Is adk profitable to sell on Amazon United States?

The niche generates $669K/yr across 16 tracked products. 90-day search growth is -5.2%. Flapen's verdict: Worth a look (55/100).

How competitive is the adk niche?

11 brands and 21 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 84% of demand.

What do buyers complain about in adk?

Top complaints mined from reviews: Smell, Dosage, Adhesion/Stickiness. The return rate is 0.0%.

When does demand for adk peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the adk niche?

Listings span $12.86–$59.16; the average listing price is $32.01 (sweet spot $15–$100). The average incumbent carries 764 reviews — the moat a new listing must climb.

adk

Worth a look

Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible12.6%

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

Avg price

Incredible$32.01

avg listing price — sweet spot $15–$100

Price range

Great$12.86–$59.16

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

Review moat

Good764.06

avg incumbent reviews — the moat a new listing must climb

Market size

Good$669K

$669K/yr · 166K searches

Brand share

Okay84%

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

Competition

Okay69%

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

Growth

Bad-5.2%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, adk is a $669K/yr Amazon United States market (166K searches/yr). The top 5 brands hold 84% of demand. Verdict: Worth a look — 55/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

adk market data

Units sold / yr: 20K–25K; avg 1,000–1,250/product
Revenue / yr: $640K–$800K; units × avg price
Conversion rate: 12.6%
Avg BSR: #237
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 73 months
Avg seller age: 154 days

Competition & brand share

The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

Top-5 brand share

84%

Top 20: 100%

Top-5 click share

69%

Top 20: 100%

Open market

11%

NatureGenX28%
Biote24%
Codeage13%
DAVINCI13%
Vitamatic6%
Designs for Health4%
Open — no brand owns it (5 brands, 11%)

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — -5.2% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top adk search terms

adk39K/yr +8.6%13.6% conv.
adk vitamin supplement41K/yr -28.9%11.1% conv.
vitamin adk23K/yr -0.5%8.7% conv.
biote adk 510K/yr +8.3%21.6% conv.
adk 58K/yr +17.4%16.9% conv.
vitamin a d k7K/yr -5.2%7.8% conv.
a d k vitamin supplement5K/yr +14.8%8.6% conv.
adk supplement4K/yr +24.9%7.1% conv.
adk vitamins4K/yr +7.3%9.6% conv.
davinci laboratories4K/yr -15.0%1.3% conv.

All search terms

Top adk 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 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

NatureGenX ADK Vitamin Supplement Vitamins A D3 & K2 MK-7 for Bone Health & Calcium Absorption Gluten-Free Non-GMO Soy-Free 60 Capsules (2-Month Supply)

NatureGenX$21.404.8★1,285 rev

Biote Nutraceuticals - ADK 5 - Immunity + Cardiovascular (90 Capsules)

Biote$48.774.9★657 rev

Codeage ADK Vitamins Supplement - Essential Vitamin A D3 5000 IU K1 & K2 (MK4 & MK7) - 6-Month Supply - 1 Capsule per Serving Non-GMO Gluten-Free - 180 Capsules

Codeage$40.544.7★2,201 rev

Biote Nutraceuticals - ADK 10 - Immunity + Cardiovascular (90 Capsules)

Biote$48.814.8★1,660 rev

DAVINCI Labs ADK - Helps Support Bone Heart & Immune Health - Dietary Supplement with Vitamins A D3 & K2 (as MK-7) - Vegetarian Gluten Free & Soy Free - 60 Capsules

DAVINCI$37.214.7★1,221 rev

Newest

by launch date

Vitamatic ADK Vitamin Supplement 180 Veg Capsules High Potency Vitamins A D3 K2 for Bone Health Calcium Absorption Non-GMO Gluten Free

Vitamatic$19.41265 rev

1y ago

High Absorption ADK Vitamin Supplement - Vegan Vitamin D3 K2 MK7 & A for Calcium Regulation plus Bone Heart Thyroid & Immune Support - Vitamin ADK with 5000IU D3 Non GMO & Gluten Free (2 Months)

NEXGEN BLENDS$19.38214 rev

1y ago

Natures Truth Vitamin ADK | 60 Softgels

Nature's Truth$12.86266 rev

3y ago

DAVINCI Labs ADK - Helps Support Bone Heart & Immune Health - Dietary Supplement with Vitamins A D3 & K2 (as MK-7) - Vegetarian Gluten Free & Soy Free - 30 Capsules

DAVINCI$19.781,221 rev

3y ago

ADK 5 Vitamin Supplement with Olive Oil Once Daily 90 Liquid Capsules

ALPHA RISE$25.01108 rev

4y ago

What buyers say about adk

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

What buyers love

Quality-Overall24%

“This brand is wonderful and well tolerated”

Vitamin22%

“This is by far the best vitamin supplement Ive ever used”

Value For Money7%

“Worth the money”

Advertised Vs Actual Product5%

“Does what it has to do”

Dosage4%

“My levels are always great”

Efficiency4%

“Works great”

Ease Of Chewing/Swallowing4%

“Easy to swallow”

Immunity Booster3%

“Great for my immune system”

Durability3%

“Solid and dependable”

Accuracy-Overall2%

“Timely”

What buyers complain about

Smell11%

“recent bottles smell absolutely terrible”

Dosage7%

“do not take them”

Adhesion/Stickiness7%

“sticks together hard to shake one loose”

Ease Of Use5%

“those can be a hassle”

Size-Overall4%

“They are small”

Color Fading/Discoloration4%

“Some were discolored”

Taste-Overall4%

“they dont have an taste”

Value For Money4%

“It's expensive for only a 90-day supply”

Vitamin3%

“But I have to stopped using it due to the fact that the amount of vitamin D is too high”

Nutritional Content3%

“If youre taking them on an empty stomach youre wasting good money”

Top return reasons

Dosage100%

Common questions

Is adk profitable to sell on Amazon United States?: The niche generates $669K/yr across 16 tracked products. 90-day search growth is -5.2%. Flapen's verdict: Worth a look (55/100).
How competitive is the adk niche?: 11 brands and 21 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 84% of demand.
What do buyers complain about in adk?: Top complaints mined from reviews: Smell, Dosage, Adhesion/Stickiness. The return rate is 0.0%.
When does demand for adk peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the adk niche?: Listings span $12.86–$59.16; the average listing price is $32.01 (sweet spot $15–$100). The average incumbent carries 764 reviews — the moat a new listing must climb.

adk