Is calcium carbonate 600 mg profitable to sell on Amazon United States?

The niche generates $39K/yr across 20 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -3.8%. Flapen's verdict: Skip it (45/100).

How competitive is the calcium carbonate 600 mg niche?

13 brands and 150 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 74% of demand.

What do buyers complain about in calcium carbonate 600 mg?

Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Calcium. The return rate is 0.0%.

What does it cost to enter the calcium carbonate 600 mg niche?

Listings span $6.55–$27.11; the average listing price is $12.93 (sweet spot $15–$100). The average incumbent carries 5,370 reviews — the moat a new listing must climb.

calcium carbonate 600 mg

Skip it

A small market ($39K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great8.6%

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

Price range

Good$6.55–$27.11

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

Avg price

Good$12.93

avg listing price — sweet spot $15–$100

Brand share

Good74%

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

Competition

Okay57%

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

Review moat

Bad5,369.9

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-3.8%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$39K

$39K/yr · 36K searches

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, calcium carbonate 600 mg is a $39K/yr Amazon United States market (36K searches/yr). The top 5 brands hold 74% of demand. Verdict: Skip it — 45/100.

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

calcium carbonate 600 mg market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $39K–$52K; units × avg price
Conversion rate: 8.6%
Avg BSR: #291
Page quality: 0%
Prime: 100%
Sponsored: 80%
Out of stock: 0.3%
Avg brand age: 103 months
Avg seller age: 154 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

150

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

57%

Top 20: 100%

Open market

20%

BulkSupplements29%
MAJOR13%
Nature's Bounty11%
PURE ORIGINAL INGREDIENTS11%
Nature's Blend10%
RUGBY LABORATORIES5%

Demand

Weekly Amazon search volume, last 48 weeks — -3.8% search growth over the last 90 days.

Open Trend

Top calcium carbonate 600 mg search terms

calcium carbonate 500mg19K/yr +0.9%8.6% conv.
calcium carbonate tablets11K/yr -28.8%6.2% conv.
calcium carbonate 1000mg5K/yr +50.2%6.8% conv.

All search terms

Top calcium carbonate 600 mg 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

BulkSupplements.com Calcium Carbonate Capsules - Calcium Carbonate Supplement Calcium Carbonate 500mg - Calcium Supplement Gluten Free 2 Capsules per Serving 360 Capsules (Pack of 1)

BulkSupplements$17.684.6★396 rev

Pure Original Ingredients Calcium Carbonate (100 Capsules) Always Pure No Additives Or Fillers Lab Verified

PURE ORIGINAL INGREDIENTS$10.234.6★300 rev

Natures Blend Pure Calcium Carbonate 600 mg 100 Tabs (1684)

Nature's Blend$9.404.6★1,083 rev

MAJOR Regular Strength Antacid Tablets - Calcium Carbonate 500 mg - Assorted Fruit Flavor - 150 Chewable Count (2 Pack)

MAJOR$10.014.6★881 rev

Natures Bounty Calcium Plus 400 IU Vitamin D3 Immune Support & Bone Health 300 Tablets

Nature's Bounty$15.894.7★7,158 rev

Newest

by launch date

Berkley Jensen Ultra Strength Antacid Chewable Tablets - 1000mg Calcium Carbonate for Heartburn Acid Indigestion Upset Stomach Relief - Assorted Berry Flavor - 265 Count

berkley jensen$9.961,381 rev

5mo ago

BulkSupplements.com Calcium Carbonate Capsules - Calcium Carbonate Supplement Calcium Carbonate 500mg - Calcium Supplement Gluten Free 2 Capsules per Serving 360 Capsules (Pack of 1)

BulkSupplements$17.68396 rev

3y ago

Rugby Regular Strength Antacid Chewable Tablets - Made with 500 mg of Calcium Carbonate - Peppermint Flavor - 150 Count

RUGBY LABORATORIES$6.551,432 rev

5y ago

Pure Original Ingredients Calcium Carbonate No Magnesium Or Rice Fillers Always Pure Lab Verified

PURE ORIGINAL INGREDIENTS$27.11253 rev

6y ago

Pure Original Ingredients Calcium Carbonate (100 Capsules) Always Pure No Additives Or Fillers Lab Verified

PURE ORIGINAL INGREDIENTS$10.23300 rev

7y ago

What buyers say about calcium carbonate 600 mg

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

What buyers love

Value For Money19%

“Good deal”

Quality-Overall15%

“reliable”

Calcium14%

“Calcium works well”

Advertised Vs Actual Product8%

“As advertised”

Vitamin6%

“Great value and vitamins”

Taste-Overall6%

“The tablets taste good”

Ease Of Chewing/Swallowing3%

“Chewable anacid peppermint”

Efficiency3%

“But it does a good job”

Ease Of Use3%

“Ease of use”

Dosage2%

“the dosage is right”

What buyers complain about

Size-Overall18%

“Smaller than expected”

Ease Of Chewing/Swallowing10%

“Too hard to chew”

Calcium6%

“bad product this is calcium”

Value For Money4%

“get a. more expensive”

Taste-Overall4%

“The tablets taste a little chalky”

Dosage4%

“at least not for the amount of D3 recommended by my doctor”

Hard Feel2%

“Hard As Rocks”

Quality-Overall2%

“Cheap”

Ease Of Use2%

“These are too hard sometimes to take”

Thickness2%

“Not as thick as others”

Top return reasons

Calcium38%

Ease Of Chewing/Swallowing19%

Size-Overall12%

Advertised Vs Actual Product8%

Ingredients-Overall4%