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Methylene Blue

soft demand (-37.1% this quarter) — Methylene Blue doesn't clear our bar today.

Flapen Score

46
Skip it

Ranks 1,283 of 2,481 Beauty niches · −1 vs the category median of 47

Market size 49Growth 6Conversion 46Competition 14Returns 97Price range 82Avg price 95Brand share 36Review moat 75Quality gap 47
This niche Category average · 2,481 niches

Is Methylene Blue profitable on Amazon?

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.

Methylene Blue: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -37.1% over the last 90 days and 3.7% of searches end in a purchase.

£271K

revenue / yr

Units sold / yr13K
Search volume / yr-37.1%300K
Conversion rate3.7%
Avg price£24.24

Who owns the niche?

The top 5 brands hold 84% of demand, so 16% of the market is open.

16%

open market share

Brands · sellers9 · 77
Top-5 product click share84%
Open market16%
Avg brand age43 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 9 products

Sponsored placement67%
New entrants (1y)2· 1 succeeded
Avg rating4.5★
Avg reviews502

Top Methylene Blue products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.

£0£27K£54K£81K£108K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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%)

Methylene Blue demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume300KCVR3.7%Products9Brands9Top 5 Brands84%OOS Rate52.9%Rating4.5★Reviews502Avg BSR#19,861
25K15KSpike '24Spike '25Black Friday '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Mar · busiest ÷ quietest = 3.0×

Top Methylene Blue search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • methylene blue236K/yr
  • methylene blue for humans32K/yr
  • methylene10K/yr
  • methylene blue capsules10K/yr
  • blue methylene5K/yr
  • methylene blue pharmaceutical grade5K/yr
  • methylene blue tablets2K/yr

What reviews say buyers love and hate about Methylene Blue

What buyers mention most, as a share of all reviews.

What buyers love

91% of reviews
Quality-Overall26%

Good quality & always delivers on time

Advertised Vs Actual Product18%

Does what it says

Ease Of Use14%

Very easy to use

Value For Money12%

Good value for money

Efficiency6%

It works well for me

What buyers complain about

73% of reviews
Leak-Proof15%

One drop and it's useless

Certifications12%

there isnt a huge amount of transparent third-party testing information easily available

Color10%

It does turn whatever you add it too blue

Stain Resistance9%

The first this I will say is this stuff can stain so be very careful using it

Value For Money8%

which seemed very expensive

Methylene Blue return rate & reasons

Why buyers send it back, as a share of all return requests.

0.7%

Return rate

5%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Leak-Proof
68%
2Compatibility-Overall
9%
3Functionality-Overall
6%
4Strength
3%
5Value For Money
3%

Common Methylene Blue questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Methylene Blue 46/100 on Amazon United Kingdom — Skip it. The niche generates £271K/yr across 9 tracked products. 1 of 2 products launched in the last 360 days are still selling. Search demand moved -37.1% over the last 90 days.
Search demand for Methylene Blue on Amazon United Kingdom peaks in Jan–Feb–Mar, where the busiest month runs 3.0× the quietest.