---
title: "Calcium 500mg — $242K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/calcium-500mg"
last_updated: "2026-08-06T19:19:52.066Z"
locale: en
meta:
description: "Niche score 50/100 · $242K/yr market · 134K searches/yr · $14.89 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $242K/yr market · 134K searches/yr · $14.89 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Calcium 500mg — $242K/yr Amazon US Niche (2026) - Flapen"
---
# **calcium 500mg**
**Worth a look**
Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Market size 45Growth 42Conversion 95Competition 32Returns 100Price range 64Avg price 74Brand share 24Review moat 24Quality gap 20
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.2%**
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**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Bad****90%**
top-5 brand share — brand-locked demand
**Review moat**
**Bad****6,167.82**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
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 ~~](https://flapen.com/research/methodology)
## **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**
**5%**
- 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.
3K2KSpike '24Spike '25 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/health-household/calcium-500mg/trend)
## **Top calcium 500mg search terms**
- **calcium 500mg**49K/yr+18.1%9.0% conv. - **calcium 500mg with vitamin d3**19K/yr+14.6%12.6% conv. - **calcium 500 mg**16K/yr+21.4%9.4% conv. - **nature made calcium 500 mg with d3**10K/yr+9.2%15.0% conv. - **calcium 500**8K/yr+6.9%9.3% conv. - **500 mg calcium**8K/yr-0.6%8.9% conv. - **calcium 500 mg with vitamin d3**4K/yr+50.2%12.7% conv. - **calcium 500 mg only**6K/yr+15.4%6.5% conv. - **calcium 400 mg**4K/yr-0.3%3.7% conv. - **nature made calcium 500 mg**4K/yr+18.9%12.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/calcium-500mg/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.
0%10%$24K20%$48K30%$73K40%$97K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Natures Bounty Calcium Plus 400 IU Vitamin D3 Immune Support & Bone Health 300 Tablets**Nature's Bounty**$15.92**4.7★7,168 rev](https://www.amazon.com/dp/B002FHL3DE) [2**Nature Made Calcium 500 mg With Vitamin D Tablets 130 Count (Pack of 3)**Nature Made**$32.09**4.7★5,823 rev](https://www.amazon.com/dp/B00G4EOGWO) [3**Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets**Nature Made**$13.71**4.7★27,324 rev](https://www.amazon.com/dp/B002FH5I0I) [4**Nature Made Calcium Gummies 500 mg Per Serving with Vitamin D3 Dietary Calcium Supplement for Bone Support 80 Gummies 40 Day Supply**Nature Made**$9.82**4.5★4,462 rev](https://www.amazon.com/dp/B008HEZ6TG) [5**Major Oyster Shell Calcium 500 mg - Daily Calcium Supplement - 300 Tablets (1-Pack)**MAJOR**$11.89**4.7★775 rev](https://www.amazon.com/dp/B005TM2FAM)
**~~View all top sellers →~~**
### **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]](https://m.media-amazon.com/images/I/41Vw+Hdvp6L.jpg)**NatureWise Calcium Citrate 500mg Capsules - Supplement for Bone Health - Easy to Digest & Absorb - Vegan Non-GMO Gluten-Free - 90 Count\[30-Day Supply\]**NatureWise**$13.79**403 rev1y ago](https://www.amazon.com/dp/B0DZFNVP7T) [**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**$17.72**405 rev3y ago](https://www.amazon.com/dp/B0BNSN9Y3G) [**Pure Encapsulations Calcium (Citrate) - Supplement for Bone Teeth Colon and Cardiovascular Health Support* - with Premium Calcium Citrate - 60 Capsules**Pure Encapsulations**$13.27**5,961 rev3y ago](https://www.amazon.com/dp/B0BKNL1XDS) [**THORNE - Calcium - (Formerly DiCalcium Malate) - Chelated Calcium for Enhanced Absorption with DimaCal for Bone Density Support* - 120 Capsules**THORNE**$27.06**965 rev9y ago](https://www.amazon.com/dp/B06VVTCHB8) [**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**$11.90**6,539 rev12y ago](https://www.amazon.com/dp/B00M5TZ1F8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support Calcium Supplement for Bone Health 60 Tablets**Nature Made**$6.59**4.7★**▲ 69%**](https://www.amazon.com/dp/B0000DJASB) [**Nature Made Calcium 500 mg With Vitamin D Tablets 130 Count (Pack of 3)**Nature Made**$32.09**4.7★**▲ 55%**](https://www.amazon.com/dp/B00G4EOGWO) [**Natures Bounty Calcium Carbonate & Vitamin D Supports Immune Health & Bone Health 600mg Calcium & 800IU Vitamin D3 250 Tablets**Nature's Bounty**$10.74**4.7★**▲ 53%**](https://www.amazon.com/dp/B0012D38G2) [**Nature Made Calcium 600 mg with Vitamin D3 Dietary Supplement for Bone Support 220 Tablets**Nature Made**$13.71**4.7★**▲ 16%**](https://www.amazon.com/dp/B002FH5I0I) [**Nature Made Calcium 600 mg with Vitamin D3 Dietary Calcium Supplement for Bone Support 100 Softgels**Nature Made**$12.91**4.6★**▲ 14%**](https://www.amazon.com/dp/B001F1DWZS)
**~~View all trending →~~**
## **What buyers say about calcium 500mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Calcium**20%
*“Excellent calcium supplement”*
**Quality-Overall**14%
*“always consistent quality”*
**Value For Money**11%
*“great value”*
**Vitamin**9%
*“Great value and vitamins”*
**Ease Of Chewing/Swallowing**7%
*“The best chewable I've bought in last year”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Ease Of Use**4%
*“Ease of use”*
**Taste-Overall**4%
*“Taste great”*
**Efficiency**2%
*“Effective product”*
**Acid Regulator/Stomach Ache Relief**1%
*“No stomach upset”*
### **What buyers complain about **
**Size-Overall**9%
*“The capsules are to large”*
**Taste-Overall**7%
*“Weird taste”*
**Calcium**7%
*“Apparently low calcium is a thing”*
**Sweetness**6%
*“Way too sugary”*
**Dosage**6%
*“Ive tried to take recommended dosage but can barely get one down”*
**Ease Of Chewing/Swallowing**6%
*“as I can't swallow that type”*
**Value For Money**5%
*“Too pricey”*
**Acid Regulator/Stomach Ache Relief**4%
*“Stomach pain”*
**Texture/Consistency-Overall**3%
*“Terrible texture”*
**Vitamin**2%
*“It would be a great supplement for some just not me”*
### **Top return reasons **
**Calcium**48%
**Ease Of Chewing/Swallowing**12%
**Vitamin**10%
**Regulates Digestion**3%
**Dosage**3%
**Flavor**3%
**Weight Heavy**3%
**Advertised Vs Actual Product**3%
**Size-Overall**3%
**Value For Money**3%
## **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.
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