Is vitamin d profitable to sell on Amazon United States?

The niche generates $27.0M/yr across 29 tracked products. 90-day search growth is +15.2%. Flapen's verdict: Worth a look (55/100).

How competitive is the vitamin d niche?

12 brands and 193 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 81% of demand.

What do buyers complain about in vitamin d?

Top complaints mined from reviews: Vitamin, Dosage, Size-Overall. The return rate is 0.0%.

When does demand for vitamin d peak?

Demand peaks in Jan–Dec; the busiest month runs 2.4× the quietest.

What does it cost to enter the vitamin d niche?

Listings span $6.34–$34.70; the average listing price is $13.32 (sweet spot $15–$100). The average incumbent carries 56,010 reviews — the moat a new listing must climb.

vitamin d

Worth a look

Shows a $27.0M/yr market, but a deep review moat (56,010 avg reviews) keeps it on the watch list.

Market size

Incredible$27.0M

$27.0M/yr · 90.6M searches

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Price range

Good$6.34–$34.70

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

Avg price

Good$13.32

avg listing price — sweet spot $15–$100

Competition

Good50%

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

Growth

Okay+15.2%

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

Brand share

Okay81%

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

Conversion

Okay2.2%

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

Quality gap

Bad4.8★

avg incumbent rating — lower means beatable quality

Review moat

Bad56,010.38

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, vitamin d is a $27.0M/yr Amazon United States market (90.6M searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Jan–Dec. Verdict: Worth a look — 55/100.

Data updated Aug 5, 2026 · scored weekly · How we score niches

vitamin d market data

Units sold / yr: 1.0M–1.0M; avg 80,000–100,000/product
Revenue / yr: $13.3M–$13.3M; units × avg price
Conversion rate: 2.2%
Avg BSR: #45
Page quality: 0%
Prime: 100%
Sponsored: 90%
Out of stock: 0.0%
Avg brand age: 68 months
Avg seller age: 149 days

Competition & brand share

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

193

Top-5 brand share

81%

Top 20: 100%

Top-5 click share

50%

Top 20: 90%

Open market

14%

Nature Made38%
NatureWise22%
Nature's Bounty10%
Bronson6%
NOW Foods5%
Nutricost4%
Open — no brand owns it (6 brands, 14%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +15.2% search growth over the last 90 days.

Peak months: Jan, Dec · busiest ÷ quietest = 2.4×

Open Trend

Top vitamin d search terms

vitamin d8.6M/yr -12.1%10.7% conv.
vitamin d33.6M/yr -2.5%12.3% conv.
vitamin d3 5000 iu1.0M/yr -5.5%14.8% conv.
d3 vitamin492K/yr -2.3%16.7% conv.
vitamina d288K/yr +1.5%3.0% conv.
vitamina d3174K/yr +10.5%3.4% conv.
vit d175K/yr -2.8%9.2% conv.
vit d3141K/yr -0.0%12.2% conv.
vitamin d supplements131K/yr +20.8%2.8% conv.
vitamina d3 para mujer100K/yr -1.3%2.9% conv.

All search terms

Top vitamin d 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

NatureWise Vitamin D3 5000IU Supplement Immune Support 360 Mini Softgels

NatureWise$13.604.7★195,696 rev

Nature Made Vitamin D3 1000 IU (25 mcg) 300 Vitamin D Softgels

Nature Made$10.794.8★60,500 rev

Nature Made Vitamin D3 1000 IU (25 mcg) 180 Vitamin D Softgels

Nature Made$8.674.8★60,500 rev

Natures Bounty Vitamin D3 5000 IU Softgels 240 Count

Nature's Bounty$14.744.8★83,838 rev

Sports Research Vegan Vitamin D3 + K2 w/Coconut Oil 60 Count Plantgels

Sports Research$22.124.8★54,253 rev

Newest

by launch date

Bronson Vitamin D3 5000iu (125mcg) Non-GMO Gluten-Free Soy-Free 360 Tablets

Bronson$9.542,941 rev

3y ago

Bronson Vitamin D3 10 000 IU (250 mcg) Immune & Muscle Support 360 Tablets

Bronson$9.5311,056 rev

3y ago

Nature Made Vitamin D3 K2 Supplement 30 Softgels

Nature Made$12.5310,717 rev

4y ago

NatureWise Vitamin D3 5000IU Supplement Bone & Immune Health 30 Softgels

NatureWise$6.34195,696 rev

5y ago

Nature Made Vitamin D3 5000 IU (125 mcg) 360 Vitamin D Softgels

Nature Made$26.4767,638 rev

6y ago

What buyers say about vitamin d

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

What buyers love

Vitamin23%

“Quality vitamin”

Quality-Overall19%

“the quality feels consistent”

Value For Money11%

“Very affordable”

Ease Of Chewing/Swallowing7%

“Easy to chew”

Advertised Vs Actual Product6%

“As advertised”

Taste-Overall3%

“No weird aftertaste or anything”

Ease Of Use3%

“Ease of use”

Efficiency3%

“Works well”

Nutritional Content2%

“Effective Supplement”

Dosage2%

“The dosage is convenient for daily use”

What buyers complain about

Vitamin12%

“BAD TASTING VITAMINGUMMIES”

Dosage7%

“Too high of a dose for me”

Size-Overall6%

“These are small”

Value For Money5%

“Not worth the price”

Taste-Overall4%

“Horrible after taste”

Advertised Vs Actual Product3%

“Very misleading”

Side Effects3%

“Makes you sick”

Ingredients-Overall3%

“Gross ingredients”

Functionality-Overall3%

“Cant provide results yet”

Allergies2%

“Can cause allergic reaction”

Top return reasons

Value For Money28%

Dosage16%

Vitamin11%

Ingredients-Overall6%

Functionality-Overall6%

Adhesion/Stickiness4%

Quality-Overall4%

Smell4%

Vegan/Organic3%