Is calcium carbonate profitable to sell on Amazon United States?

The niche generates $399K/yr across 24 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +7.6%. Flapen's verdict: Worth a look (55/100).

How competitive is the calcium carbonate niche?

17 brands and 613 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 66% of demand.

What do buyers complain about in calcium carbonate?

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

When does demand for calcium carbonate peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the calcium carbonate niche?

Listings span $5.81–$37.89; the average listing price is $15.18 (sweet spot $15–$100). The average incumbent carries 4,230 reviews — the moat a new listing must climb.

calcium carbonate

Worth a look

Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great8.7%

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

Avg price

Great$15.18

avg listing price — sweet spot $15–$100

Price range

Good$5.81–$37.89

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

Brand share

Good66%

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

Market size

Good$399K

$399K/yr · 302K searches

Competition

Okay63%

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

Growth

Okay+7.6%

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

Review moat

Bad4,229.88

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, calcium carbonate is a $399K/yr Amazon United States market (302K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 55/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

calcium carbonate market data

Units sold / yr: 25K–30K; avg 1,000–1,250/product
Revenue / yr: $380K–$455K; units × avg price
Conversion rate: 8.7%
Avg BSR: #346
Page quality: 0%
Prime: 96%
Sponsored: 83%
Out of stock: 0.6%
Avg brand age: 95 months
Avg seller age: 161 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 rising

Sellers

613

Top-5 brand share

66%

Top 20: 100%

Top-5 click share

63%

Top 20: 96%

Open market

26%

NOW Foods21%
Nutricost15%
CAPYBARA Distributors Inc.10%
BulkSupplements10%
PURE ORIGINAL INGREDIENTS10%
Herbs Botanica8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +7.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top calcium carbonate search terms

calcium carbonate162K/yr +9.8%6.6% conv.
calcium carbonate powder89K/yr +5.6%10.0% conv.
carbonato de calcio14K/yr +12.8%3.1% conv.
calcium carbonate powder food grade11K/yr -5.3%10.3% conv.
calcium carbonate tablets12K/yr -24.0%4.4% conv.
calcium carbonate 1000mg5K/yr +40.7%5.2% conv.
calcium bicarbonate4K/yr +38.2%4.4% conv.
food grade calcium carbonate3K/yr +6.9%8.5% conv.
pure calcium carbonate3K/yr +14.2%11.0% conv.

All search terms

Top calcium carbonate 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

NOW Foods Supplements Calcium Carbonate Powder High Percentage of Calcium Supports Bone Health* 12-Ounce

NOW Foods$9.494.7★2,672 rev

Nutricost Calcium Carbonate Powder 500 Grams

Nutricost$13.844.6★1,072 rev

Calcium Carbonate Powder 8 Oz (226.8 g) Sold by CAPYBARA Distributors Inc.

CAPYBARA Distributors Inc.$9.054.7★254 rev

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$17.724.6★405 rev

Herbs Botanica Calcium Carbonate Powder Food Grade Calcium Supplement for Cooking and Baking Antacid DIY Toothpaste 3.5 oz

Herbs Botanica$5.814.4★98 rev

Newest

by launch date

Vitamatic Calcium Carbonate Powder 500 g (17.6 oz) Unflavored Dietary Supplement Powder Non-GMO

Vitamatic$11.8030 rev

4mo ago

RUNMAG Ultra Fine 400 Mesh Powder Calcium Carbonate 16.0oz USP Food Grade

RUNMAG$10.024 rev

5mo ago

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

berkley jensen$9.961,439 rev

6mo ago

Herbs Botanica Calcium Carbonate Powder Food Grade Calcium Supplement for Cooking and Baking Antacid DIY Toothpaste 3.5 oz

Herbs Botanica$5.8198 rev

1y ago

Calcium Carbonate Powder 8 Oz (226.8 g) Sold by CAPYBARA Distributors Inc.

CAPYBARA Distributors Inc.$9.05254 rev

2y ago

What buyers say about calcium carbonate

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

What buyers love

Value For Money16%

“Good deal”

Quality-Overall15%

“Good Quality”

Calcium12%

“Excellent calcium supplement”

Advertised Vs Actual Product7%

“As advertised”

Vitamin6%

“Good vitamins, thanks”

Efficiency4%

“Does a great job when needed”

Ingredients-Overall3%

“uses organic ingredients”

Taste-Overall3%

“These antacids taste great”

Ease Of Chewing/Swallowing3%

“Chewable, great flavors, and very effective”

Ease Of Use3%

“Ease of use”

What buyers complain about

Size-Overall21%

“Absolutely ridiculous size”

Ease Of Chewing/Swallowing11%

“Difficult to chew as they are literally as hard as rocks”

Value For Money4%

“get a. more expensive”

Taste-Overall4%

“tasteless”

Calcium4%

“Apparently low calcium is a thing”

Vitamin3%

“It would be a great supplement for some just not me”

Ingredients-Overall3%

“are not the same ingredients listed on the bottle”

Smell3%

“Horribly strong odor”

Acid Regulator/Stomach Ache Relief2%

“Stomach pain”

Texture/Consistency-Overall2%

“texture just gag me”

Top return reasons

Calcium18%

Functionality-Overall15%

Advertised Vs Actual Product15%

Ingredients-Overall12%

Smell8%

Size-Overall7%

Ease Of Chewing/Swallowing4%

Texture/Consistency-Overall3%

Dosage2%

Vegan/Organic2%

Common questions

Is calcium carbonate profitable to sell on Amazon United States?: The niche generates $399K/yr across 24 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +7.6%. Flapen's verdict: Worth a look (55/100).
How competitive is the calcium carbonate niche?: 17 brands and 613 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 66% of demand.
What do buyers complain about in calcium carbonate?: Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Value For Money. The return rate is 0.0%.
When does demand for calcium carbonate peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the calcium carbonate niche?: Listings span $5.81–$37.89; the average listing price is $15.18 (sweet spot $15–$100). The average incumbent carries 4,230 reviews — the moat a new listing must climb.