---
title: "Vitamin D3 K2 — $31.2M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d3-k2"
last_updated: "2026-08-10T05:09:11.623Z"
locale: en
meta:
description: "Niche score 65/100 · $31.2M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Aug 2026."
"og:description": "Niche score 65/100 · $31.2M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Aug 2026."
"og:title": "Vitamin D3 K2 — $31.2M/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d3 k2**
**Worth a look**
Shows a $31.2M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 100Growth 24Conversion 96Competition 60Returns 100Price range 79Avg price 87Brand share 71Review moat 20Quality gap 18
**Market size**
**Incredible****$31.2M**
$31.2M/yr · 12.2M searches
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.9%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$19.89**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$8.71–$40.07**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-2.1%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****13,095.63**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, vitamin d3 k2 is a $31.2M/yr Amazon United States market (12.2M searches/yr). The top 5 brands hold 62% of demand. Verdict: Worth a look — 65/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d3 k2 market data**
- **Units sold / yr**
- **1.0M–1.0M**
- avg 40,000–50,000/product
- **Revenue / yr**
- **$19.9M–$19.9M**
- units × avg price
- **Conversion rate**
- **12.9%**
- **Avg BSR**
- **#27**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **91%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **53 months**
- **Avg seller age**
- **148 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**20 **▲rising
**Sellers**
**678**
**Top-5 brand share**
**62%**
Top 20: 100%
**Top-5 click share**
**49%**
Top 20: 88%
**Open market**
**31%**
- Sports Research19% - Bronson14% - Micro Ingredients10% - Nature Made10% - Pure Encapsulations10% - Nutricost7%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -2.1% search growth over the last 90 days.
300K200KSpike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d3-k2/trend)
## **Top vitamin d3 k2 search terms**
- **vitamin d3 k2**5.6M/yr-3.9%10.5% conv. - **d3 k2**2.2M/yr+1.1%10.3% conv. - **d3 k2 vitamin 10000 iu**814K/yr-7.6%8.3% conv. - **vitamina d3 con k2**515K/yr+1.0%2.7% conv. - **k2 d3 vitamin supplement**500K/yr-3.6%11.6% conv. - **d3 k2 vitamin 5000 iu**373K/yr+7.1%9.5% conv. - **d3 and k2 supplements**369K/yr-26.4%7.7% conv. - **sports research d3 plus k2**203K/yr+8.7%11.1% conv. - **vitamin d k2**246K/yr-18.4%10.9% conv. - **d3k2**176K/yr+7.1%8.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d3-k2/search-terms)
## **Top vitamin 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%4%$1.2M8%$2.5M12%$3.7M16%$5.0M1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Sports Research Vegan Vitamin D3 + K2 w/Coconut Oil 60 Count Plantgels**Sports Research**$22.12**4.8★54,253 rev](https://www.amazon.com/dp/B07255MPRN) [2**Bronson Vitamin K2 D3 (MK7) Supplement 2-in1 D3 & K2 Complex 60 Capsules**Bronson**$9.68**4.7★40,928 rev](https://www.amazon.com/dp/B0779M341X) [3**Nature Made Vitamin D3 K2 Supplement 30 Softgels**Nature Made**$12.53**4.7★10,717 rev](https://www.amazon.com/dp/B09SR2KX9D) [4**Pure Encapsulations Vitamin D3 & K2 120 Capsules**Pure Encapsulations**$34.10**4.8★5,090 rev](https://www.amazon.com/dp/B0BZ8TMDQ5) [5**Nutricost Vitamin D3 + K2 (5000 IU D3 / 100mcg MK7) 120 Softgels GMO-Free**Nutricost**$13.71**4.8★6,027 rev](https://www.amazon.com/dp/B07K3VFVJC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**BienRaz Vitamin D3 K2 5000IU All-Trans MK-7 100mcg 120 Softgels**BienRaíz**$18.27**268 rev8mo ago](https://www.amazon.com/dp/B0FLNXD4JQ) [**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.29**2,690 rev1y ago](https://www.amazon.com/dp/B0F9F5JWXW) [**Pure Encapsulations Vitamin D3 & K2 60 Capsules**Pure Encapsulations**$19.03**5,090 rev1y ago](https://www.amazon.com/dp/B0F16R7H2W) [**VITBOOST Vitamin D3 K2 Complex - 5000 IU (125 mcg) D3 & K2 (MK-7) 90 mcg**VITBOOST**$9.60**2,706 rev1y ago](https://www.amazon.com/dp/B0DQDDMLXL) [**Vitalitown Vitamin D3 K2 D3 10000 IU K2 (MK7) 200mcg 90 Softgels**Vitalitown**$9.81**3,409 rev1y ago](https://www.amazon.com/dp/B0DFBTP4MR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Micro Ingredients Vitamin D3 K2 MK-7 10 000 IU Per Serving 180 Softgels**Micro Ingredients**$23.20**4.7★**▲ 105%**](https://www.amazon.com/dp/B0D2SRGD76) [**BienRaz Vitamin D3 K2 5000IU All-Trans MK-7 100mcg 120 Softgels**BienRaíz**$18.27**4.8★**▲ 102%**](https://www.amazon.com/dp/B0FLNXD4JQ) [**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.29**4.7★**▲ 81%**](https://www.amazon.com/dp/B0F9F5JWXW) [**VITBOOST Vitamin D3 K2 Complex - 5000 IU (125 mcg) D3 & K2 (MK-7) 90 mcg**VITBOOST**$9.60**4.8★**▲ 50%**](https://www.amazon.com/dp/B0DQDDMLXL) [**Bronson Vitamin K2 D3 (MK7) Extra Strength D3 & K2 Complex 120 Capsules**Bronson**$15.15**4.7★**▲ 49%**](https://www.amazon.com/dp/B08KGW7YKS)
**~~View all trending →~~**
## **What buyers say about vitamin d3 k2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**23%
*“Great vitamin supplement”*
**Quality-Overall**22%
*“Excellent Product”*
**Value For Money**7%
*“Very affordable”*
**Ease Of Chewing/Swallowing**6%
*“Easier to swallow”*
**Advertised Vs Actual Product**4%
*“Arrived as described”*
**Ease Of Use**3%
*“Easy to use”*
**Efficiency**3%
*“Works well”*
**Energy Level**2%
*“lots of energy”*
**Dosage**2%
*“great dosage”*
**Nutritional Content**2%
*“Good Supplement”*
### **What buyers complain about **
**Vitamin**14%
*“Vitamins had a funky smell”*
**Dosage**8%
*“Dosage is too much”*
**Value For Money**6%
*“Too expensive”*
**Taste-Overall**5%
*“Strong fish taste”*
**Size-Overall**4%
*“Super small”*
**Quality-Overall**3%
*“Cheap and makes this product bad”*
**Side Effects**3%
*“Bad side effects”*
**Advertised Vs Actual Product**3%
*“False advertisement”*
**Ingredients-Overall**3%
*“Gross ingredients”*
**Functionality-Overall**2%
*“Not very effective”*
### **Top return reasons **
**Value For Money**33%
**Dosage**20%
**Vitamin**10%
**Functionality-Overall**4%
**Ingredients-Overall**3%
**Hard Feel**2%
**Adhesion/Stickiness**2%
**Quality-Overall**2%
**Certifications**2%
**Dilute/Watery**2%
## **Common questions**
- **Is vitamin d3 k2 profitable to sell on Amazon United States?**
- The niche generates $31.2M/yr across 32 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -2.1%. Flapen's verdict: Worth a look (65/100).
- **How competitive is the vitamin d3 k2 niche?**
- 20 brands and 678 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in vitamin d3 k2?**
- Top complaints mined from reviews: Vitamin, Dosage, Value For Money. The return rate is 0.0%.
- **When does demand for vitamin d3 k2 peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the vitamin d3 k2 niche?**
- Listings span $8.71–$40.07; the average listing price is $19.89 (sweet spot $15–$100). The average incumbent carries 13,096 reviews — the moat a new listing must climb.
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