How competitive is the Vitamin D 400iu niche on Amazon United Kingdom?

4 brands and 16 sellers compete in Vitamin D 400iu on Amazon United Kingdom. The top 5 Vitamin D 400iu products take 100% of clicks and its top 5 brands hold 100% of demand.

What do buyers complain about in Vitamin D 400iu?

Vitamin D 400iu buyers on Amazon United Kingdom complain most about Size-Overall, Dosage, Vitamin, the themes mined from the niche's reviews. Its return rate is 0.0%.

What does it cost to enter the Vitamin D 400iu niche?

Vitamin D 400iu sells for £4.03 on average on Amazon United Kingdom, outside our $15–$100 sweet spot. Listings span £2.63–£7.03. The average incumbent carries 1,793 reviews — the moat a new listing must climb.

Vitamin D 400iu

a concentrated shelf (top 5 take 100% of clicks) — Vitamin D 400iu doesn't clear our bar today.

Flapen Score

Skip it

This niche Category average

Is Vitamin D 400iu profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Vitamin D 400iu is a £39K/yr Amazon United Kingdom market (55K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Oct–Nov. Verdict: Skip it — 27/100.

Vitamin D 400iu: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -49.0% over the last 90 days and 17.5% of searches end in a purchase.

£39K

revenue / yr

Units sold / yr13K

Search volume / yr-49.0%55K

Conversion rate17.5%

Avg price£4.03

Who owns the niche?

The top 5 brands hold 100% of demand, so 0% of the market is open.

open market share

Brands · sellers4 · 16

Top-5 product click share100%

Open market0%

Avg brand age79 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.6★ — the gap to enter on.

0/100

page quality · 4 products

Top Vitamin D 400iu products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Top sellers

by 90-day click share

Vitamin D Tablets 400IU Vitabiotics Ultra

Price: £2.63
Rating: 4.7/5
Reviews: 1,658
Age: 2y ago

Fultium Vitamin D3 400 IU 10g |90 Tablets|Recommended Daily Dose Vitamin D Supplement | Immune Bone & Muscle Support | from The UKs No.1 Vitamin D Prescription Brand | Vegetarian | Food Supplement

Price: £2.80
Rating: 4.6/5
Reviews: 58
Age: 5mo ago

Natures Aid Vitamin D3 10g (400IU) High Strength Vitamin D Supplement Supports Bones Muscles & Immunity Vegan Gluten-Free Non-GMO 90 Tablets Essential Daily Nutrient

Price: £3.65
Rating: 4.6/5
Reviews: 5,083
Age: 17y ago

Certified Vegan 400IU Vitamin D3 120 Days Tablets for Pregnancy Nursing and Seniors - NHS Approved

Price: £7.03
Rating: 4.5/5
Reviews: 374
Age: 4y ago

Newest

by launch date

Fultium Vitamin D3 400 IU 10g |90 Tablets|Recommended Daily Dose Vitamin D Supplement | Immune Bone & Muscle Support | from The UKs No.1 Vitamin D Prescription Brand | Vegetarian | Food Supplement

Price: £2.80
Rating: 4.6/5
Reviews: 58
Age: 5mo ago

Vitamin D Tablets 400IU Vitabiotics Ultra

Price: £2.63
Rating: 4.7/5
Reviews: 1,658
Age: 2y ago

Certified Vegan 400IU Vitamin D3 120 Days Tablets for Pregnancy Nursing and Seniors - NHS Approved

Price: £7.03
Rating: 4.5/5
Reviews: 374
Age: 4y ago

Natures Aid Vitamin D3 10g (400IU) High Strength Vitamin D Supplement Supports Bones Muscles & Immunity Vegan Gluten-Free Non-GMO 90 Tablets Essential Daily Nutrient

Price: £3.65
Rating: 4.6/5
Reviews: 5,083
Age: 17y ago

Competition: brands, sellers & click share

The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.

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

Brands

4 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

Vitabiotics Ultra53%
Fultium23%
Natures Aid19%
PROHEALTH4%
Open — no brand owns it (0%)

Vitamin D 400iu demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume55KCVR17.5%Products4Brands4Top 5 Brands100%OOS Rate0.0%Rating4.6★Reviews1,793Avg BSR#41

Peak months: Jan, Feb, Oct, Nov · busiest ÷ quietest = 2.8×

Top Vitamin D 400iu search terms shoppers use

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

vitamin d 400iu19K/yr -54.1%17.5% conv.
vitamin d3 400iu8K/yr -61.2%10.9% conv.
vitamin d 400 iu7K/yr -36.0%20.5% conv.
vitamin d 10 micrograms10K/yr -60.3%12.4% conv.
vitamin d 10mcg5K/yr -18.1%20.1% conv.
vitamin d 10mg4K/yr -34.7%11.1% conv.
vitamin d 4003K/yr -17.2%18.7% conv.

What reviews say buyers love and hate about Vitamin D 400iu

What buyers mention most, as a share of all reviews.

What buyers love

81% of reviews

Value For Money29%

“Good Value”

Vitamin14%

“Overall, this seems like a good basic vitamin D supplement”

Ease Of Chewing/Swallowing13%

“ideal to swallow”

Quality-Overall10%

“Quality feels reliable and consistent, and the bottle has lasted well with regular use”

Advertised Vs Actual Product6%

“Does the job”

What buyers complain about

52% of reviews

Size-Overall14%

“The capsules are small”

Dosage11%

“Slightly bigger tablets than I expected for this dose”

Vitamin8%

“Don't get nearly enough vit D via the sun”

Functionality-Overall5%

“96 doesn't work”

Ease Of Chewing/Swallowing3%

“I find tablets are always harder to swallow than capsules”

Common Vitamin D 400iu questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Vitamin D 400iu 27/100 on Amazon United Kingdom — Skip it. The niche generates £39K/yr across 4 tracked products. 0 of 1 products launched in the last 360 days are still selling. Search demand moved -49.0% over the last 90 days.