---
title: "Mag — £292K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/mag"
last_updated: "2026-07-31T21:09:21.276Z"
locale: en
meta:
description: "Niche score 39/100 · £292K/yr market · 224K searches/yr · £8.26 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · £292K/yr market · 224K searches/yr · £8.26 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Mag — £292K/yr Amazon UK Niche (2026) - Flapen"
---
# **mag**
**Skip it**
Prices mostly outside the sweet spot ($3.44–$14.56) — this niche doesn't clear our bar today.
Market size 51Growth 7Conversion 97Competition 15Returns 100Price range 0Avg price 23Brand share 20Review moat 23Quality gap 38
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****15.8%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£292K**
£292K/yr · 224K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****8,263**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£8.26**
avg listing price — sweet spot $15–$100
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-36.3%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£3.44–£14.56**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, mag is a £292K/yr Amazon United Kingdom market (224K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 39/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mag market data**
- **Units sold / yr**
- **30K–40K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **£248K–£330K**
- units × avg price
- **Conversion rate**
- **15.8%**
- **Avg BSR**
- **#22**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **164 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▼falling
**Sellers**
**44**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**5%**
- VitaBright36% - Vitabiotics Ultra27% - Nobi Nutrition13% - Zipvit8% - Nutrition Geeks8% - SMNutrition3% - Open — no brand owns it (3 brands, 5%)
## **Demand**
Weekly Amazon search volume, last 21 weeks — -36.3% search growth over the last 90 days.
6K4KMar '26Mar '26Apr '26May '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/mag/trend)
## **Top mag search terms**
- **magnesium glycinate 400mg**43K/yr-39.7%9.3% conv. - **vitabright magnesium glycinate**27K/yr-31.5%19.2% conv. - **vitabiotics magnesium**34K/yr-49.7%18.9% conv. - **tablet magnesium**9K/yr-19.5%8.8% conv. - **magnesium 6 in 1 complex**12K/yr-23.9%15.4% conv. - **ultra magnesium**8K/yr+7.3%19.0% conv. - **magnesium glycinate and zinc**8K/yr-18.2%2.6% conv. - **magnesium 400mg**8K/yr-41.8%6.4% conv. - **pro magnesium 4**6K/yr-39.4%6.3% conv. - **magnesium 500mg**5K/yr-20.4%10.4% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/mag/search-terms)
## **Top mag 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%£88K40%£117K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Magnesium Supplements Tablets**Vitabiotics Ultra**£3.44**4.6★5,535 rev](https://www.amazon.co.uk/dp/B00LNDGDDG) [2**VitaBright Magnesium Glycinate Supplements | 180 Capsules | 1500mg 300mg Elemental Mg | High Strength Chelated Magnesium Bisglycinate for Adults | Tablets for Nerves & Psychological Support**VitaBright**£14.56**4.6★4,507 rev](https://www.amazon.co.uk/dp/B0BW15L9W1) [3**VitaBright Magnesium Glycinate Complex 6-in-1 | 2500mg 485mg Elemental | 120 Caps | Glycinate Tablets Zinc Vitamin B6 & D | High Strength Magnesium Supplements for Women | ZMA Supplements for Men**VitaBright**£8.01**4.6★2,454 rev](https://www.amazon.co.uk/dp/B0CV7SCS84) [4**Magnesium Glycinate 400mg | Chelated Bisglycinate for Muscle Relaxation Bones Heart Nerve Rest & Calm Support for Women & Men | High Absorption Magnesium Chelate Supplement | 120 Capsules**Nobi Nutrition**£10.64**4.4★3,814 rev](https://www.amazon.co.uk/dp/B0CCVWW85M) [5**Magnesium Glycinate 3-in-1 Complex - 1800mg Supplements as Bisglycinate Citrate & Malate 90 Vegan Capsules Triple High Absorption 384mg Elemental UK Made**Nutrition Geeks**£8.11**4.5★35,795 rev](https://www.amazon.co.uk/dp/B0C9VVCL12)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Magnesium Glycinate 400mg | Chelated Magnesium Glycinate for Maximum Absorption & Bioavailability | Calm Relaxation Muscle Health & Energy Support Supplement | Resealable Eco Pack | 60 Capsules**SMNutrition**£7.49**31 rev11mo ago](https://www.amazon.co.uk/dp/B0FP5QC2ZS) [**Magnesium Glycinate 4-in-1 Complex - 400mg Elemental Mg - 180 Capsules**WeightWorld**£9.37**3,717 rev1y ago](https://www.amazon.co.uk/dp/B0DZY117M6) [**VitaBright Magnesium Glycinate Complex 6-in-1 | 2500mg 485mg Elemental | 120 Caps | Glycinate Tablets Zinc Vitamin B6 & D | High Strength Magnesium Supplements for Women | ZMA Supplements for Men**VitaBright**£8.01**2,454 rev2y ago](https://www.amazon.co.uk/dp/B0CV7SCS84) [**Magnesium Glycinate 400mg | Chelated Bisglycinate for Muscle Relaxation Bones Heart Nerve Rest & Calm Support for Women & Men | High Absorption Magnesium Chelate Supplement | 120 Capsules**Nobi Nutrition**£10.64**3,814 rev2y ago](https://www.amazon.co.uk/dp/B0CCVWW85M) [**Zipvit Magnesium Glycinate 2000mg with 400mg Elemental Plus Vitamin B6 120 Vegan Tablets High Strength Magnesium Supplements**Zipvit**£7.91**2,240 rev2y ago](https://www.amazon.co.uk/dp/B0CCSPDBWC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Magnesium Glycinate 400mg | Chelated Magnesium Glycinate for Maximum Absorption & Bioavailability | Calm Relaxation Muscle Health & Energy Support Supplement | Resealable Eco Pack | 60 Capsules**SMNutrition**£7.49**4.3★**▲ 337%**](https://www.amazon.co.uk/dp/B0FP5QC2ZS) [**Magnesium Citrate Capsules 1480mg | 444mg Elemental | 4 Months | Electrolytes & Hydration - Regular Daily Use | Magnesium Supplements for Women & Men | Not Powder or Tablets | VitaBright**VitaBright**£12.88**4.5★**▲ 54%**](https://www.amazon.co.uk/dp/B07VGG81ZB) [**Zipvit Magnesium Glycinate 2000mg with 400mg Elemental Plus Vitamin B6 120 Vegan Tablets High Strength Magnesium Supplements**Zipvit**£7.91**4.6★**▲ 17%**](https://www.amazon.co.uk/dp/B0CCSPDBWC) [**VitaBright Magnesium Glycinate Supplements | 180 Capsules | 1500mg 300mg Elemental Mg | High Strength Chelated Magnesium Bisglycinate for Adults | Tablets for Nerves & Psychological Support**VitaBright**£14.56**4.6★**— 4%**](https://www.amazon.co.uk/dp/B0BW15L9W1) [**Magnesium Glycinate 400mg | Chelated Bisglycinate for Muscle Relaxation Bones Heart Nerve Rest & Calm Support for Women & Men | High Absorption Magnesium Chelate Supplement | 120 Capsules**Nobi Nutrition**£10.64**4.4★**— 4%**](https://www.amazon.co.uk/dp/B0CCVWW85M)
**~~View all trending →~~**
## **What buyers say about mag**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**25%
*“sleep more deeply”*
**Quality-Overall**16%
*“the quality is always consistent”*
**Magnesium**10%
*“Best magnesium out there”*
**Value For Money**10%
*“EXCELLENT VALUE FOR MONEY”*
**Advertised Vs Actual Product**6%
*“As Advertised”*
**Muscle Pain Relief**5%
*“Muscle pain improved”*
**Vitamin**3%
*“Vitamins, easy to swallow good amount of supply”*
**Ease Of Chewing/Swallowing**3%
*“Easy to chew and tasty”*
**Efficiency**3%
*“Effective: They do exactly what I bought them for”*
**Ease Of Use**2%
*“Easy Peasy”*
### **What buyers complain about **
**Sleep Quality**15%
*“unable to sleep”*
**Magnesium**10%
*“It is not your ordinary magnesium”*
**Functionality-Overall**7%
*“It does absolutely nothing”*
**Dosage**6%
*“The dose is misleading”*
**Acid Regulator/Stomach Ache Relief**6%
*“Caused severe stomach cramps”*
**Size-Overall**5%
*“Small size”*
**Side Effects**5%
*“However, I have had some uncomfortable side effects:”*
**Quality-Overall**3%
*“There is no reason for this sort of quality control failure unless I am misunderstanding the process”*
**Value For Money**3%
*“Expensive”*
**Advertised Vs Actual Product**3%
*“Misleading Product”*
### **Top return reasons **
**Magnesium**50%
**Joint Pain**50%
## **Common questions**
- **Is mag profitable to sell on Amazon United Kingdom?**
- The niche generates £292K/yr across 12 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -36.3%. Flapen's verdict: Skip it (39/100).
- **How competitive is the mag niche?**
- 9 brands and 44 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in mag?**
- Top complaints mined from reviews: Sleep Quality, Magnesium, Functionality-Overall. The return rate is 0.1%.
- **What does it cost to enter the mag niche?**
- Listings span £3.44–£14.56; the average listing price is £8.26 (sweet spot $15–$100). The average incumbent carries 8,263 reviews — the moat a new listing must climb.
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