---
title: "Magtein — £38K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/magtein"
last_updated: "2026-07-31T17:11:45.176Z"
locale: en
meta:
description: "Niche score 42/100 · £38K/yr market · 21K searches/yr · £23.18 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · £38K/yr market · 21K searches/yr · £23.18 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Magtein — £38K/yr Amazon UK Niche (2026) - Flapen"
---
# **magtein**
**Skip it**
A small market ($38K/yr) — this niche doesn't clear our bar today.
Market size 10Growth 16Conversion 79Competition 16Returns 100Price range 83Avg price 95Brand share 35Review moat 39Quality gap 37
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£23.18**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£11.95–£31.74**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****7.9%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****2,629.82**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Growth**
**Bad****-17.5%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****81%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****£38K**
£38K/yr · 21K searches
According to Flapen's Amazon United Kingdom niche tracking, magtein is a £38K/yr Amazon United Kingdom market (21K searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 42/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **magtein market data**
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **£35K–£46K**
- units × avg price
- **Conversion rate**
- **7.9%**
- **Avg BSR**
- **#471**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **82%**
- **Out of stock**
- **7.7%**
- **Avg brand age**
- **35 months**
- **Avg seller age**
- **183 days**
## **Competition & brand share**
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**10 **▲rising
**Sellers**
**35**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**81%**
Top 20: 100%
**Open market**
**12%**
- Time Health41% - Vinco Supplements13% - swiss bioenergetics11% - Double Wood Supplements10% - Hexagon9% - Intelligent Labs4% - Open — no brand owns it (4 brands, 12%)
## **Demand**
Weekly Amazon search volume, last 14 weeks — -17.5% search growth over the last 90 days.
500300Apr '26May '26May '26May '26Jun '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/magtein/trend)
## **Top magtein 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%15%£6K30%£11K45%£17K60%£23K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Magtein Magnesium Threonate 120 Capsules High Strength 2100mg Pullulan Capsules UK Made to GMP & HACCP Standards Zero Additives**Time Health**£22.06**4.5★1,083 rev](https://www.amazon.co.uk/dp/B0B3F6YQPC) [2**Vinco Magnesium L-Threonate Supplement - 120 High Strength Magnesium L Threonate Capsules - 2000mg Bioavailable Form of Magnesium per Serving - Non-GMO & Gluten Free - Made in The UK**Vinco Supplements**£11.95**4.5★737 rev](https://www.amazon.co.uk/dp/B0DV47T8WQ) [3**Double Wood Magnesium L Threonate Supplement | 120 Capsules (30 Servings) High Strength Magnesium L Threonate (4 per Serving) 2000mg**Double Wood Supplements**£31.74**4.6★18,625 rev](https://www.amazon.co.uk/dp/B01M4GM9R1) [4**Magnesium L-Threonate Magtein 2000mg - Memory Mental Clarity Restorative Sleep - Optimal Cerebral Assimilation - Patented Form from MIT - 90 Vegan Capsules - +1 Month Cure - Hexagon**Hexagon**£23.17**4.5★197 rev](https://www.amazon.co.uk/dp/B0FYFL9BB2) [5**Magnesium L-Threonate 2100mg Daily Dose Magtein 30 Day Supply - Providing 151mg of Active Elemental Magnesium - Easily Absorbable - Highly Bioavailable No Artificial fillers - UK Manufactured**swiss bioenergetics**£23.17**4.5★296 rev](https://www.amazon.co.uk/dp/B09ZPTWZZP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**NaturesPlus Magtein Magnesium L-Threonate- High Strength Calm Mood Memory Focus Cognitive - Vegan Non-GMO Gluten-Free - 90 Capsules**Nature's Plus**£29.67**2 rev4mo ago](https://www.amazon.co.uk/dp/B0GRBGLGNT) [**Magnesium L-Threonate Magtein 2000mg - Memory Mental Clarity Restorative Sleep - Optimal Cerebral Assimilation - Patented Form from MIT - 90 Vegan Capsules - +1 Month Cure - Hexagon**Hexagon**£23.17**197 rev8mo ago](https://www.amazon.co.uk/dp/B0FYFL9BB2) [**Bandini Magnesium L-Threonate Magtein | High Strength Magnesium L Threonate 2000mg per Serving with Vitamins B1 B6 and B12 | 90 Vegan Capsules | High Absorption for Cognitive Function Support**BANDINI**£28.02**56 rev9mo ago](https://www.amazon.co.uk/dp/B0FTFY3VRM) [**HARMONIFY Magnesium L Threonate Supplement with L Theanine Lemon Balm and Apigenin High Absorption 120 Purified Veggie Capsules 1400 mg Gluten Free Non-GMO Vegetarian**HARMONIFY**£14.08**29 rev1y ago](https://www.amazon.co.uk/dp/B0CY7981P2) [**Vinco Magnesium L-Threonate Supplement - 120 High Strength Magnesium L Threonate Capsules - 2000mg Bioavailable Form of Magnesium per Serving - Non-GMO & Gluten Free - Made in The UK**Vinco Supplements**£11.95**737 rev1y ago](https://www.amazon.co.uk/dp/B0DV47T8WQ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MagEnhance Magnesium Complex for Sleep Support - Magtein L-threonate Glycinate & Taurate - Nervous System & Muscle Relaxation Gentle on the Stomach 90 Vegan Capsules 30-Day Supply**Intelligent Labs**£20.75**4.4★**▲ 269%**](https://www.amazon.co.uk/dp/B073WZ9SM3) [**NaturesPlus Magtein Magnesium L-Threonate- High Strength Calm Mood Memory Focus Cognitive - Vegan Non-GMO Gluten-Free - 90 Capsules**Nature's Plus**£29.67**5.0★**▲ 253%**](https://www.amazon.co.uk/dp/B0GRBGLGNT) [**Life Extension Neuro-Mag Magnesium-L-Threonate Minerals Muscle Cramps 90 Capsules Nutritional Supplement Vegan Gluten Free Soy Free**Life Extension**£31.19**4.6★**▲ 193%**](https://www.amazon.co.uk/dp/B0BVRJ19CT) [**Magnesium L-Threonate Magtein 2000mg - Memory Mental Clarity Restorative Sleep - Optimal Cerebral Assimilation - Patented Form from MIT - 90 Vegan Capsules - +1 Month Cure - Hexagon**Hexagon**£23.17**4.5★**▲ 153%**](https://www.amazon.co.uk/dp/B0FYFL9BB2) [**Bandini Magnesium L-Threonate Magtein | High Strength Magnesium L Threonate 2000mg per Serving with Vitamins B1 B6 and B12 | 90 Vegan Capsules | High Absorption for Cognitive Function Support**BANDINI**£28.02**4.7★**▲ 62%**](https://www.amazon.co.uk/dp/B0FTFY3VRM)
**~~View all trending →~~**
## **What buyers say about magtein**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**26%
*“Better sleep”*
**Quality-Overall**20%
*“So far, good quality for money, no side effects”*
**Magnesium**15%
*“Good quality magnesium supplement”*
**Efficiency**7%
*“It is very efficient”*
**Value For Money**4%
*“these are great value”*
**Focus Enhancement**4%
*“For long term cognitive and sleep benefits”*
**Advertised Vs Actual Product**3%
*“Doing what is suppose to do”*
**Soothing Effect**3%
*“Great feeling of calmness”*
**Ease Of Use**3%
*“Easy to take”*
**Stress/Anxiety**3%
*“Great feeling of calmness”*
### **What buyers complain about **
**Sleep Quality**18%
*“Made no difference to my sleep”*
**Magnesium**13%
*“took it two hours after my breakfast due to drinking tea which would gave a negative effect on the magnesium”*
**Value For Money**13%
*“Therefore these are 4 X more expensive than advertised”*
**Acid Regulator/Stomach Ache Relief**9%
*“Abdominal pain”*
**Side Effects**8%
*“you have to be aware that you are taking massive doses of magnesium if you take it according to the instructions, way a over the recommended daily intake and for some people this causes abdominal pain and other issues, and may not be good for heart and kidneys on a long term basis”*
**Nutritional Content**7%
*“As with all nutritional supplements, I have no results to compare”*
**Functionality-Overall**4%
*“Didnt work for me”*
**Ingredients-Overall**4%
*“PRODUCT HAS CHANGED INGREDIENTS”*
**Advertised Vs Actual Product**4%
*“The new bottles do not have the logo”*
**Taste-Overall**4%
*“Didn't love it tbh due to the fish aftertaste being pretty strong”*
### **Top return reasons **
**Magnesium**100%
## **Common questions**
- **Is magtein profitable to sell on Amazon United Kingdom?**
- The niche generates £38K/yr across 11 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -17.5%. Flapen's verdict: Skip it (42/100).
- **How competitive is the magtein niche?**
- 10 brands and 35 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in magtein?**
- Top complaints mined from reviews: Sleep Quality, Magnesium, Value For Money. The return rate is 0.1%.
- **What does it cost to enter the magtein niche?**
- Listings span £11.95–£31.74; the average listing price is £23.18 (sweet spot $15–$100). The average incumbent carries 2,630 reviews — the moat a new listing must climb.
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