---
title: "Vitamin D3 K2 Magnesium — $290K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d3-k2-magnesium"
last_updated: "2026-08-09T16:46:54.611Z"
locale: en
meta:
description: "Niche score 48/100 · $290K/yr market · 309K searches/yr · $17.79 avg price. Doesn't clear our bar today. Data updated Aug 2026."
"og:description": "Niche score 48/100 · $290K/yr market · 309K searches/yr · $17.79 avg price. Doesn't clear our bar today. Data updated Aug 2026."
"og:title": "Vitamin D3 K2 Magnesium — $290K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin d3 k2 magnesium**
**Skip it**
Soft demand (-28.5% this quarter) — this niche doesn't clear our bar today.
Market size 51Growth 11Conversion 61Competition 37Returns 100Price range 71Avg price 82Brand share 63Review moat 23Quality gap 20
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$17.79**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$9.38–$29.06**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****67%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Good****5.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$290K**
$290K/yr · 309K searches
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****7,300.35**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-28.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, vitamin d3 k2 magnesium is a $290K/yr Amazon United States market (309K searches/yr). The top 5 brands hold 67% of demand. Demand peaks in Jan–Feb–May. Verdict: Skip it — 48/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin d3 k2 magnesium market data**
- **Units sold / yr**
- **15K–20K**
- avg 750–1,000/product
- **Revenue / yr**
- **$267K–$356K**
- units × avg price
- **Conversion rate**
- **5.3%**
- **Avg BSR**
- **#167**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **152 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**83**
**Top-5 brand share**
**67%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**26%**
- VEV25% - New Elements14% - Bronson12% - Sandhu's8% - Totaria7% - NatureWise6%
## **Demand & seasonality**
Weekly Amazon search volume, last 83 weeks — -28.5% search growth over the last 90 days.
25K15KSpike '25Spike '26Prime Day '26 seasonJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jan, Feb, May · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-d3-k2-magnesium/trend)
## **Top vitamin d3 k2 magnesium search terms**
- **d3 k2 magnesium supplement**30K/yr+31.8%4.5% conv. - **d3 k2 magnesium**59K/yr-56.4%3.9% conv. - **vitamin d3 k2 magnesium**44K/yr-44.5%4.5% conv. - **k2 d3 magnesium vitamin supplement**33K/yr-43.9%5.3% conv. - **vitamin d k2 magnesium**20K/yr-30.0%4.9% conv. - **vitamin d3 k2 magnesium glycinate**12K/yr+3.1%4.1% conv. - **magnesium glycinate d3 k2**11K/yr+25.2%4.5% conv. - **vitamin d with k2 and magnesium**13K/yr-40.6%4.4% conv. - **magnesium d3 k2**10K/yr-13.5%4.1% conv. - **vitamin d3 k2 magnesium zinc**8K/yr+1.7%2.2% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-d3-k2-magnesium/search-terms)
## **Top vitamin d3 k2 magnesium 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%$29K20%$58K30%$87K40%$116K101001K10K100K 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**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.29**4.7★2,690 rev](https://www.amazon.com/dp/B0F9F5JWXW) [2**New Elements Vitamin D3 K2 10 000 IU with Magnesium Glycinate 500mg - Bone Health Immune Support Energy & Mood - Non-GMO Gluten-Free Sugar-Free Softgels for Women & Men (60 softgels)**New Elements**$17.74**4.6★1,549 rev](https://www.amazon.com/dp/B0D799238F) [3**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.38**4.7★178 rev](https://www.amazon.com/dp/B0GNN7HRKC) [4**Vitamin D3 K2 5000 IU 120mcg Magnesium Zinc B6 Quercetin Capsules 120 Count**Sandhu's**$29.06**4.7★1,937 rev](https://www.amazon.com/dp/B0DZQG5YF6) [5**9-in-1 Magnesium Glycinate 500mg + Vitamin D3 5000 IU & K2 Complex - High Absorption - Healthy Stress Sleep Muscle Function Bone Health & Energy Supports | Non-GMO Gluten-Free 120 Softgels**Totaria**$19.77**4.6★450 rev](https://www.amazon.com/dp/B0FLHSW11D)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Toniiq 10 000IU Liposomal Vitamin D3 K2 Magnesium Supplement**Toniiq**$19.29**40 rev2mo ago](https://www.amazon.com/dp/B0GTYZMKT1) [**Vitamin D3 K2 10000 IU Magnesium Supplement - Extra Strength with 10 000 IU Vitamin D3 + K2 MK-7 200 mcg and Magnesium Glycinate Supplements Complex - 300 Softgels**THEREXA**$21.50**88 rev4mo ago](https://www.amazon.com/dp/B0GF24DM1N) [![NatureWise Magnesium Glycinate 550mg + 2000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - [30-Day Supply]](https://m.media-amazon.com/images/I/410SWMUGXEL.jpg)**NatureWise Magnesium Glycinate 550mg + 2000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - \[30-Day Supply\]**NatureWise**$12.25**133 rev5mo ago](https://www.amazon.com/dp/B0GPYNCJTL) [**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.38**178 rev5mo ago](https://www.amazon.com/dp/B0GNN7HRKC) [**JME Core Vitamin D3 K2 10 000 IU Magnesium Supplement Bone & Vascular Health Support - Immune Function Support* with D3 and K2 (MK-7) Magnesium Glycinate & Malate Zinc Citrate -300 Softgels**JME**$20.48**75 rev6mo ago](https://www.amazon.com/dp/B0GL2FJ3QZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Toniiq 10 000IU Liposomal Vitamin D3 K2 Magnesium Supplement**Toniiq**$19.29**4.7★**▲ 346%**](https://www.amazon.com/dp/B0GTYZMKT1) [**JME Core Vitamin D3 K2 10 000 IU Magnesium Supplement Bone & Vascular Health Support - Immune Function Support* with D3 and K2 (MK-7) Magnesium Glycinate & Malate Zinc Citrate -300 Softgels**JME**$20.48**4.8★**▲ 336%**](https://www.amazon.com/dp/B0GL2FJ3QZ) [**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.38**4.7★**▲ 334%**](https://www.amazon.com/dp/B0GNN7HRKC) [![NatureWise Magnesium Glycinate 550mg + 2000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - [30-Day Supply]](https://m.media-amazon.com/images/I/410SWMUGXEL.jpg)**NatureWise Magnesium Glycinate 550mg + 2000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - \[30-Day Supply\]**NatureWise**$12.25**4.6★**▲ 309%**](https://www.amazon.com/dp/B0GPYNCJTL) [**Vitalibre Vitamin D3 K2 10000 IU + Magnesium Glycinate 60 Mini Softgels**Vitalibre**$10.18**4.7★**▲ 154%**](https://www.amazon.com/dp/B0FR9864RV)
**~~View all trending →~~**
## **What buyers say about vitamin d3 k2 magnesium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**21%
*“Best vitamins”*
**Quality-Overall**20%
*“Excellent Quality”*
**Value For Money**6%
*“Great buy”*
**Ease Of Chewing/Swallowing**6%
*“Easy to Swallow”*
**Advertised Vs Actual Product**3%
*“As Advertised”*
**Efficiency**3%
*“Works Well”*
**Sleep Quality**3%
*“Good sleep”*
**Ease Of Use**3%
*“Easy peasy”*
**Energy Level**3%
*“has helped with my energy”*
**Magnesium**3%
*“good quality magnesium supplement”*
### **What buyers complain about **
**Vitamin**11%
*“Bad vitamins”*
**Dosage**11%
*“Dosage is too high”*
**Value For Money**7%
*“Too expensive”*
**Side Effects**4%
*“Beware of side effects”*
**Size-Overall**4%
*“These are small”*
**Magnesium**3%
*“Ineffective Magnesium Supplement”*
**Allergies**2%
*“Can cause allergic reaction”*
**Advertised Vs Actual Product**2%
*“Misleading size”*
**Functionality-Overall**2%
*“no noticeable results”*
**Quality-Overall**2%
*“the quality control on the bottle I received was not there”*
### **Top return reasons **
**Value For Money**36%
**Dosage**15%
**Vitamin**10%
**Magnesium**6%
**Functionality-Overall**6%
**Certifications**4%
**Solubility**3%
**Ingredients-Overall**3%
**Hard Feel**3%
**Color Fading/Discoloration**2%
## **Common questions**
- **Is vitamin d3 k2 magnesium profitable to sell on Amazon United States?**
- The niche generates $290K/yr across 20 tracked products. 8 of 8 products launched in the last 360 days are still selling. 90-day search growth is -28.5%. Flapen's verdict: Skip it (48/100).
- **How competitive is the vitamin d3 k2 magnesium niche?**
- 16 brands and 83 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 67% of demand.
- **What do buyers complain about in vitamin d3 k2 magnesium?**
- Top complaints mined from reviews: Vitamin, Dosage, Value For Money. The return rate is 0.0%.
- **When does demand for vitamin d3 k2 magnesium peak?**
- Demand peaks in Jan–Feb–May; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the vitamin d3 k2 magnesium niche?**
- Listings span $9.38–$29.06; the average listing price is $17.79 (sweet spot $15–$100). The average incumbent carries 7,300 reviews — the moat a new listing must climb.
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