Is mullein leaf capsules profitable to sell on Amazon United States?

The niche generates $134K/yr across 10 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -19.8%. Flapen's verdict: Skip it (43/100).

How competitive is the mullein leaf capsules niche?

9 brands and 10 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 85% of demand.

What do buyers complain about in mullein leaf capsules?

Top complaints mined from reviews: Functionality-Overall, Cough Relief, Breathability. The return rate is 0.0%.

When does demand for mullein leaf capsules peak?

Demand is steady year-round — the busiest month runs 1.6× the quietest.

What does it cost to enter the mullein leaf capsules niche?

Listings span $9.05–$20.10; the average listing price is $15.78 (sweet spot $15–$100). The average incumbent carries 1,381 reviews — the moat a new listing must climb.

Mullein Leaf Capsules

Skip it

Soft demand (-19.8% this quarter) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great10.9%

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

Avg price

Great$15.78

avg listing price — sweet spot $15–$100

Review moat

Good1,381.1

avg incumbent reviews — the moat a new listing must climb

Price range

Okay$9.05–$20.10

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

Brand share

Okay85%

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

Market size

Okay$134K

$134K/yr · 78K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad79%

top-5 click share — a locked-up shelf

Growth

Bad-19.8%

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

Is mullein leaf capsules profitable on Amazon?

According to Flapen's Amazon United States niche tracking, mullein leaf capsules is a $134K/yr Amazon United States market (78K searches/yr). The top 5 brands hold 85% of demand. Verdict: Skip it — 43/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

mullein leaf capsules market size & sales

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

Units sold / yr: 8K–10K; avg 750–1,000/product
Revenue / yr: $126K–$158K; units × avg price
Conversion rate: 10.9%
Avg BSR: #453
Page quality: 0%
Prime: 100%
Sponsored: 80%
Out of stock: 9.2%
Avg brand age: 52 months
Avg seller age: 157 days

Competition: brands, sellers & click share

The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 flat

Sellers

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

79%

Top 20: 100%

Open market

10%

Zazzee53%
NUTRAHARMONY14%
Nutricost7%
Carlyle6%
DEAL SUPPLEMENT6%
Nature's Answer5%
Open — no brand owns it (3 brands, 10%)

mullein leaf capsules demand & seasonality

Weekly Amazon search volume, last 103 weeks — -19.8% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.6×

Open Trend

Top mullein leaf capsules search terms shoppers use

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

mullein capsules23K/yr -11.9%6.4% conv.
mullein leaf capsules14K/yr +7.8%8.8% conv.
mullein capsules for lungs10K/yr -12.3%8.8% conv.
mullein pills9K/yr -28.3%7.4% conv.
mullein supplement8K/yr -25.3%5.9% conv.
mullein pills for lungs5K/yr -24.8%7.0% conv.
mullen capsule6K/yr -27.6%6.5% conv.
mullein capsules supplements3K/yr -83.6%9.3% conv.

All search terms

Top mullein leaf 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Zazzee Extra Strength Mullein Leaf 10:1 Extract 120 Vegan Capsules 4 Month Supply Verbascum Thapsus Respiratory & Lung Support Certified Kosher 100% Pure Leaf Powder Non-GMO Made in the USA

Zazzee$19.994.6★4,383 rev

Mullein Lung Detox - Mullein Leaf 10:1 Extract - Marshmallow Root | Echinacea | Oregano | Quercetin | NAC - 15-in-1 Lung Support & Cleanse for Smokers Supplement - for Women & Men - 60 Vegan Capsules

NUTRAHARMONY$20.054.5★3,143 rev

Zazzee USDA Organic Mullein Leaf 10:1 Extract 120 Vegan Capsules 4 Month Supply Verbascum Thapsus Respiratory & Lung Support Organic Herbal Supplement All-Natural Non-GMO Made in the USA

Zazzee$20.104.6★148 rev

Nutricost Mullein Leaf Extract 120 Capsules for 60 Serving Per Bottle

Nutricost$12.674.6★117 rev

Carlyle Mullein Leaf Extract | 200 Capsules | Verbascum Thapsus

Carlyle$17.014.6★2,137 rev

Newest

by launch date

Zazzee USDA Organic Mullein Leaf 10:1 Extract 120 Vegan Capsules 4 Month Supply Verbascum Thapsus Respiratory & Lung Support Organic Herbal Supplement All-Natural Non-GMO Made in the USA

Zazzee$20.10148 rev

10mo ago

Nutricost Mullein Leaf Extract 120 Capsules for 60 Serving Per Bottle

Nutricost$12.67117 rev

1y ago

FITO MEDICS Mullein | Mullein Leaf Capsules | 180 Capsules | Concentrated Extract | Highly Absorbable Herbal Supplement

FITO MEDIC'S$9.057 rev

1y ago

500mg Mullein Extract for Lung Support and Respiratory Health 30 Count

HAVASU NUTRITION$10.67593 rev

2y ago

Mullein Lung Detox - Mullein Leaf 10:1 Extract - Marshmallow Root | Echinacea | Oregano | Quercetin | NAC - 15-in-1 Lung Support & Cleanse for Smokers Supplement - for Women & Men - 60 Vegan Capsules

NUTRAHARMONY$20.053,143 rev

2y ago

What reviews say buyers love and hate about mullein leaf capsules

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

What buyers love

Cough Relief20%

“Cough gone”

Quality-Overall18%

“Seem to be good quality supplements and work well”

Breathability11%

“Breathe better”

Efficiency9%

“Amazing Results”

Advertised Vs Actual Product6%

“as advertized”

Value For Money5%

“Good value”

Vitamin3%

“This is a pretty good supplement”

Side Effects2%

“I havent noticed any side effects was easy to use didnt affect my digestive track at all”

Natural Ingredients2%

“A natural aid that really works”

Dosage1%

“quality of capsule”

What buyers complain about

Functionality-Overall19%

“No results”

Cough Relief18%

“Nothing worked on my constant cough untill i tried mullein”

Breathability5%

“Made Breathing Worse”

Taste-Overall4%

“It does have a slight green taste”

Side Effects3%

“Side affect”

Quality-Overall3%

“Quality issues”

Certifications3%

“there is none of USDA show anywhere on the product”

Smell3%

“they dont really have a smell either”

Allergies2%

“Had a bad allergic reaction”

Sinus Relief2%

“one of the added ingredients triggered my sinuses badly”

Top return reasons

Functionality-Overall75%

Ingredients-Overall25%

Common mullein leaf capsules questions

Is mullein leaf capsules profitable to sell on Amazon United States?: The niche generates $134K/yr across 10 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -19.8%. Flapen's verdict: Skip it (43/100).
How competitive is the mullein leaf capsules niche?: 9 brands and 10 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 85% of demand.
What do buyers complain about in mullein leaf capsules?: Top complaints mined from reviews: Functionality-Overall, Cough Relief, Breathability. The return rate is 0.0%.
When does demand for mullein leaf capsules peak?: Demand is steady year-round — the busiest month runs 1.6× the quietest.
What does it cost to enter the mullein leaf capsules niche?: Listings span $9.05–$20.10; the average listing price is $15.78 (sweet spot $15–$100). The average incumbent carries 1,381 reviews — the moat a new listing must climb.