Is mast cell stabilizer profitable to sell on Amazon United States?

The niche generates $106K/yr across 17 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -9.2%. Flapen's verdict: Worth a look (52/100).

How competitive is the mast cell stabilizer niche?

13 brands and 33 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 74% of demand.

What do buyers complain about in mast cell stabilizer?

Top complaints mined from reviews: Allergies, Value For Money, Size-Overall. The return rate is 0.0%.

When does demand for mast cell stabilizer peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the mast cell stabilizer niche?

Listings span $8.00–$47.67; the average listing price is $28.39 (sweet spot $15–$100). The average incumbent carries 814 reviews — the moat a new listing must climb.

Mast Cell Stabilizer

Worth a look

Shows low returns (0.0%), but soft demand (-9.2% this quarter) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$28.39

avg listing price — sweet spot $15–$100

Conversion

Great11.4%

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

Price range

Great$8.00–$47.67

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

Review moat

Good813.71

avg incumbent reviews — the moat a new listing must climb

Brand share

Good74%

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

Competition

Okay60%

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

Market size

Okay$106K

$106K/yr · 33K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-9.2%

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

Is mast cell stabilizer profitable on Amazon?

According to Flapen's Amazon United States niche tracking, mast cell stabilizer is a $106K/yr Amazon United States market (33K searches/yr). The top 5 brands hold 74% of demand. Verdict: Worth a look — 52/100.

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

mast cell stabilizer market size & sales

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

Units sold / yr: 4K–5K; avg 100–250/product
Revenue / yr: $114K–$142K; units × avg price
Conversion rate: 11.4%
Avg BSR: #177
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 5.0%
Avg brand age: 68 months
Avg seller age: 156 days

Competition: brands, sellers & click share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

21%

Life Extension40%
Orgabay10%
Rho Nutrition10%
Pure Encapsulations8%
Natural Factors5%
THORNE5%

mast cell stabilizer demand & seasonality

Weekly Amazon search volume, last 55 weeks — -9.2% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top mast cell stabilizer search terms shoppers use

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

liposomal quercetin18K/yr -7.0%5.0% conv.
quercetin liposomal6K/yr -24.3%4.3% conv.
bio quercetin life extension3K/yr +12.4%26.6% conv.
life extension bio quercetin2K/yr -5.6%23.3% conv.
bio quercetin3K/yr -18.1%16.4% conv.

All search terms

Top mast cell stabilizer 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

Life Extension Bio-Quercetin Immune Health Supplement Heart Health Support Gluten Free Non-GMO Vegetarian 30 Capsules

Life Extension$8.004.6★1,739 rev

Rho Nutrition Liposomal Quercetin - Ultra High Absorption Liquid Quercetin Supplement Seasonal and Immune Support

Rho Nutrition$33.814.6★70 rev

Life Extension Bio-Quercetin 90 Vegetarian Capsules

Life Extension$25.525.0★1 rev

Pure Encapsulations Quercetin UltraSorb | Enhanced-Absorption Cellular Immune and Cardiovascular Support* | 90 Capsules

Pure Encapsulations$47.394.7★213 rev

Orgabay Liposomal Quercetin Phytosome 1600 mg Bromelain 200mg Zinc 30mg Vitamin C Turmeric 40 mg Highest Absorption Quercetin Complex 120 Softgels

Orgabay$29.614.6★220 rev

Newest

by launch date

Clenoriko Quercetin with Bromelain Liposomal Quercetin Complex with Vitamin C & Zinc Elderberry Berberine & Mullein for Immune Wellness & Respiratory Comfort Higher Absorption - 60 Softgels

Clenoriko$22.2021 rev

2mo ago

Life Extension Bio-Quercetin 90 Vegetarian Capsules

Life Extension$25.521 rev

4mo ago

Liposomal Quercetin with Bromelain Liquid Drops 8 in 1 Organic Quercetin 1000mg Supplements with Bromelain 500mg Vitamin C D3 Zinc Elderberry Turmeric for Immunity & Respiratory Health 2 Fl Oz

HOLLEGEND$19.52112 rev

1y ago

Renue By Science Quercetin | High Strength Liposomal Quercetin Supplements | 90 Quercitin Capsules - 150mg Quercetin per Serving | Non-GMO | Made in the USA & Third-Party Tested

Renue By Science$47.6750 rev

2y ago

Rho Nutrition Liposomal Quercetin - Ultra High Absorption Liquid Quercetin Supplement Seasonal and Immune Support

Rho Nutrition$33.8170 rev

2y ago

What reviews say buyers love and hate about mast cell stabilizer

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

What buyers love

Quality-Overall24%

“Good quality”

Taste-Overall9%

“It is actually pretty tasty”

Allergies7%

“Helping to keep my allergies at bay this summer”

Value For Money6%

“Worth the price”

Immunity Booster4%

“Great Immune Support Formula”

Ingredients-Overall3%

“Overall, this is a thoughtfully formulated supplement with a strong combination of ingredients”

Inflammation3%

“Great anti-inflammatory”

Efficiency3%

“Its working effectively”

Absorbency3%

“I feel it is easily absorbed for maximum benefit”

Sinus Relief2%

“Natural sinus defense that works great”

What buyers complain about

Allergies12%

“Allergies”

Value For Money6%

“I wish I had tried a less expensive brand”

Size-Overall5%

“These pills are small”

Side Effects5%

“I cannot say I've noticed any tangible effect yet. about 2 weeks.”

Dosage5%

“Pills are not full”

Sweetness5%

“A little too sweet”

Quality-Overall4%

“Quality control problem – If multiple capsules in the bottle are noticeably half full”

Vitamin3%

“Ive seen zero benefits from taking this quercetin”

Functionality-Overall3%

“Doesn't help 100%”

Water Resistance3%

“The inner cap had water damage”

Top return reasons

Pain Relief-Overall50%

Strength50%

Common mast cell stabilizer questions

Is mast cell stabilizer profitable to sell on Amazon United States?: The niche generates $106K/yr across 17 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -9.2%. Flapen's verdict: Worth a look (52/100).
How competitive is the mast cell stabilizer niche?: 13 brands and 33 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 74% of demand.
What do buyers complain about in mast cell stabilizer?: Top complaints mined from reviews: Allergies, Value For Money, Size-Overall. The return rate is 0.0%.
When does demand for mast cell stabilizer peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the mast cell stabilizer niche?: Listings span $8.00–$47.67; the average listing price is $28.39 (sweet spot $15–$100). The average incumbent carries 814 reviews — the moat a new listing must climb.