calcium carbonate 600 mg
Skip itA small market ($39K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 6% kills the launch gate
Conversion
Great8.6%search→purchase rate — share of searches ending in a sale
Price range
Good$6.55–$27.11cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good$12.93avg 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
Bad5,369.9avg 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
Competition
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%
Open market
20%
- BulkSupplements29%
- MAJOR13%
- Nature's Bounty11%
- PURE ORIGINAL INGREDIENTS11%
- Nature's Blend10%
- RUGBY LABORATORIES5%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
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
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
Rugby Regular Strength Antacid Chewable Tablets - Made with 500 mg of Calcium Carbonate - Peppermint Flavor - 150 Count
RUGBY LABORATORIES$6.551,432 rev
Pure Original Ingredients Calcium Carbonate No Magnesium Or Rice Fillers Always Pure Lab Verified
PURE ORIGINAL INGREDIENTS$27.11253 rev
Pure Original Ingredients Calcium Carbonate (100 Capsules) Always Pure No Additives Or Fillers Lab Verified
PURE ORIGINAL INGREDIENTS$10.23300 rev
Trending
90-day click momentum
Natures Bounty Calcium 1200 mg with Vitamin D3 - Bone Health Softgels Calcium and Vitamin D Supplement 120 Ct (2-Pack)
Nature's Bounty$15.324.6★
Berkley Jensen Ultra Strength Antacid Chewable Tablets - 1000mg Calcium Carbonate for Heartburn Acid Indigestion Upset Stomach Relief - Assorted Berry Flavor - 265 Count
berkley jensen$9.964.7★
Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets
Nature Made$13.684.7★
Natures Bounty Calcium Plus 400 IU Vitamin D3 Immune Support & Bone Health 300 Tablets
Nature's Bounty$15.894.7★
MAJOR Regular Strength Antacid Tablets - Calcium Carbonate 500 mg - Assorted Fruit Flavor - 150 Chewable Count (2 Pack)
MAJOR$10.014.6★
Demand
Weekly Amazon search volume, last 48 weeks — -3.8% search growth over the last 90 days.Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Good deal”
“reliable”
“Calcium works well”
“As advertised”
“Great value and vitamins”
“The tablets taste good”
“Chewable anacid peppermint”
“But it does a good job”
“Ease of use”
“the dosage is right”
What buyers complain about
“Smaller than expected”
“Too hard to chew”
“bad product this is calcium”
“get a. more expensive”
“The tablets taste a little chalky”
“at least not for the amount of D3 recommended by my doctor”
“Hard As Rocks”
“Cheap”
“These are too hard sometimes to take”
“Not as thick as others”