---
title: "Magnesium Supplements — £4.8M/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/magnesium-supplements"
last_updated: "2026-07-31T22:01:42.009Z"
locale: en
meta:
description: "Niche score 44/100 · £4.8M/yr market · 4.6M searches/yr · £6.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £4.8M/yr market · 4.6M searches/yr · £6.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Magnesium Supplements — £4.8M/yr Amazon UK Niche (2026) - Flapen"
---
# **magnesium supplements**
**Skip it**
Prices mostly outside the sweet spot ($3.44–$9.37) — this niche doesn't clear our bar today.
Market size 97Growth 11Conversion 97Competition 6Returns 100Price range 0Avg price 19Brand share 17Review moat 22Quality gap 35
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Market size**
**Incredible****£4.8M**
£4.8M/yr · 4.6M searches
**Conversion**
**Incredible****14.8%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****9,415.86**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£6.94**
avg listing price — sweet spot $15–$100
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-28.8%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****93%**
top-5 click share — a locked-up shelf
**Price range**
**Bad****£3.44–£9.37**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, magnesium supplements is a £4.8M/yr Amazon United Kingdom market (4.6M searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Jan. Verdict: Skip it — 44/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **magnesium supplements market data**
- **Units sold / yr**
- **600K–800K**
- avg 100,000–125,000/product
- **Revenue / yr**
- **£4.2M–£5.6M**
- units × avg price
- **Conversion rate**
- **14.8%**
- **Avg BSR**
- **#8**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **161 days**
## **Competition & brand share**
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**35**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**93%**
Top 20: 100%
**Open market**
**3%**
- Nutrition Geeks65% - Vitabiotics Ultra13% - Free Soul5% - Nutrivo5% - Zipvit5% - WeightWorld3% - Open — no brand owns it (1 brand, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -28.8% search growth over the last 90 days.
125K75KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/magnesium-supplements/trend)
## **Top magnesium supplements search terms**
- **magnesium**2.2M/yr-24.6%6.8% conv. - **magnesium glycinate 3-in-1**815K/yr-25.6%13.8% conv. - **nutrition geeks magnesium**306K/yr-32.9%22.1% conv. - **magnesium supplements**542K/yr-48.8%5.9% conv. - **geeks magnesium glycinate 3-in-1**196K/yr-26.8%22.3% conv. - **magnesium tablets**150K/yr-25.9%6.3% conv. - **magnesium for sleep**58K/yr-44.1%3.8% conv. - **nutrition geeks magnesium 3 in 1**61K/yr-24.8%22.1% conv. - **magnesium sleep**48K/yr-37.2%2.7% conv. - **glycinate 3 in 1**34K/yr-17.9%27.4% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/magnesium-supplements/search-terms)
## **Top magnesium supplements 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%20%£952K40%£1.9M60%£2.9M80%£3.8M1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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) [2**Magnesium Supplements Tablets**Vitabiotics Ultra**£3.44**4.6★5,535 rev](https://www.amazon.co.uk/dp/B00LNDGDDG) [3**Magnesium Glycinate 4-in-1 Complex | 1283mg Bisglycinate Citrate Malate & 2000mg Turmeric & Black Pepper | 385mg Elemental High Absorption Magnesium Supplements | 90 Tablets | UK Made | Free Soul**Free Soul**£7.24**4.4★3,230 rev](https://www.amazon.co.uk/dp/B0DWT5VLKD) [4**Magnesium Glycinate 3-in-1 Complex 2000mg | Magnesium Glycinate Malate & Citrate with Vitamin B6 | 120 Capsules - 2 Months Supply | High Absorption | No Fillers or Binders | 3rd Party Tested**Nutrivo**£6.32**4.6★648 rev](https://www.amazon.co.uk/dp/B0FQ4FGZZ2) [5**Zipvit Magnesium 500mg of Elemental High-Strength Magnesium Supplement 3 Month Supply 90 Vegan Tablets Supports Muscle Bone & Energy**Zipvit**£6.09**4.5★14,532 rev](https://www.amazon.co.uk/dp/B06Y2HS8L8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Magnesium Glycinate 3-in-1 Complex 2000mg | Magnesium Glycinate Malate & Citrate with Vitamin B6 | 120 Capsules - 2 Months Supply | High Absorption | No Fillers or Binders | 3rd Party Tested**Nutrivo**£6.32**648 rev9mo ago](https://www.amazon.co.uk/dp/B0FQ4FGZZ2) [**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) [**Magnesium Glycinate 4-in-1 Complex | 1283mg Bisglycinate Citrate Malate & 2000mg Turmeric & Black Pepper | 385mg Elemental High Absorption Magnesium Supplements | 90 Tablets | UK Made | Free Soul**Free Soul**£7.24**3,230 rev1y ago](https://www.amazon.co.uk/dp/B0DWT5VLKD) [**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 3-in-1 Complex - 1800mg Supplements as Bisglycinate Citrate & Malate 90 Vegan Capsules Triple High Absorption 384mg Elemental UK Made**Nutrition Geeks**£8.11**35,795 rev3y ago](https://www.amazon.co.uk/dp/B0C9VVCL12)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Magnesium Glycinate 3-in-1 Complex 2000mg | Magnesium Glycinate Malate & Citrate with Vitamin B6 | 120 Capsules - 2 Months Supply | High Absorption | No Fillers or Binders | 3rd Party Tested**Nutrivo**£6.32**4.6★**▲ 106%**](https://www.amazon.co.uk/dp/B0FQ4FGZZ2) [**Magnesium Supplements Tablets**Vitabiotics Ultra**£3.44**4.6★**▲ 49%**](https://www.amazon.co.uk/dp/B00LNDGDDG) [**Magnesium Glycinate 4-in-1 Complex - 400mg Elemental Mg - 180 Capsules**WeightWorld**£9.37**4.6★**— 1%**](https://www.amazon.co.uk/dp/B0DZY117M6) [**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★**— 3%**](https://www.amazon.co.uk/dp/B0C9VVCL12) [**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★**— 5%**](https://www.amazon.co.uk/dp/B0CV7SCS84)
**~~View all trending →~~**
## **What buyers say about magnesium supplements**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**25%
*“Better sleep”*
**Quality-Overall**15%
*“the quality is always consistent”*
**Value For Money**11%
*“EXCELLENT VALUE FOR MONEY”*
**Magnesium**11%
*“best magnesium”*
**Advertised Vs Actual Product**6%
*“As Advertised”*
**Muscle Pain Relief**4%
*“helps muscle cramps”*
**Ease Of Chewing/Swallowing**3%
*“Easy to chew and tasty”*
**Efficiency**3%
*“Effective”*
**Vitamin**3%
*“Vitamins, easy to swallow good amount of supply”*
**Ease Of Use**2%
*“Easy to use”*
### **What buyers complain about **
**Sleep Quality**15%
*“No sleep”*
**Magnesium**9%
*“It is not your ordinary magnesium”*
**Functionality-Overall**7%
*“Didn't do for me”*
**Dosage**6%
*“The dose is misleading”*
**Acid Regulator/Stomach Ache Relief**6%
*“Upsets my stomach”*
**Side Effects**5%
*“only negative effects”*
**Size-Overall**5%
*“they are huge”*
**Quality-Overall**3%
*“Absolutely rubbish”*
**Value For Money**3%
*“Expensive”*
**Advertised Vs Actual Product**2%
*“It's not as described”*
### **Top return reasons **
**Magnesium**50%
**Joint Pain**50%
## **Common questions**
- **Is magnesium supplements profitable to sell on Amazon United Kingdom?**
- The niche generates £4.8M/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -28.8%. Flapen's verdict: Skip it (44/100).
- **How competitive is the magnesium supplements niche?**
- 7 brands and 35 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in magnesium supplements?**
- Top complaints mined from reviews: Sleep Quality, Magnesium, Functionality-Overall. The return rate is 0.1%.
- **When does demand for magnesium supplements peak?**
- Demand peaks in Jan; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the magnesium supplements niche?**
- Listings span £3.44–£9.37; the average listing price is £6.94 (sweet spot $15–$100). The average incumbent carries 9,416 reviews — the moat a new listing must climb.
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