Is dao enzyme supplements profitable to sell on Amazon United States?

The niche generates $2.8M/yr across 22 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is +4.7%. Flapen's verdict: Launch it (69/100).

How competitive is the dao enzyme supplements niche?

17 brands and 27 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in dao enzyme supplements?

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

When does demand for dao enzyme supplements peak?

Demand peaks in Apr–May; the busiest month runs 1.6× the quietest.

What does it cost to enter the dao enzyme supplements niche?

Listings span $16.54–$85.94; the average listing price is $36.72 (sweet spot $15–$100). The average incumbent carries 864 reviews — the moat a new listing must climb.

dao enzyme supplements

Launch it

A $2.8M/yr market growing +4.7% this quarter with returns at 0.0% — clears our launch bar.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Market size

Incredible$2.8M

$2.8M/yr · 902K searches

Avg price

Incredible$36.72

avg listing price — sweet spot $15–$100

Price range

Incredible$16.54–$85.94

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

Conversion

Great8.5%

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

Review moat

Good864

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Brand share

Good71%

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

Competition

Okay57%

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

Growth

Okay+4.7%

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

According to Flapen's Amazon United States niche tracking, dao enzyme supplements is a $2.8M/yr Amazon United States market (902K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Apr–May. Verdict: Launch it — 69/100.

Data updated Jul 26, 2026 · scored weekly · How we score niches

dao enzyme supplements market data

Units sold / yr: 60K–80K; avg 2,000–2,500/product
Revenue / yr: $2.2M–$2.9M; units × avg price
Conversion rate: 8.5%
Avg BSR: #200
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 3.5%
Avg brand age: 90 months
Avg seller age: 154 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

57%

Top 20: 98%

Open market

23%

SOLARAY24%
Seeking Health16%
Life Extension11%
NATURDAOCOM LEGUMACTIVE11%
Pure Encapsulations10%
NATURDAO6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +4.7% search growth over the last 90 days.

Peak months: Apr, May · busiest ÷ quietest = 1.6×

Open Trend

Top dao enzyme supplements search terms

dao enzyme285K/yr +11.0%8.3% conv.
dao supplements histamine blocker129K/yr -2.9%8.3% conv.
dao122K/yr +5.4%6.9% conv.
histamine blocker54K/yr +5.0%2.8% conv.
dao enzyme supplements49K/yr +2.8%6.7% conv.
dao supplement46K/yr -3.1%4.9% conv.
histamine29K/yr +15.3%1.1% conv.
naturdao22K/yr +35.1%11.4% conv.
doa enzyme16K/yr +15.2%8.5% conv.
histamine digest42K/yr -21.7%7.0% conv.

All search terms

Top dao enzyme supplements 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.

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

All 22 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

SOLARAY DAO Enzyme - Digestive Enzyme that Breaks Down Histamine - 60 000 HDU - Digestive Enzymes - Vegan Gluten Free Lab Verified - 30 Servings 30 VegCaps

SOLARAY$21.934.3★323 rev

Life Extension Food Sensitivity Relief with Diamine Oxidase (DAO) Occasional Gas Digestive Comfort histamine Sensitivity DAO Enzyme Supplement Gluten Free Non-GMO Vegetarian 60 Capsules

Life Extension$25.944.5★401 rev

NATURDAO DAO enzyme 1 000 000 HDU per tablet - DAO Enzyme Supplement - Histamine Block - Diamine Oxidase - Food Intolerance - 60 Extended Release Tablets

NATURDAOCOM LEGUMACTIVE$39.514.3★1,261 rev

Seeking Health DAO Enzyme - Formerly Histamine Digest DAO Enzyme Supplement for Histamine Food Intolerance Supports Digestive Health Upset Stomach (90 Capsules)*

Seeking Health$85.944.3★2,225 rev

Pure Encapsulations DAO Enzyme - Histamine Breakdown Digestion Support Supplement* - Ease Digestive Discomfort & Skin Sensitivity* - Allergen-Free Health Supplement - 60 Capsules

Pure Encapsulations$48.464.4★96 rev

Newest

by launch date

NATURDAO MAX DAO Enzyme Supplement 120 Tablets 50 000 HDU per Tablet Adjustable Dosage Extended Release Histamine Blocker

NATURDAO$23.4542 rev

3mo ago

KUAFLY DAO Supplements Histamine Blocker DAO Enzyme + Diamine Oxidase & Quercetin Immortelle Vitamin C for Gut Health and Food Support 60 Capsules

KUAFLY$17.9863 rev

4mo ago

Hekeauo DAO Enzyme DAO Supplements Histamine Blocker for Women & Men Digestive Enzymes Diamine Oxidase 30 000 HDU for Food s& Histamine Support 60 Capsules

Hekeauo$17.888 rev

4mo ago

GREAT BILLIOM DAO Enzyme (Diamine Oxidase) - Digestive Enzymes for Women & Men - 30 000 HDU - Gut Health Supplements - Digestive Health Histamine Support - Enzymes for Digestion - 60 Capsules

GREAT BILLIOM$19.2292 rev

9mo ago

Vellur Histamine Protect DAO Enzyme Supplement 60 Capsules

Velluré$18.3869 rev

9mo ago

What buyers say about dao enzyme supplements

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

What buyers love

Quality-Overall10%

“Huge improvement to my quality of life”

Efficiency9%

“Seems to work ok”

Regulates Digestion8%

“Effective digestive aid”

Fever Relief7%

“It helps my histamine intolerance”

Value For Money7%

“Good value for the money”

Allergies6%

“This really helps me with my allergies”

Immunity Booster5%

“overall immune support”

Acid Regulator/Stomach Ache Relief3%

“NO stomach pain”

Side Effects3%

“it did not give me any adverse reaction”

Vitamin3%

“Great supplement”

What buyers complain about

Allergies13%

“Been having issues with rashes”

Functionality-Overall11%

“Not effective”

Value For Money9%

“Too expensive”

Acid Regulator/Stomach Ache Relief5%

“I sometimes experience bloating”

Dosage5%

“I was hoping this would be better because of the higher dose”

Side Effects5%

“Side effects”

Vegan/Organic3%

“And it will not work in the vegetarian capsule as it needs to be in a delayed release capsule with an enteric coating so it does not breakdown quickly like vegetarian capsules do”

Nutritional Content2%

“and would not be able to eat many food items without this product”

Heart Health2%

“and it gave me heartburn”

Regulates Digestion2%

“I haven't noticed a strong effect on digestion in day-to-day use”

Top return reasons

Advertised Vs Actual Product29%

Functionality-Overall14%

Ingredients-Overall14%

Ease Of Use7%

Acid Regulator/Stomach Ache Relief7%

Stale/Rotten/Spoiled7%

Smell7%

Certifications7%

Itch Relief7%

Common questions

Is dao enzyme supplements profitable to sell on Amazon United States?: The niche generates $2.8M/yr across 22 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is +4.7%. Flapen's verdict: Launch it (69/100).
How competitive is the dao enzyme supplements niche?: 17 brands and 27 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in dao enzyme supplements?: Top complaints mined from reviews: Allergies, Functionality-Overall, Value For Money. The return rate is 0.0%.
When does demand for dao enzyme supplements peak?: Demand peaks in Apr–May; the busiest month runs 1.6× the quietest.
What does it cost to enter the dao enzyme supplements niche?: Listings span $16.54–$85.94; the average listing price is $36.72 (sweet spot $15–$100). The average incumbent carries 864 reviews — the moat a new listing must climb.