---
title: "Milk of Magnesia — £90K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/grocery/milk-of-magnesia"
last_updated: "2026-07-31T21:10:37.148Z"
locale: en
meta:
description: "Niche score 40/100 · £90K/yr market · 91K searches/yr · £11.53 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 40/100 · £90K/yr market · 91K searches/yr · £11.53 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Milk of Magnesia — £90K/yr Amazon UK Niche (2026) - Flapen"
---
# **milk of magnesia**
**Skip it**
A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Market size 22Growth 25Conversion 81Competition 0Returns 100Price range 24Avg price 46Brand share 0Review moat 74Quality gap 76
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.5%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****521.5**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****£11.53**
avg listing price — sweet spot $15–$100
**Growth**
**Okay****+0.2%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£5.21–£18.12**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Bad****£90K**
£90K/yr · 91K searches
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, milk of magnesia is a £90K/yr Amazon United Kingdom market (91K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Mar–Nov–Dec. Verdict: Skip it — 40/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **milk of magnesia market data**
- **Units sold / yr**
- **13K–15K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **£144K–£173K**
- units × avg price
- **Conversion rate**
- **8.5%**
- **Avg BSR**
- **#372**
- **Page quality**
- **0%**
- **Prime**
- **75%**
- **Sponsored**
- **25%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **160 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▲rising
**Sellers**
**12**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- MILK OF MAGNESIA49% - Bayer40% - Generic6% - LuxPaks6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +0.2% search growth over the last 90 days.
23K18KSpike '24Holiday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar, Nov, Dec · busiest ÷ quietest = 7.7×
[**Open Trend **](https://flapen.com/research/uk/grocery/milk-of-magnesia/trend)
## **Top milk of magnesia search terms**
- **milk of magnesia**53K/yr-2.0%8.3% conv. - **milk of magnesia liquid original**25K/yr-20.1%12.8% conv. - **milk of magnesium**5K/yr+162.2%2.9% conv. - **milk of magnesia liquid**5K/yr-12.1%11.3% conv. - **milk magnesium liquid**3K/yr+23.5%5.2% conv. [**All search terms **](https://flapen.com/research/uk/grocery/milk-of-magnesia/search-terms)
## **Top milk of magnesia 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%£13K30%£27K45%£40K60%£54K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**MILK OF MAGNESIA Phillips Multicoloured Mint 200 ml**MILK OF MAGNESIA**£5.21**4.7★2,008 rev](https://www.amazon.co.uk/dp/B0051I6D8Y) [2**Phillips Milk of Magnesia Original Liquid 12 fl oz 355ml Bayer Consumer**Bayer**£10.94**4.4★60 rev](https://www.amazon.co.uk/dp/B002FAU5CG) [3**Milk of Magnesia Liquid Philips Traditional Mint Flavour for Indigestion 200ml**Generic**£11.87**4.5★15 rev](https://www.amazon.co.uk/dp/B0F3D6M37P) [4**LUXPAKS Tongue Scraper Bundled with Phllips Milk of Magnesia Sugar-Free**LuxPaks**£18.12**3.5★3 rev](https://www.amazon.co.uk/dp/B0FYK7Q2CX)
### **Newest**
by launch date
[**LUXPAKS Tongue Scraper Bundled with Phllips Milk of Magnesia Sugar-Free**LuxPaks**£18.12**3 rev8mo ago](https://www.amazon.co.uk/dp/B0FYK7Q2CX) [**Phillips Milk of Magnesia Original Liquid 12 fl oz 355ml Bayer Consumer**Bayer**£10.94**60 rev10y ago](https://www.amazon.co.uk/dp/B002FAU5CG) [**MILK OF MAGNESIA Phillips Multicoloured Mint 200 ml**MILK OF MAGNESIA**£5.21**2,008 rev17y ago](https://www.amazon.co.uk/dp/B0051I6D8Y) [**Milk of Magnesia Liquid Philips Traditional Mint Flavour for Indigestion 200ml**Generic**£11.87**15 rev17y ago](https://www.amazon.co.uk/dp/B0F3D6M37P)
### **Trending**
90-day click momentum
[**Phillips Milk of Magnesia Original Liquid 12 fl oz 355ml Bayer Consumer**Bayer**£10.94**4.4★**▲ 74%**](https://www.amazon.co.uk/dp/B002FAU5CG) [**LUXPAKS Tongue Scraper Bundled with Phllips Milk of Magnesia Sugar-Free**LuxPaks**£18.12**3.5★**▲ 57%**](https://www.amazon.co.uk/dp/B0FYK7Q2CX) [**MILK OF MAGNESIA Phillips Multicoloured Mint 200 ml**MILK OF MAGNESIA**£5.21**4.7★**▼ 25%**](https://www.amazon.co.uk/dp/B0051I6D8Y) [**Milk of Magnesia Liquid Philips Traditional Mint Flavour for Indigestion 200ml**Generic**£11.87**4.5★**▼ 31%**](https://www.amazon.co.uk/dp/B0F3D6M37P)
## **What buyers say about milk of magnesia**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Acid Regulator/Stomach Ache Relief**32%
*“helps my tummy”*
**Quality-Overall**29%
*“Great product”*
**Value For Money**11%
*“Large bottle really good price”*
**Regulates Digestion**7%
*“effectively relieve digestive discomfort”*
**Advertised Vs Actual Product**7%
*“Arrived as stated as described”*
**Durability**4%
*“have been using it for years”*
**Design-Overall**4%
*“The design is ALSO a bigger bottle - great value”*
**Magnesium**4%
*“Magnesium hydroxide reacts with your stomach acid to provide water”*
**Taste-Overall**4%
*“Not an unpleasant taste either”*
### **What buyers complain about **
**Value For Money**25%
*“Missled and v v expensive”*
**Taste-Overall**25%
*“it tastes absolutely awful”*
**Functionality-Overall**17%
*“Didn't work”*
**Size-Overall**17%
*“Smallish bottle”*
**Strength**8%
*“with much weaker content”*
**Texture/Consistency-Overall**8%
*“clumpy texture in your mouth”*
## **Common questions**
- **Is milk of magnesia profitable to sell on Amazon United Kingdom?**
- The niche generates £90K/yr across 4 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +0.2%. Flapen's verdict: Skip it (40/100).
- **How competitive is the milk of magnesia niche?**
- 4 brands and 12 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in milk of magnesia?**
- Top complaints mined from reviews: Value For Money, Taste-Overall, Functionality-Overall. The return rate is 0.0%.
- **When does demand for milk of magnesia peak?**
- Demand peaks in Jan–Feb–Mar–Nov–Dec; the busiest month runs 7.7× the quietest.
- **What does it cost to enter the milk of magnesia niche?**
- Listings span £5.21–£18.12; the average listing price is £11.53 (sweet spot $15–$100). The average incumbent carries 522 reviews — the moat a new listing must climb.
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