---
title: "Methylene Blue — £271K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/beauty/methylene-blue"
last_updated: "2026-08-06T00:06:23.796Z"
locale: en
meta:
description: "Niche score 46/100 · £271K/yr market · 300K searches/yr · £24.24 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · £271K/yr market · 300K searches/yr · £24.24 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Methylene Blue — £271K/yr Amazon UK Niche (2026) - Flapen"
---
# **methylene blue**
**Skip it**
Soft demand (-37.1% this quarter) — this niche doesn't clear our bar today.
Market size 49Growth 6Conversion 46Competition 14Returns 97Price range 82Avg price 95Brand share 36Review moat 75Quality gap 47
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£24.24**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£8.17–£49.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****501.67**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****£271K**
£271K/yr · 300K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****3.7%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****84%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-37.1%**
90-day search growth — must beat 0% to launch
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500") [** Out of Stock**](https://flapen.com/research/niches?market=uk&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United Kingdom niche tracking, methylene blue is a £271K/yr Amazon United Kingdom market (300K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in Jan–Feb–Mar. Verdict: Skip it — 46/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **methylene blue market data**
- **Units sold / yr**
- **10K–13K**
- avg 500–750/product
- **Revenue / yr**
- **£242K–£303K**
- units × avg price
- **Conversion rate**
- **3.7%**
- **Avg BSR**
- **#19,861**
- **Page quality**
- **0%**
- **Prime**
- **67%**
- **Sponsored**
- **67%**
- **Out of stock**
- **52.9%**
- **Avg brand age**
- **43 months**
- **Avg seller age**
- **183 days**
## **Competition & brand share**
The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▲rising
**Sellers**
**77**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**84%**
Top 20: 100%
**Open market**
**11%**
- LUMIN LIFE34% - NT Labs19% - 7 Labs14% - CZTL9% - AzulBotanicals7% - Kordon6% - Open — no brand owns it (3 brands, 11%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -37.1% search growth over the last 90 days.
25K15KSpike '24Spike '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar · busiest ÷ quietest = 3.0×
[**Open Trend **](https://flapen.com/research/uk/beauty/methylene-blue/trend)
## **Top methylene blue search terms**
- **methylene blue**236K/yr-35.3%0.8% conv. - **methylene blue for humans**32K/yr-41.8%0.5% conv. - **methylene**10K/yr-41.5%0.2% conv. - **methylene blue capsules**10K/yr-22.1%0.1% conv. - **blue methylene**5K/yr-61.0%1.8% conv. - **methylene blue pharmaceutical grade**5K/yr-74.5%0.5% conv. - **methylene blue tablets**2K/yr-27.5%0.4% conv. [**All search terms **](https://flapen.com/research/uk/beauty/methylene-blue/search-terms)
## **Top methylene blue 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%£27K20%£54K30%£81K40%£108K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**5% Methylene blue Aqueous Solution Methylthioninium Chloride 120ml Glass bottle with pipette for Research & Analytical Use**LUMIN LIFE**£25.10**5.0★8 rev](https://www.amazon.co.uk/dp/B0H11SB47V) [2**NT Labs Aquarium Methylene Blue Fish Medicine (100ml Treats 900L)**NT Labs**£8.17**4.6★244 rev](https://www.amazon.co.uk/dp/B0DP7DH1DJ) [3**Methylene Blue 2% Solution - Pharmaceutical USP Grade Purity 99.99% No Formaldehyde Formula with Child Resistant Dropper - 50 mL (1.7 fl. oz.)**7 Labs**£24.91**4.2★31 rev](https://www.amazon.co.uk/dp/B0GN3TQRWZ) [4**CZTL Methylene Blue Powder - 1g**CZTL**£24.89**4.5★69 rev](https://www.amazon.co.uk/dp/B08TRN152L) [5**Methylene Blue Infused Whipped Grass Fed Beef Tallow Balm Anti-Aging Moisturizer Stretchmarks Rosacea Psoriasis Eczema Acne All skin types (1.7 oz)**AzulBotanicals**£18.91**4.2★171 rev](https://www.amazon.co.uk/dp/B0D4YZ3FGJ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Methylene Blue 2% Solution - Pharmaceutical USP Grade Purity 99.99% No Formaldehyde Formula with Child Resistant Dropper - 50 mL (1.7 fl. oz.)**7 Labs**£24.91**31 rev2mo ago](https://www.amazon.co.uk/dp/B0GN3TQRWZ) [**5% Methylene blue Aqueous Solution Methylthioninium Chloride 120ml Glass bottle with pipette for Research & Analytical Use**LUMIN LIFE**£25.10**8 rev2mo ago](https://www.amazon.co.uk/dp/B0H11SB47V) [**Methylene Blue**BACTERIOSTATIC**£49.63**106 rev1y ago](https://www.amazon.co.uk/dp/B0DVS5Z8KK) [**NT Labs Aquarium Methylene Blue Fish Medicine (100ml Treats 900L)**NT Labs**£8.17**244 rev1y ago](https://www.amazon.co.uk/dp/B0DP7DH1DJ) [**Methylene Blue Infused Whipped Grass Fed Beef Tallow Balm Anti-Aging Moisturizer Stretchmarks Rosacea Psoriasis Eczema Acne All skin types (1.7 oz)**AzulBotanicals**£18.91**171 rev2y ago](https://www.amazon.co.uk/dp/B0D4YZ3FGJ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**5% Methylene blue Aqueous Solution Methylthioninium Chloride 120ml Glass bottle with pipette for Research & Analytical Use**LUMIN LIFE**£25.10**5.0★**▲ 284%**](https://www.amazon.co.uk/dp/B0H11SB47V) [**DMSO Dimethyl Sulfoxide 99.9% | Ph. Eur. 125ml in Amber Glass Bottle | Undiluted & Odourless | Made in United Kingdom by Dr Hash**Generic**£14.05**4.5★**▲ 58%**](https://www.amazon.co.uk/dp/B0DQQDWJL8) [**Methylene Blue 2% Solution - Pharmaceutical USP Grade Purity 99.99% No Formaldehyde Formula with Child Resistant Dropper - 50 mL (1.7 fl. oz.)**7 Labs**£24.91**4.2★**▲ 46%**](https://www.amazon.co.uk/dp/B0GN3TQRWZ) [**Methylene Blue Powder 6 Grams (USP Grade 99+%) - Prepare 600 mL 1% Solution**DR.OLFACTICS**£40.61**4.2★**▲ 14%**](https://www.amazon.co.uk/dp/B0BPJWCZ1L) [**Kordon Methylene Blue Disease Preventative Safe for Freshwater & Saltwater Aquariums Prevents Fungal Infections & Treats Parasites Reduces Fish Stress 4-Ounces**Kordon**£11.93**4.7★**▼ 21%**](https://www.amazon.co.uk/dp/B00025646W)
**~~View all trending →~~**
## **What buyers say about methylene blue**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**26%
*“Good quality & always delivers on time”*
**Advertised Vs Actual Product**18%
*“Does what it says”*
**Ease Of Use**14%
*“Very easy to use”*
**Value For Money**12%
*“Good value for money”*
**Efficiency**6%
*“It works well for me”*
**Leak-Proof**4%
*“not leaky”*
**Safety Standards**3%
*“The cap is well secured”*
**Color**3%
*“characteristic blue colour that indicates proper concentration”*
**Instructions/User Manual/Troubleshooting**2%
*“Came with a batch test certificate and full instructions and pepite”*
**Allergies**2%
*“Very good for skin irritaions”*
### **What buyers complain about **
**Leak-Proof**15%
*“One drop and it's useless”*
**Certifications**12%
*“there isnt a huge amount of transparent third-party testing information easily available”*
**Color**10%
*“It does turn whatever you add it too blue”*
**Stain Resistance**9%
*“The first this I will say is this stuff can stain so be very careful using it”*
**Value For Money**8%
*“which seemed very expensive”*
**Ease Of Use**8%
*“Do not use”*
**Absorbency**8%
*“as can lead to over absorption through skin”*
**Ease Of Cleaning**3%
*“which can be incredibly messy”*
**Advertised Vs Actual Product**2%
*“While this is labelled as a 2% solution and claims high purity, there isnt a huge amount of transparent third-party testing information easily available, which did make me pause a little”*
### **Top return reasons **
**Leak-Proof**68%
**Compatibility-Overall**9%
**Functionality-Overall**6%
**Strength**3%
**Value For Money**3%
**Adhesion/Stickiness**3%
**Certifications**3%
**Advertised Vs Actual Product**3%
**Color**2%
## **Common questions**
- **Is methylene blue profitable to sell on Amazon United Kingdom?**
- The niche generates £271K/yr across 9 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -37.1%. Flapen's verdict: Skip it (46/100).
- **How competitive is the methylene blue niche?**
- 9 brands and 77 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in methylene blue?**
- Top complaints mined from reviews: Leak-Proof, Certifications, Color. The return rate is 0.7%.
- **When does demand for methylene blue peak?**
- Demand peaks in Jan–Feb–Mar; the busiest month runs 3.0× the quietest.
- **What does it cost to enter the methylene blue niche?**
- Listings span £8.17–£49.63; the average listing price is £24.24 (sweet spot $15–$100). The average incumbent carries 502 reviews — the moat a new listing must climb.
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