---
title: "Calcium D3 K2 — $304K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/calcium-d3-k2"
last_updated: "2026-08-06T19:59:23.424Z"
locale: en
meta:
description: "Niche score 56/100 · $304K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $304K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Calcium D3 K2 — $304K/yr Amazon US Niche (2026) - Flapen"
---
# **calcium d3 k2**
**Worth a look**
Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 51Growth 24Conversion 62Competition 49Returns 100Price range 82Avg price 95Brand share 74Review moat 44Quality gap 32
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$23.58**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.31–$38.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****60%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Good****5.4%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$304K**
$304K/yr · 238K searches
**Competition**
**Okay****56%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,131.25**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-1.7%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, calcium d3 k2 is a $304K/yr Amazon United States market (238K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 56/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **calcium d3 k2 market data**
- **Units sold / yr**
- **13K–15K**
- avg 500–750/product
- **Revenue / yr**
- **$295K–$354K**
- units × avg price
- **Conversion rate**
- **5.4%**
- **Avg BSR**
- **#243**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **60 months**
- **Avg seller age**
- **150 days**
## **Competition & brand share**
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**19 **▲rising
**Sellers**
**62**
**Top-5 brand share**
**60%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 100%
**Open market**
**35%**
- PrimeMD35% - TAWODIUM9% - Nature Made6% - Vitamatic6% - Vitalitown5% - Pure Encapsulations5%
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — -1.7% search growth over the last 90 days.
6K4KSpike '24Spike '25Prime Day '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: May, Jun · busiest ÷ quietest = 2.6×
[**Open Trend **](https://flapen.com/research/us/health-household/calcium-d3-k2/trend)
## **Top calcium d3 k2 search terms**
- **calcium d3 k2**31K/yr+4.2%3.1% conv. - **calcium d3 k2 b12**21K/yr+0.1%6.0% conv. - **calcium with d3 and k2**21K/yr-16.1%4.5% conv. - **calcio d3 k2 b12**9K/yr+24.7%1.7% conv. - **calcium with vitamin d3 and k2**10K/yr+34.1%4.4% conv. - **calcium k2**12K/yr+11.2%2.3% conv. - **balancer calcium d3 k2 b12**14K/yr-60.2%1.3% conv. - **calcium with k2**11K/yr-25.2%3.7% conv. - **calcium k2 d3**7K/yr+71.2%2.3% conv. - **vitamin d3 k2 calcium magnesium**9K/yr+3.4%1.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/calcium-d3-k2/search-terms)
## **Top calcium d3 k2 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%$30K20%$61K30%$91K40%$121K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**4-in-1 Calcium Supplements for Women & Men - Calcium Citrate with D3 K2 Vitamin 5000 IU - Calcium 600mg with Vitamin D3 K2 - Everyday Vitality Supplement - Vegan-Friendly Gluten-Free (120 Capsules)**PrimeMD**$23.82**4.7★3,929 rev](https://www.amazon.com/dp/B097TFPQRM) [2**TAWODIUM Nutriview Calcium D3 + K2 + B12 Softgels 2000mg Suplemento De Calcio Glucosamina + Condroitin Added Strengthen Bones and Teeth Boost Energy Vegen Non-GMO 120 Capsules (1)**TAWODIUM**$31.65**4.5★89 rev](https://www.amazon.com/dp/B0GT56JPT7) [3**4-in-1 Calcium 1200 mg with Vitamin D3 K2 - Extra Strength Calcium Supplements for Women & Men with D3 K2 Vitamin 5000 IU - Everyday Vitality Supplement - Vegan-Friendly Gluten-Free Non-GMO (120ct)**PrimeMD**$26.59**4.6★716 rev](https://www.amazon.com/dp/B0CZ3P97BH) [4**Nature Made Calcium 300 Tablets 750 MG with D3&K**Nature Made**$26.68**4.7★595 rev](https://www.amazon.com/dp/B000UXI3EC) [5**Vitamatic Calcium Supplement 1200mg with D3 K2 & B12 Immune & Bone Health Support - 365 Coated Tablets**Vitamatic**$19.60**4.5★429 rev](https://www.amazon.com/dp/B0DH37ZK3S)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GraviGlow Calcio D3 K2 B12 Softgels Calcium 2000mg with d3 & k2 Suplemento de Calcio Strengthen Bones and Teeth Boost Energy Non-GMO 120 Softgels**GraviGlow**$32.43**8 rev2mo ago](https://www.amazon.com/dp/B0H2M4368X) [**TAWODIUM Nutriview Calcium D3 + K2 + B12 Softgels 2000mg Suplemento De Calcio Glucosamina + Condroitin Added Strengthen Bones and Teeth Boost Energy Vegen Non-GMO 120 Capsules (1)**TAWODIUM**$31.65**89 rev4mo ago](https://www.amazon.com/dp/B0GT56JPT7) [**Vitalitown Vitamin D3 K2 Calcium 1200 mg Vitamin D3 5000 IU High Potency Bone Strength Teeth & Immune System Support Maximum Absorption Easily Absorbable for Women & Men 60 Tablets**Vitalitown**$10.31**97 rev8mo ago](https://www.amazon.com/dp/B0FKGZXJWT) [**Calcium Supplements for Women - Calcium 1200 mg with Vitamin D3 & K2 - High Absorption Extra Strength Calcium Citrate for Bone Health Strength Density Muscle Heart Support - Slow Release Non-GMO**JINGYAT**$19.71**293 rev1y ago](https://www.amazon.com/dp/B0FGXHD7JH) [**NATURE TARGET Vitamin D3 K2 with Calcium & Magnesium - Max Strength 4 in 1 Formula for Bone Heart & Immune Support - Supplies 5000 IU Vitamin D3 & 120 mcg of Vitamin K2 120 Count**NATURE TARGET**$12.12**344 rev1y ago](https://www.amazon.com/dp/B0F299KWX9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GraviGlow Calcio D3 K2 B12 Softgels Calcium 2000mg with d3 & k2 Suplemento de Calcio Strengthen Bones and Teeth Boost Energy Non-GMO 120 Softgels**GraviGlow**$32.43**4.2★**▲ 273%**](https://www.amazon.com/dp/B0H2M4368X) [**TAWODIUM Nutriview Calcium D3 + K2 + B12 Softgels 2000mg Suplemento De Calcio Glucosamina + Condroitin Added Strengthen Bones and Teeth Boost Energy Vegen Non-GMO 120 Capsules (1)**TAWODIUM**$31.65**4.5★**▲ 83%**](https://www.amazon.com/dp/B0GT56JPT7) [**Nature Made Calcium 300 Tablets 750 MG with D3&K**Nature Made**$26.68**4.7★**▲ 61%**](https://www.amazon.com/dp/B000UXI3EC) [**Vitamatic Calcium Supplement 1200mg with D3 K2 & B12 Immune & Bone Health Support - 365 Coated Tablets**Vitamatic**$19.60**4.5★**▲ 36%**](https://www.amazon.com/dp/B0DH37ZK3S) [**Vitalitown Vitamin D3 K2 Calcium 1200 mg Vitamin D3 5000 IU High Potency Bone Strength Teeth & Immune System Support Maximum Absorption Easily Absorbable for Women & Men 60 Tablets**Vitalitown**$10.31**4.6★**▲ 24%**](https://www.amazon.com/dp/B0FKGZXJWT)
**~~View all trending →~~**
## **What buyers say about calcium d3 k2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Calcium**19%
*“Best Calcium”*
**Quality-Overall**16%
*“Trusted and reliable product”*
**Vitamin**15%
*“Decent vitamin”*
**Ease Of Chewing/Swallowing**8%
*“Easily chewed and pleasant flavor”*
**Advertised Vs Actual Product**5%
*“Accurate description”*
**Value For Money**5%
*“Good value”*
**Nutritional Content**3%
*“helps with overall health”*
**Ease Of Use**2%
*“easy too use”*
**Dosage**2%
*“Good dosage”*
**Efficiency**2%
*“Very effective product”*
### **What buyers complain about **
**Taste-Overall**9%
*“Chemical taste”*
**Smell**9%
*“Odd Smell”*
**Calcium**8%
*“Needed a good calcium supplement”*
**Size-Overall**8%
*“Tablets too big”*
**Vitamin**6%
*“Much needed vitamin”*
**Dosage**6%
*“Low dose”*
**Ease Of Chewing/Swallowing**4%
*“I do not like swallowing capsules”*
**Ingredients-Overall**3%
*“Crazy scary highway levels of these, its ridiculous, if youre taking two of these companies supplements youre likely overdosing massively because of their insanely high levels and overlap across their products”*
**Side Effects**3%
*“I had a horrible reaction”*
**Quality-Overall**3%
*“I believe that says a lot about the potential quality control of this product”*
### **Top return reasons **
**Calcium**21%
**Dosage**14%
**Magnesium**7%
**Ingredients-Overall**7%
**Vitamin**7%
**Acid Regulator/Stomach Ache Relief**7%
**Product Condition**7%
**Size-Overall**7%
**Smell**7%
**Joint Pain**7%
## **Common questions**
- **Is calcium d3 k2 profitable to sell on Amazon United States?**
- The niche generates $304K/yr across 20 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -1.7%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the calcium d3 k2 niche?**
- 19 brands and 62 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 60% of demand.
- **What do buyers complain about in calcium d3 k2?**
- Top complaints mined from reviews: Taste-Overall, Smell, Calcium. The return rate is 0.0%.
- **When does demand for calcium d3 k2 peak?**
- Demand peaks in May–Jun; the busiest month runs 2.6× the quietest.
- **What does it cost to enter the calcium d3 k2 niche?**
- Listings span $10.31–$38.79; the average listing price is $23.58 (sweet spot $15–$100). The average incumbent carries 2,131 reviews — the moat a new listing must climb.
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