Is vitamin d 1000iu profitable to sell on Amazon United Kingdom?

The niche generates £220K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -46.6%. Flapen's verdict: Skip it (36/100).

How competitive is the vitamin d 1000iu niche?

11 brands and 66 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 85% of demand.

What do buyers complain about in vitamin d 1000iu?

Top complaints mined from reviews: Size-Overall, Dosage, Taste-Overall. The return rate is 0.1%.

When does demand for vitamin d 1000iu peak?

Demand peaks in Jan–Oct; the busiest month runs 2.9× the quietest.

What does it cost to enter the vitamin d 1000iu niche?

Listings span £3.13–£10.36; the average listing price is £6.05 (sweet spot $15–$100). The average incumbent carries 5,569 reviews — the moat a new listing must climb.

vitamin d 1000iu

Skip it

Prices mostly outside the sweet spot ($3.13–$10.36) — this niche doesn't clear our bar today.

Conversion

Incredible20.4%

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

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Market size

Okay£220K

£220K/yr · 178K searches

Brand share

Okay85%

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

Review moat

Bad5,568.82

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Avg price

Bad£6.05

avg listing price — sweet spot $15–$100

Competition

Bad85%

top-5 click share — a locked-up shelf

Growth

Bad-46.6%

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

Price range

Bad£3.13–£10.36

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

According to Flapen's Amazon United Kingdom niche tracking, vitamin d 1000iu is a £220K/yr Amazon United Kingdom market (178K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Jan–Oct. Verdict: Skip it — 36/100.

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

vitamin d 1000iu market data

Units sold / yr: 30K–40K; avg 2,500–3,000/product
Revenue / yr: £182K–£242K; units × avg price
Conversion rate: 20.4%
Avg BSR: #70
Page quality: 0%
Prime: 100%
Sponsored: 91%
Out of stock: 0.0%
Avg brand age: 70 months
Avg seller age: 162 days

Competition & brand share

The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 rising

Sellers

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

85%

Top 20: 100%

Open market

11%

Vitabiotics Ultra36%
Nutrition Geeks23%
VitaPremium9%
Fultium8%
Incite Nutrition8%
Nu U Nutrition5%
Open — no brand owns it (5 brands, 11%)

Demand & seasonality

Weekly Amazon search volume, last 101 weeks — -46.6% search growth over the last 90 days.

Peak months: Jan, Oct · busiest ÷ quietest = 2.9×

Open Trend

Top vitamin d 1000iu search terms

vitamin d 1000iu80K/yr -44.6%18.2% conv.
vitamin d3 1000 iu31K/yr -31.3%15.5% conv.
vitamin d 100015K/yr -46.5%16.8% conv.
vitamin d 25mcg/1000iu6K/yr -18.3%19.1% conv.
vitamin d tablets 1000iu8K/yr -49.6%20.2% conv.
vitamin d 1000 iu8K/yr -60.7%17.9% conv.
vitamin d3 1000iu7K/yr -65.1%12.8% conv.
vit d 1000iu5K/yr -45.8%16.5% conv.
vitamin d 25mcg3K/yr -26.4%19.7% conv.
ultra vitamin d 1000iu4K/yr -55.6%36.8% conv.

All search terms

Top vitamin d 1000iu 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 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Vitamin D Tablets 1000IU Vitabiotics Ultra

Vitabiotics Ultra£3.134.7★25,174 rev

Vitamin D 1000iu - 1 Year Supply 365 Easy-Swallow Vitamin D Tablets Vegetarian D3 High Strength Immune Support Supplement - Awarded by The Independent UK

Nutrition Geeks£5.754.6★6,925 rev

Vitamin D 1 000 IU Optimal Strength Vitamin D3 Supplement 365 Easy to Swallow Softgels - Full Year Supply

VitaPremium£7.884.7★656 rev

Fultium£3.374.6★56 rev

Vitamin D 1000iu - 1+ Year Supply - High Strength 400 Easy Swallow Tablets - One a Day High Strength Cholecalciferol VIT D3 - Vegetarian Supplement - Microtablets - Made in UK

Incite Nutrition£7.114.6★6,903 rev

Newest

by launch date

Fultium£3.3756 rev

5mo ago

Zipvit Vitamin D 1000IU 1 Year Supply 365 Vegetarian D3 Tablets High Absorption Easy-to-Swallow Vitamin D Tablets for Immune Bone & Muscle Health

Zipvit£6.1085 rev

1y ago

Vitamin D3 1000iu - 1 Year Supply 365 Easy-Swallow VIT D Tablets Vegetarian Optimal Strength Immune Support Supplement

Right Choice Supplements£3.49858 rev

3y ago

Vitamin D 1 000 IU Optimal Strength Vitamin D3 Supplement 365 Easy to Swallow Softgels - Full Year Supply

VitaPremium£7.88656 rev

4y ago

Vitamin D 1000iu - 1+ Year Supply - High Strength 400 Easy Swallow Tablets - One a Day High Strength Cholecalciferol VIT D3 - Vegetarian Supplement - Microtablets - Made in UK

Incite Nutrition£7.116,903 rev

5y ago

What buyers say about vitamin d 1000iu

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

What buyers love

Vitamin19%

“Excellent vitamin D3 supplements”

Value For Money19%

“Good price”

Ease Of Chewing/Swallowing15%

“swallow - what a bonus”

Quality-Overall13%

“Good quality”

Advertised Vs Actual Product5%

“Does the job”

Ease Of Use3%

“theyre easy to open”

Energy Level2%

“They help with energy”

Dosage2%

“dosage is practical for consistent”

Side Effects1%

“Amazing, iv been feeling unwell for over 6 month's, feeling dizzy light in my feet weird feeling in my legs,I had test done and had very low vitamin D levels, I brought this product and had this 3 days and I can honestly say the past 3 days iv feel normal again,its got to be this product cud iv had nothing els,and only received this 3 days ago and since then iv felt so good for once,I cant believe it myself,easy to swallow, little tablet and there vegan friendly”

Taste-Overall1%

“don't taste bad”

What buyers complain about

Size-Overall16%

“its a small bottle”

Dosage7%

“High dose”

Taste-Overall7%

“It doesnt have a funny taste”

Vitamin5%

“I absolutely do not get enough vitamin D”

Strength3%

“Welness”

Vegan/Organic2%

“so it is not suitable for vegetarians or vegans”

Ease Of Chewing/Swallowing1%

“Pill size is very tinny east to swallow”

Energy Level1%

“They honestly didn't make a difference for me energy, bone wise”

Magnesium1%

“there just enough magnesium in each serving even after your take the recommended dose”

Absorbency1%

“your body will not absorb the amount you think it is in the daily dose”

Common questions

Is vitamin d 1000iu profitable to sell on Amazon United Kingdom?: The niche generates £220K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -46.6%. Flapen's verdict: Skip it (36/100).
How competitive is the vitamin d 1000iu niche?: 11 brands and 66 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 85% of demand.
What do buyers complain about in vitamin d 1000iu?: Top complaints mined from reviews: Size-Overall, Dosage, Taste-Overall. The return rate is 0.1%.
When does demand for vitamin d 1000iu peak?: Demand peaks in Jan–Oct; the busiest month runs 2.9× the quietest.
What does it cost to enter the vitamin d 1000iu niche?: Listings span £3.13–£10.36; the average listing price is £6.05 (sweet spot $15–$100). The average incumbent carries 5,569 reviews — the moat a new listing must climb.