---
title: "Magnesium 500mg — $16K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/magnesium-500mg"
last_updated: "2026-08-12T16:25:26.499Z"
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description: "Amazon product research for magnesium 500mg: $16K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for magnesium 500mg: $16K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Magnesium 500mg — $16K/mo Amazon US Product Research (2026)"
---
# **Magnesium 500mg**
**Skip it**
Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.
Market size 38Growth 39Conversion 92Competition 8Returns 100Price range 22Avg price 42Brand share 7Review moat 10Quality gap 20
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****11.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Okay****$10.99**
avg listing price — sweet spot $15–$100
**Growth**
**Okay****+11.1%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****$193K**
$193K/yr · 155K searches
**Price range**
**Bad****$5.55–$17.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****32,418.38**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****97%**
top-5 brand share — brand-locked demand
## **Is magnesium 500mg profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, magnesium 500mg is a $193K/yr Amazon United States market (155K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Jan–Feb–Mar–Sep–Oct–Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **magnesium 500mg market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **25K–30K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **$275K–$330K**
- units × avg price
- **Conversion rate**
- **11.3%**
- **Avg BSR**
- **#171**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **88%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **65 months**
- **Avg seller age**
- **141 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **▲rising
**Sellers**
**37**
**Top-5 brand share**
**97%**
Top 20: 100%
**Top-5 click share**
**90%**
Top 20: 100%
**Open market**
**0%**
- Nature's Bounty80% - Horbäach5% - Life Extension4% - Bronson4% - NatureBell3% - Nobi Nutrition3%
## **magnesium 500mg demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +11.1% search growth over the last 90 days.
300K200KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar, Sep, Oct, Nov, Dec · busiest ÷ quietest = 55.1×
[**Open Trend **](https://flapen.com/research/us/health-household/magnesium-500mg/trend)
## **Top magnesium 500mg search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **magnesium 500mg**61K/yr-0.6%15.3% conv. - **magnesium 500 mg**24K/yr+3.9%12.0% conv. - **magnesium 500**21K/yr+25.0%9.7% conv. - **500 mg magnesium**12K/yr+33.2%8.4% conv. - **magnesium 500 mg tablets**12K/yr+19.6%9.4% conv. - **magnesium 500mg capsules**9K/yr+33.1%7.3% conv. - **magnesium supplement 500 mg**5K/yr+101.1%0.9% conv. - **magnesio 500mg**5K/yr-5.2%7.0% conv. - **500mg magnesium**3K/yr+3.8%14.9% conv. - **magnesium tablets 500mg**2K/yr-12.3%13.4% conv. [**All search terms **](https://flapen.com/research/us/health-household/magnesium-500mg/search-terms)
## **Top magnesium 500mg 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%15%$29K30%$58K45%$87K60%$116K1K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Natures Bounty Magnesium 500 mg Tablets High Potency Magnesium Supplement for Bone & Muscle Health Whole Body Support 200 Count (Pack of 1)**Nature's Bounty**$8.74**4.7★105,290 rev](https://www.amazon.com/dp/B00H5PJ0HW) [2**Natures Bounty Magnesium Supplements 500mg Tablets Support Bone & Muscle Health 200 Count (Pack of 2)**Nature's Bounty**$16.23**4.7★105,290 rev](https://www.amazon.com/dp/B08C65K2WC) [3**Natures Bounty Magnesium Mineral Supplement Supports Bone and Muscle Health 500 mg Coated Tablets 100 Count**Nature's Bounty**$5.55**4.7★1,640 rev](https://www.amazon.com/dp/B0009F3NUA) [4**Horbach Magnesium 500mg | 180 Caplets**Horbäach**$6.19**4.6★2,722 rev](https://www.amazon.com/dp/B0B8T57N76) [5**Life Extension Magnesium Caps 500 mg Magnesium Oxide Citrate and Succinate Heart Health Healthy Bones Metabolism Support 100 Vegetarian Capsules**Life Extension**$8.38**4.7★16,772 rev](https://www.amazon.com/dp/B00A7HDABW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Natures Bounty Magnesium Supplements 500mg Tablets Support Bone & Muscle Health 200 Count (Pack of 2)**Nature's Bounty**$16.23**105,290 rev8mo ago](https://www.amazon.com/dp/B08C65K2WC) [**Magnesium Glycinate 500mg | High Absorption | Sleep Muscle Bone Heart Health & Relaxation Support for Women & Men | Chelated Mag Glycinate | Magnesium Supplement | Vegan & Non-GMO | 120 Capsules**Nobi Nutrition**$15.15**6,787 rev2y ago](https://www.amazon.com/dp/B0CWM5K6W6) [**Bronson Magnesium 500 MG Supports Bone & Muscle Health & Nervous System Support - Non-GMO 120 Vegetarian Tablets**Bronson**$9.99**1,168 rev2y ago](https://www.amazon.com/dp/B0CT5Y1WRY) [**Naturebell Pure Magnesium Glycinate 500mg 240 Veggie Capsules | 100% Chelated & Purified 3rd Party Tested Vegan Friendly Non-GMO Filler Free**NatureBell**$17.66**19,678 rev3y ago](https://www.amazon.com/dp/B0C88BJYX2) [**Horbach Magnesium 500mg | 180 Caplets**Horbäach**$6.19**2,722 rev3y ago](https://www.amazon.com/dp/B0B8T57N76)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Magnesium Glycinate 500mg | High Absorption | Sleep Muscle Bone Heart Health & Relaxation Support for Women & Men | Chelated Mag Glycinate | Magnesium Supplement | Vegan & Non-GMO | 120 Capsules**Nobi Nutrition**$15.15**4.6★**▲ 109%**](https://www.amazon.com/dp/B0CWM5K6W6) [**Bronson Magnesium 500 MG Supports Bone & Muscle Health & Nervous System Support - Non-GMO 120 Vegetarian Tablets**Bronson**$9.99**4.7★**▲ 26%**](https://www.amazon.com/dp/B0CT5Y1WRY) [**Natures Bounty Magnesium Supplements 500mg Tablets Support Bone & Muscle Health 200 Count (Pack of 2)**Nature's Bounty**$16.23**4.7★**— 3%**](https://www.amazon.com/dp/B08C65K2WC) [**Naturebell Pure Magnesium Glycinate 500mg 240 Veggie Capsules | 100% Chelated & Purified 3rd Party Tested Vegan Friendly Non-GMO Filler Free**NatureBell**$17.66**4.7★**— 1%**](https://www.amazon.com/dp/B0C88BJYX2) [**Natures Bounty Magnesium 500 mg Tablets High Potency Magnesium Supplement for Bone & Muscle Health Whole Body Support 200 Count (Pack of 1)**Nature's Bounty**$8.74**4.7★**— 1%**](https://www.amazon.com/dp/B00H5PJ0HW)
**~~View all trending →~~**
## **What reviews say buyers love and hate about magnesium 500mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**16%
*“Helps with sleep”*
**Quality-Overall**16%
*“Good quality and reliable brand”*
**Value For Money**13%
*“Best Price”*
**Magnesium**12%
*“Best magnesium ever”*
**Vitamin**5%
*“Good vitamin”*
**Advertised Vs Actual Product**5%
*“AS advertised”*
**Muscle Pain Relief**4%
*“Relaxes my muscles”*
**Ease Of Chewing/Swallowing**3%
*“Ez to swallow”*
**Efficiency**2%
*“Do the work”*
**Dosage**2%
*“Easy to take capsules”*
### **What buyers complain about **
**Magnesium**15%
*“This is not magnesium glycinate”*
**Dosage**13%
*“Misleading 500mg label/dosage”*
**Sleep Quality**7%
*“Didnt help me sleep”*
**Advertised Vs Actual Product**6%
*“Extremely misleading description”*
**Functionality-Overall**5%
*“Didn't work for me”*
**Side Effects**5%
*“Side effects”*
**Acid Regulator/Stomach Ache Relief**3%
*“Hard on my stomach”*
**Size-Overall**3%
*“Large”*
**Allergies**3%
*“Allergic reaction”*
**Ease Of Chewing/Swallowing**2%
*“Hard to swallow”*
### **Top return reasons **
**Magnesium**40%
**Dosage**16%
**Value For Money**9%
**Sleep Quality**7%
**Advertised Vs Actual Product**6%
**Functionality-Overall**4%
**Ease Of Chewing/Swallowing**3%
**Smell**3%
**Ingredients-Overall**3%
**Minerals**3%
## **Common magnesium 500mg questions**
- **Is magnesium 500mg profitable to sell on Amazon United States?**
- The niche generates $193K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +11.1%. Flapen's verdict: Skip it (38/100).
- **How competitive is the magnesium 500mg niche?**
- 6 brands and 37 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 97% of demand.
- **What do buyers complain about in magnesium 500mg?**
- Top complaints mined from reviews: Magnesium, Dosage, Sleep Quality. The return rate is 0.0%.
- **When does demand for magnesium 500mg peak?**
- Demand peaks in Jan–Feb–Mar–Sep–Oct–Nov–Dec; the busiest month runs 55.1× the quietest.
- **What does it cost to enter the magnesium 500mg niche?**
- Listings span $5.55–$17.66; the average listing price is $10.99 (sweet spot $15–$100). The average incumbent carries 32,418 reviews — the moat a new listing must climb.
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