Is methylene blue capsules profitable to sell on Amazon United States?

The niche generates $463K/yr across 17 tracked products. 6 of 8 products launched in the last 360 days are still selling. 90-day search growth is -22.5%. Flapen's verdict: Worth a look (59/100).

How competitive is the methylene blue capsules niche?

12 brands and 15 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 77% of demand.

What do buyers complain about in methylene blue capsules?

Top complaints mined from reviews: Side Effects, Dosage, Color. The return rate is 0.0%.

When does demand for methylene blue capsules peak?

Demand peaks in Sep; the busiest month runs 5.4× the quietest.

What does it cost to enter the methylene blue capsules niche?

Listings span $13.09–$49.62; the average listing price is $27.92 (sweet spot $15–$100). The average incumbent carries 459 reviews — the moat a new listing must climb.

Methylene Blue Capsules

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$27.92

avg listing price — sweet spot $15–$100

Price range

Great$13.09–$49.62

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Great9.1%

search→purchase rate — share of searches ending in a sale

Review moat

Great459.06

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Good$463K

$463K/yr · 182K searches

Brand share

Okay77%

top-5 brand share — brands hold most of the demand

Competition

Okay63%

top-5 click share — leaders hold, buyers still browse

Growth

Bad-22.5%

90-day search growth — must beat 0% to launch

Is methylene blue capsules profitable on Amazon?

According to Flapen's Amazon United States niche tracking, methylene blue capsules is a $463K/yr Amazon United States market (182K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in Sep. Verdict: Worth a look — 59/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

methylene blue capsules market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 13K–15K; avg 750–1,000/product
Revenue / yr: $349K–$419K; units × avg price
Conversion rate: 9.1%
Avg BSR: #855
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 4.9%
Avg brand age: 15 months
Avg seller age: 173 days

Competition: brands, sellers & click share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 flat

Sellers

Top-5 brand share

77%

Top 20: 100%

Top-5 click share

63%

Top 20: 100%

Open market

16%

Nutricel Supplements33%
CDE14%
PureNutra14%
Bluesun9%
Chemist Labs7%
Lunakai7%
Open — no brand owns it (6 brands, 16%)

methylene blue capsules demand & seasonality

Weekly Amazon search volume, last 99 weeks — -22.5% search growth over the last 90 days.

Peak months: Sep · busiest ÷ quietest = 5.4×

Open Trend

Top methylene blue capsules search terms shoppers use

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

methylene blue capsules104K/yr -13.5%4.5% conv.
methylene blue pills19K/yr -31.4%5.9% conv.
methylene blue tablets16K/yr -22.2%3.5% conv.
methylene blue capsules pharmaceutical grade10K/yr -36.0%7.3% conv.
blue boost4K/yr +10.6%28.4% conv.
blue boost methylene blue6K/yr -35.8%23.5% conv.
methylene blue supplements capsules4K/yr -74.3%4.5% conv.
nutricel methylene blue3K/yr -16.1%14.2% conv.
methylene blue pharmaceutical grade capsules8K/yr -53.4%3.6% conv.
methylene blue capsule4K/yr -23.8%3.2% conv.

All search terms

Top methylene blue capsules products & what they sell for

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

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Nutricel Supplements Methylene Blue Capsules - Pharmaceutical Grade Supplement - Made in America - 12mg (USP Grade) with Vitamin C Ester Enhanced Absorption - Third Party Tested (60ct)

Nutricel Supplements$32.094.3★1,684 rev

CDE Methylene Blue Capsules 30mg - Made in USA 90 Days Supply - Pharmaceutical CDEMBC USP Grade Third Party Lab Tested Formaldehyde-Free Non-GMO - Cellular & Cognitive Support

CDE$18.654.4★168 rev

Bluesun Methylene Blue Capsules - USP Grade Made in USA 3rd Party Tested - Pharmaceutical Grade 12mg with Vitamin C Ester Supplement for Mitochondrial Function - No Stain 90 Day Supply

Bluesun$14.644.2★2,271 rev

Ultimate Methylene Blue Pharmaceutical Grade 20mg (USP) Methylene Blue Capsules for Humans | Memory Supplement and Brain Booster Supplement | Focus Fuel and Memory Vitamins Energy Pills | 120 Servings

PureNutra$25.734.3★466 rev

Lunakai USA Made USP Grade Methylene Blue Capsules with Vitamin C B6 B12 3rd-Party Tested Daily Wellness Support Supplement 60ct

Lunakai$22.734.4★348 rev

Newest

by launch date

Methylene Blue Capsules USP Grade1% High Purity Formula with Vitamin C Ester Natural Energy & Antioxidant Support Third Party Tested 60 Capsules

NeoMethis$19.1724 rev

2mo ago

Itharoventis Methylene Blue Pharmaceutical Grade Capsules USP Grade Supplement with CoQ10 NAC PQQ Glycine & Vitamin C Capsule Format No Formaldehyde 60 Count

Itharoventis$24.3519 rev

2mo ago

CDE Methylene Blue Capsules 30mg - Made in USA 90 Days Supply - Pharmaceutical CDEMBC USP Grade Third Party Lab Tested Formaldehyde-Free Non-GMO - Cellular & Cognitive Support

CDE$18.65168 rev

3mo ago

ZAB Pharmaceutical Grade Supplement Methylene Blue Capsules Brain Supplement for Humans with Vitamin C & B Complex Blue Methylene 10 mg per Capsules Memory Clarity & Cognitive Support

ZAB$13.0953 rev

5mo ago

Lunakai USA Made USP Grade Methylene Blue Capsules with Vitamin C B6 B12 3rd-Party Tested Daily Wellness Support Supplement 60ct

Lunakai$22.73348 rev

7mo ago

What reviews say buyers love and hate about methylene blue capsules

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall20%

“the clear focus on quality”

Focus Enhancement8%

“Absolutely improves your memory”

Energy Level8%

“Gave me energy”

Ease Of Use7%

“Easy to Take, Great Results”

Value For Money7%

“Great Value”

Advertised Vs Actual Product6%

“As described”

Dosage5%

“the dosage is convenient”

Ease Of Chewing/Swallowing4%

“The capsules are easy for me to take”

Efficiency4%

“Effectives”

Color3%

“Blue is true blue”

What buyers complain about

Side Effects10%

“Too potent major headaches”

Dosage10%

“To high of dose to be sold”

Color9%

“these are a dirty-pale greenish-grey color. rather than the normal light blue color”

Functionality-Overall7%

“Doesn't live up to it's described behavior”

Value For Money5%

“However, its way too expensive for me”

Quality-Overall4%

“Nasty trash”

Smell2%

“And there is a weird lemon chemical smell”

Ingredients-Overall2%

“I will never put YouTube suggested chemicals in my body again”

Energy Level2%

“no energy - plus”

Sleep Quality2%

“I didnt notice anything different except I actually dont sleep very well even 15 hours after taking it”

Top return reasons

Compatibility-Overall40%

Functionality-Overall40%

Certifications10%