---
title: "Cal Mag Supplement — $38K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/cal-mag-supplement"
last_updated: "2026-08-07T09:19:10.362Z"
locale: en
meta:
description: "Niche score 54/100 · $38K/yr market · 20K searches/yr · $22.49 avg price. A small market ($38K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $38K/yr market · 20K searches/yr · $22.49 avg price. A small market ($38K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Cal Mag Supplement — $38K/yr Amazon US Niche (2026) - Flapen"
---
# **cal mag supplement**
**Worth a look**
Shows low returns (0.0%), but a small market ($38K/yr) keeps it on the watch list.
Market size 10Growth 43Conversion 81Competition 62Returns 100Price range 78Avg price 94Brand share 62Review moat 26Quality gap 24
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$22.49**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****8.4%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$5.33–$51.04**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****48%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****68%**
top-5 brand share — brands hold most of the demand
**Growth**
**Okay****+14.2%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****3,923.87**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$38K**
$38K/yr · 20K searches
According to Flapen's Amazon United States niche tracking, cal mag supplement is a $38K/yr Amazon United States market (20K searches/yr). The top 5 brands hold 68% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **cal mag supplement market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$34K–$45K**
- units × avg price
- **Conversion rate**
- **8.4%**
- **Avg BSR**
- **#394**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **80%**
- **Out of stock**
- **5.0%**
- **Avg brand age**
- **125 months**
- **Avg seller age**
- **160 days**
## **Competition & brand share**
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▲rising
**Sellers**
**626**
**Top-5 brand share**
**68%**
Top 20: 100%
**Top-5 click share**
**48%**
Top 20: 90%
**Open market**
**26%**
- NOW Foods31% - SOLARAY11% - Pure Encapsulations11% - Nature Made8% - 365 by Whole Foods Market7% - Country Life6%
## **Demand & seasonality**
Weekly Amazon search volume, last 103 weeks — +14.2% search growth over the last 90 days.
600400Black Friday '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/health-household/cal-mag-supplement/trend)
## **Top cal mag supplement search terms**
- **cal mag supplement**13K/yr+22.4%6.9% conv. - **calmag supplement**5K/yr-3.5%6.9% conv. - **cal-mag supplement**2K/yr+11.3%6.1% conv. [**All search terms **](https://flapen.com/research/us/health-household/cal-mag-supplement/search-terms)
## **Top cal mag supplement 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%$2K8%$3K12%$5K16%$6K1001K10K100K 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**NOW Foods Supplements Calcium & Magnesium 2:1 Ratio High Potency Supports Bone Health* 250 Tablets**NOW Foods**$17.85**4.6★6,215 rev](https://www.amazon.com/dp/B00028LZ9A) [2**NOW Supplements Cal-Mag Caps with Vitamin D and Supporting Minerals Supports Bone Health* 240 Veg Capsules**NOW Foods**$19.53**4.8★546 rev](https://www.amazon.com/dp/B0013OVY1G) [3**Pure Encapsulations Cal/Mag (Malate) 2:1 - Calcium & Magnesium (Malate) - Bone Health Supplement* - Optimal Absorption - Vegan & Gluten Free - 180 Capsules**Pure Encapsulations**$36.95**4.7★541 rev](https://www.amazon.com/dp/B004GY1ZA0) [4**Nature Made Calcium Magnesium Zinc with Vitamin D3 Dietary Calcium Supplement for Bone Support 300 Tablets**Nature Made**$11.13**4.8★20,083 rev](https://www.amazon.com/dp/B000OD1F7U) [5**SOLARAY Calcium Magnesium Zinc Supplement - with Calcium 1000mg Magnesium 500mg - Bone Health Muscle Function Heart Health and Immune Support - Vegan 60 Day Guarantee 68 Servings 275 VegCaps**SOLARAY**$23.64**4.7★5,864 rev](https://www.amazon.com/dp/B07T3PGKQP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Qunol Calcium Magnesium Zinc 3-in-1 Tablet Immune System Support 270ct**Qunol**$18.10**3,832 rev3y ago](https://www.amazon.com/dp/B0CCK411P5) [**Nutricost Calcium & Magnesium Carbonate 240 Tablets 60 Servings GMO-Free**Nutricost**$14.80**298 rev5y ago](https://www.amazon.com/dp/B0989HPNQF) [**SOLARAY Calcium Magnesium Zinc Supplement - with Calcium 1000mg Magnesium 500mg - Bone Health Muscle Function Heart Health and Immune Support - Vegan 60 Day Guarantee 68 Servings 275 VegCaps**SOLARAY**$23.64**5,864 rev7y ago](https://www.amazon.com/dp/B07T3PGKQP) [**CalMag Plus Calcium Magnesium Powder for Sleep & Calm Orange Flavor**Whole Family Naturals**$27.15**383 rev8y ago](https://www.amazon.com/dp/B07DF7P18R) [**CalMag Plus Calcium Magnesium Powder for Calm Sleep & Muscle Support**Whole Family Naturals**$27.10**1,157 rev8y ago](https://www.amazon.com/dp/B01L6NNR2W)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer (32 oz)**Bloom City**$17.56**4.7★**▲ 133%**](https://www.amazon.com/dp/B073ZNQWCM) [**Qunol Calcium Magnesium Zinc 3-in-1 Tablet Immune System Support 270ct**Qunol**$18.10**4.6★**▲ 83%**](https://www.amazon.com/dp/B0CCK411P5) [**Natures Answer Marine Based Calcium Magnesium Super Concentrated 500mg | Plant Based | Red Algae & Seawater Derived | Alcohol-Free & Gluten-Free | Vegetarian Capsules 120ct**Nature's Answer**$26.85**4.6★**▲ 73%**](https://www.amazon.com/dp/B01DMVIZUA) [**Country Life Target-Mins Calcium Magnesium with Vitamin D 240 Capsules**Country Life**$25.94**4.7★**▲ 71%**](https://www.amazon.com/dp/B00117ZTNY) [**Botanicare Cal-Mag Plus A Calcium Magnesium And Iron Plant Supplement Corrects Common Plant Deficiencies Add To Water Or Use As A Spray 2-0-0 NPK Quart**Botanicare**$18.40**4.7★**▲ 65%**](https://www.amazon.com/dp/B004JKBMRW)
**~~View all trending →~~**
## **What buyers say about cal mag supplement**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**22%
*“Reliable quality and consistent results”*
**Vitamin**12%
*“Best vitamins ever”*
**Value For Money**10%
*“Great value”*
**Ease Of Chewing/Swallowing**5%
*“This is the best for me because easy swallowing”*
**Calcium**5%
*“A Good Calcium”*
**Magnesium**3%
*“It improved my magnesium levels tremendously”*
**Plant Growth**3%
*“Great all around plant nutrient that helps plants stay green and healthy”*
**Joint Pain**3%
*“Very good for fibromyalgia and osteoporosis”*
**Sleep Quality**3%
*“They help me sleep”*
**Advertised Vs Actual Product**3%
*“As advertised”*
### **What buyers complain about **
**Size-Overall**13%
*“Very large”*
**Dosage**8%
*“Content of each is very low per dosage compared to other brands at the same cost”*
**Ease Of Chewing/Swallowing**8%
*“Wasnt swallow”*
**Calcium**6%
*“It is not 100% Calcium Citrate”*
**Magnesium**4%
*“The doctor found my magnesium was low”*
**Vitamin**4%
*“I cant take theses huge vitamins”*
**Quality-Overall**3%
*“Very bad batch here”*
**Functionality-Overall**3%
*“Didnt work for me”*
**Absorbency**3%
*“but also not easily absorbable by humans”*
**Value For Money**2%
*“It's REALLY expensive”*
### **Top return reasons **
**Leak-Proof**24%
**Value For Money**19%
**Advertised Vs Actual Product**15%
**Size-Overall**7%
**Functionality-Overall**6%
**Defective Material/Parts**4%
**Magnesium**3%
**Ease Of Use**3%
**Plant Growth**3%
**Smell**1%
## **Common questions**
- **Is cal mag supplement profitable to sell on Amazon United States?**
- The niche generates $38K/yr across 30 tracked products. 90-day search growth is +14.2%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the cal mag supplement niche?**
- 17 brands and 626 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 68% of demand.
- **What do buyers complain about in cal mag supplement?**
- Top complaints mined from reviews: Size-Overall, Dosage, Ease Of Chewing/Swallowing. The return rate is 0.0%.
- **When does demand for cal mag supplement peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the cal mag supplement niche?**
- Listings span $5.33–$51.04; the average listing price is $22.49 (sweet spot $15–$100). The average incumbent carries 3,924 reviews — the moat a new listing must climb.
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