”

Säureregulator/Linderung von Magenschmerzen6%

“An Menschen die einen schlechten Magen haben, hier ist Oxid enthalten was große Probleme machen kann”

Dosierung5%

“Scheinbar hoher Anteil an (billigem) MG Oxid.”

Benutzerfreundlichkeit4%

“Unbrauchbar”

Kalzium4%

“Die Empfehlung sind 2 Tabletten täglich 800 / 400 mg: Habe gerade gelesen, dass Calcium als Nahrungsergänzungsmittel höchstens 500 mg täglich, wegen sonst schlechter Nebenwirkungen eingenommen werden sollte”

beworben Vs Tatsächliches Produkt3%

“Irreführend”

Nebenwirkungen3%

“noch nie negative Nebenwirkungen gehabt.”

Qualität insgesamt3%

“Ich habe hier ein qualitativ hochwertiges Nahrungsergänzungsmittel gesucht und bestellt und ein aus meiner Sicht minderwertig verarbeitetes Produkt erhalten”

Top return reasons

Magnesium100%

Common questions

Is calcium magnesium profitable to sell on Amazon Germany?
The niche generates €144K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -20.4%. Flapen's verdict: Skip it (44/100).
How competitive is the calcium magnesium niche?
9 brands and 32 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 84% of demand.
What do buyers complain about in calcium magnesium?
Top complaints mined from reviews: Magnesium, Einfaches Kauen/Schlucken, Gesamtgröße. The return rate is 0.1%.
When does demand for calcium magnesium peak?
Demand peaks in Jan–Feb; the busiest month runs 1.9× the quietest.
What does it cost to enter the calcium magnesium niche?
Listings span €3.14–€25.93; the average listing price is €14.77 (sweet spot $15–$100). The average incumbent carries 2,451 reviews — the moat a new listing must climb.