Is calcium 500mg profitable to sell on Amazon United States?

The niche generates $242K/yr across 17 tracked products. 90-day search growth is +13.5%. Flapen's verdict: Worth a look (50/100).

How competitive is the calcium 500mg niche?

8 brands and 117 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 90% of demand.

What do buyers complain about in calcium 500mg?

Top complaints mined from reviews: Size-Overall, Taste-Overall, Calcium. The return rate is 0.0%.

When does demand for calcium 500mg peak?

Demand is steady year-round — the busiest month runs 1.6× the quietest.

What does it cost to enter the calcium 500mg niche?

Listings span $5.26–$32.09; the average listing price is $14.89 (sweet spot $15–$100). The average incumbent carries 6,168 reviews — the moat a new listing must climb.

calcium 500mg

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

Incredible12.2%

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

Avg price

Good$14.89

avg listing price — sweet spot $15–$100

Price range

Good$5.26–$32.09

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

Market size

Okay$242K

$242K/yr · 134K searches

Growth

Okay+13.5%

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

Competition

Okay66%

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

Brand share

Bad90%

top-5 brand share — brand-locked demand

Review moat

Bad6,167.82

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 500mg is a $242K/yr Amazon United States market (134K searches/yr). The top 5 brands hold 90% of demand. Verdict: Worth a look — 50/100.

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

calcium 500mg market data

Units sold / yr: 15K–20K; avg 1,250–1,500/product
Revenue / yr: $223K–$298K; units × avg price
Conversion rate: 12.2%
Avg BSR: #311
Page quality: 0%
Prime: 100%
Sponsored: 59%
Out of stock: 0.0%
Avg brand age: 84 months
Avg seller age: 152 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 rising

Sellers

117

Top-5 brand share

90%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

Nature Made41%
Nature's Bounty24%
21st Century11%
MAJOR7%
Pure Encapsulations7%
NatureWise5%
Open — no brand owns it (2 brands, 5%)

Demand & seasonality

Weekly Amazon search volume, last 99 weeks — +13.5% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.6×

Open Trend

Top calcium 500mg search terms

calcium 500mg49K/yr +18.1%9.0% conv.
calcium 500mg with vitamin d319K/yr +14.6%12.6% conv.
calcium 500 mg16K/yr +21.4%9.4% conv.
nature made calcium 500 mg with d310K/yr +9.2%15.0% conv.
calcium 5008K/yr +6.9%9.3% conv.
500 mg calcium8K/yr -0.6%8.9% conv.
calcium 500 mg with vitamin d34K/yr +50.2%12.7% conv.
calcium 500 mg only6K/yr +15.4%6.5% conv.
calcium 400 mg4K/yr -0.3%3.7% conv.
nature made calcium 500 mg4K/yr +18.9%12.6% conv.

All search terms

Top calcium 500mg 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 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

Nature's Bounty$15.924.7★7,168 rev

Nature Made Calcium 500 mg With Vitamin D Tablets 130 Count (Pack of 3)

Nature Made$32.094.7★5,823 rev

Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets

Nature Made$13.714.7★27,324 rev

Nature Made Calcium Gummies 500 mg Per Serving with Vitamin D3 Dietary Calcium Supplement for Bone Support 80 Gummies 40 Day Supply

Nature Made$9.824.5★4,462 rev

Major Oyster Shell Calcium 500 mg - Daily Calcium Supplement - 300 Tablets (1-Pack)

MAJOR$11.894.7★775 rev

Newest

by launch date

NatureWise Calcium Citrate 500mg Capsules - Supplement for Bone Health - Easy to Digest & Absorb - Vegan Non-GMO Gluten-Free - 90 Count[30-Day Supply]

NatureWise$13.79403 rev

1y 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$17.72405 rev

3y ago

Pure Encapsulations Calcium (Citrate) - Supplement for Bone Teeth Colon and Cardiovascular Health Support* - with Premium Calcium Citrate - 60 Capsules

Pure Encapsulations$13.275,961 rev

3y ago

THORNE - Calcium - (Formerly DiCalcium Malate) - Chelated Calcium for Enhanced Absorption with DimaCal for Bone Density Support* - 120 Capsules

THORNE$27.06965 rev

9y ago

21st Century Calcium 600 mg Supplement (400 Tablets) Vegan-Friendly Bone Strength Calcium Supplement Non-GMO & Gluten-Free Calcium Carbonate No Artificial Flavors Suitable for Men & Women

21st Century$11.906,539 rev

12y ago

What buyers say about calcium 500mg

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

What buyers love

Calcium20%

“Excellent calcium supplement”

Quality-Overall14%

“always consistent quality”

Value For Money11%

“great value”

Vitamin9%

“Great value and vitamins”

Ease Of Chewing/Swallowing7%

“The best chewable I've bought in last year”

Advertised Vs Actual Product7%

“As advertised”

Ease Of Use4%

“Ease of use”

Taste-Overall4%

“Taste great”

Efficiency2%

“Effective product”

Acid Regulator/Stomach Ache Relief1%

“No stomach upset”

What buyers complain about

Size-Overall9%

“The capsules are to large”

Taste-Overall7%

“Weird taste”

Calcium7%

“Apparently low calcium is a thing”

Sweetness6%

“Way too sugary”

Dosage6%

“Ive tried to take recommended dosage but can barely get one down”

Ease Of Chewing/Swallowing6%

“as I can't swallow that type”

Value For Money5%

“Too pricey”

Acid Regulator/Stomach Ache Relief4%

“Stomach pain”

Texture/Consistency-Overall3%

“Terrible texture”

Vitamin2%

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

Top return reasons

Calcium48%

Ease Of Chewing/Swallowing12%

Vitamin10%

Regulates Digestion3%

Dosage3%

Flavor3%

Weight Heavy3%

Advertised Vs Actual Product3%

Size-Overall3%

Value For Money3%

Common questions

Is calcium 500mg profitable to sell on Amazon United States?: The niche generates $242K/yr across 17 tracked products. 90-day search growth is +13.5%. Flapen's verdict: Worth a look (50/100).
How competitive is the calcium 500mg niche?: 8 brands and 117 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 90% of demand.
What do buyers complain about in calcium 500mg?: Top complaints mined from reviews: Size-Overall, Taste-Overall, Calcium. The return rate is 0.0%.
When does demand for calcium 500mg peak?: Demand is steady year-round — the busiest month runs 1.6× the quietest.
What does it cost to enter the calcium 500mg niche?: Listings span $5.26–$32.09; the average listing price is $14.89 (sweet spot $15–$100). The average incumbent carries 6,168 reviews — the moat a new listing must climb.