---
title: "K2 D3 Magnesium — $5K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/k2-d3-magnesium"
last_updated: "2026-08-12T14:51:56.184Z"
locale: en
meta:
description: "Amazon product research for k2 d3 magnesium: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for k2 d3 magnesium: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "K2 D3 Magnesium — $5K/mo Amazon US Product Research (2026)"
---
# **K2 D3 Magnesium**
**Skip it**
A small market ($59K/yr) — this niche doesn't clear our bar today.
Market size 15Growth 22Conversion 61Competition 34Returns 100Price range 77Avg price 82Brand share 43Review moat 27Quality gap 24
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$17.90**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.36–$34.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****5.3%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****79%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****65%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****3,838.96**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-5.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$59K**
$59K/yr · 62K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
## **Is k2 d3 magnesium profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, k2 d3 magnesium is a $59K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 79% of demand. Verdict: Skip it — 43/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **k2 d3 magnesium market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$54K–$72K**
- units × avg price
- **Conversion rate**
- **5.3%**
- **Avg BSR**
- **#347**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **151 days**
## **Competition: brands, sellers & click share**
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**48**
**Top-5 brand share**
**79%**
Top 20: 100%
**Top-5 click share**
**65%**
Top 20: 96%
**Open market**
**17%**
- Totaria18% - New Elements18% - NatureWise16% - VEV15% - Bronson12% - Sandhu's4% - Open — no brand owns it (10 brands, 17%)
## **k2 d3 magnesium demand & seasonality**
Weekly Amazon search volume, last 39 weeks — -5.2% search growth over the last 90 days.
2K2KSpike '26Nov '25Dec '25Jan '26Mar '26Apr '26May '26Jul '26
[**Open Trend **](https://flapen.com/research/us/health-household/k2-d3-magnesium/trend)
## **Top k2 d3 magnesium search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **vitamin d3 k2 magnesium glycinate**12K/yr+0.2%4.0% conv. - **magnesium glycinate d3 k2**11K/yr+19.2%5.5% conv. - **magnesium d3 k2**10K/yr-17.8%4.3% conv. - **d3 k2 magnesium glycinate**6K/yr-13.2%4.0% conv. - **magnesium glycinate with d3 and k2**6K/yr-6.3%5.3% conv. - **magnesium glycinate vitamin d3 k2**6K/yr-1.6%4.3% conv. - **magnesium with d3 and k2**4K/yr-13.9%4.3% conv. - **magnesium k2 d3**4K/yr-11.5%5.0% conv. - **magnesium d3 k2 supplement**3K/yr-24.1%5.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/k2-d3-magnesium/search-terms)
## **Top k2 d3 magnesium products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$3K10%$6K15%$9K20%$12K101001K10K100K 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**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★441 rev](https://www.amazon.com/dp/B0FLHSW11D) [2**VEV Corefeel Vitamin D3 K2 10 000 IU Magnesium Supplement 300 Softgels**VEV**$21.34**4.7★2,552 rev](https://www.amazon.com/dp/B0F9F5JWXW) [3**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**4.6★155 rev](https://www.amazon.com/dp/B0GNN7HRKC) [4![NatureWise Magnesium Glycinate 550mg + High-Dose 10000 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/41R7LVaeHyL.jpg)**NatureWise Magnesium Glycinate 550mg + High-Dose 10000 IU Vitamin D3 K2 100 mcg - D3 K2 Magnesium Supplement - Chelated for High Absorption - Bone Support - Non-GMO USA Manufactured - \[30-Day Supply\]**NatureWise**$14.35**4.6★128 rev](https://www.amazon.com/dp/B0FTZZP7KG) [5**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**$17.71**4.6★1,537 rev](https://www.amazon.com/dp/B0D799238F)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Toniiq 10 000 IU Liposomal Vitamin D3 K2 Magnesium Supplement 200mcg All-Trans MK-7 & 300mg Liposomal Magnesium Glycinate with Zinc & Boron Vegan Third-Party Tested 120 Capsules**Toniiq**$19.26**37 rev2mo ago](https://www.amazon.com/dp/B0GTYZMKT1) [![NatureWise Vitamin D3 K2 Magnesium Glycinate 275mg - Extra Strength Vitamin D3 5000IU + K2 50mcg - High Absorption Chelated Magnesium - Bone Support - Non-GMO USA Manufactured - [90 Day Supply]](https://m.media-amazon.com/images/I/41LZv-Kk-RL.jpg)**NatureWise Vitamin D3 K2 Magnesium Glycinate 275mg - Extra Strength Vitamin D3 5000IU + K2 50mcg - High Absorption Chelated Magnesium - Bone Support - Non-GMO USA Manufactured - \[90 Day Supply\]**NatureWise**$19.43**24 rev3mo ago](https://www.amazon.com/dp/B0GVKV598K) [**Vitamatic Magnesium Glycinate 200 mg (Elemental) with Vitamin D3 5000 IU & K2 200 mcg High Absorption Bone Muscle & Heart Support 180 Veg Capsules Non-GMO Made in USA**Vitamatic**$9.69**32 rev4mo ago](https://www.amazon.com/dp/B0GTRKKX3X) [**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**$21.13**87 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**$12.27**128 rev5mo ago](https://www.amazon.com/dp/B0GPYNCJTL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Toniiq 10 000 IU Liposomal Vitamin D3 K2 Magnesium Supplement 200mcg All-Trans MK-7 & 300mg Liposomal Magnesium Glycinate with Zinc & Boron Vegan Third-Party Tested 120 Capsules**Toniiq**$19.26**4.7★**▲ 269%**](https://www.amazon.com/dp/B0GTYZMKT1) [**Bronson Vitamin K2+D3 Magnesium Glycinate Supplement 60 Capsules**Bronson**$9.36**4.6★**▲ 265%**](https://www.amazon.com/dp/B0GNN7HRKC) [**Vitamatic Magnesium Glycinate 200 mg (Elemental) with Vitamin D3 5000 IU & K2 200 mcg High Absorption Bone Muscle & Heart Support 180 Veg Capsules Non-GMO Made in USA**Vitamatic**$9.69**4.4★**▲ 264%**](https://www.amazon.com/dp/B0GTRKKX3X) [**Vitalibre D3 K2 + Magnesium Supplement 10000 IU Vitamin D3 & 200 mcg K2 with Magnesium Glycinate Bone Teeth Immune & Energy Support High Absorption Non-GMO Easy to Swallow 60 Capsules**Vitalibre**$10.52**4.6★**▲ 262%**](https://www.amazon.com/dp/B0FR97S1NK) [![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**$12.27**4.6★**▲ 238%**](https://www.amazon.com/dp/B0GPYNCJTL)
**~~View all trending →~~**
## **What reviews say buyers love and hate about k2 d3 magnesium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Great quality and exactly as described”*
**Vitamin**19%
*“Best vitamins”*
**Value For Money**6%
*“Great deal”*
**Ease Of Chewing/Swallowing**6%
*“Its easy to consume”*
**Magnesium**4%
*“Great Magnesium supplement”*
**Sleep Quality**4%
*“Better sleep”*
**Ease Of Use**3%
*“Ease of use”*
**Advertised Vs Actual Product**3%
*“As described”*
**Energy Level**3%
*“Boosts energy”*
**Efficiency**2%
*“Works fast”*
### **What buyers complain about **
**Dosage**11%
*“Dosage is too high”*
**Vitamin**8%
*“Bad vitamins”*
**Value For Money**5%
*“A bit overpriced”*
**Magnesium**4%
*“Ineffective Magnesium Supplement”*
**Side Effects**4%
*“Beware of side effects”*
**Size-Overall**4%
*“Small”*
**Taste-Overall**2%
*“it doesnt taste”*
**Allergies**2%
*“I thought I was allergic to something else”*
**Acid Regulator/Stomach Ache Relief**2%
*“Too atrong for my stomach”*
**Sleep Quality**2%
*“Caused insomnia instead of better sleep”*
### **Top return reasons **
**Value For Money**34%
**Magnesium**11%
**Vitamin**9%
**Dosage**8%
**Certifications**5%
**Ingredients-Overall**4%
**Hard Feel**4%
**Solubility**4%
**Color Fading/Discoloration**3%
**Joint Pain**3%
## **Common k2 d3 magnesium questions**
- **Is k2 d3 magnesium profitable to sell on Amazon United States?**
- The niche generates $59K/yr across 24 tracked products. 9 of 12 products launched in the last 360 days are still selling. 90-day search growth is -5.2%. Flapen's verdict: Skip it (43/100).
- **How competitive is the k2 d3 magnesium niche?**
- 16 brands and 48 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 79% of demand.
- **What do buyers complain about in k2 d3 magnesium?**
- Top complaints mined from reviews: Dosage, Vitamin, Value For Money. The return rate is 0.0%.
- **What does it cost to enter the k2 d3 magnesium niche?**
- Listings span $9.36–$34.89; the average listing price is $17.90 (sweet spot $15–$100). The average incumbent carries 3,839 reviews — the moat a new listing must climb.
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