Is vitamin d3 k2 profitable to sell on Amazon United Kingdom?

The niche generates £1.3M/yr across 5 tracked products. 90-day search growth is -29.2%. Flapen's verdict: Skip it (38/100).

How competitive is the vitamin d3 k2 niche?

4 brands and 21 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in vitamin d3 k2?

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

When does demand for vitamin d3 k2 peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 2.8× the quietest.

What does it cost to enter the vitamin d3 k2 niche?

Listings span £5.64–£8.40; the average listing price is £7.02 (sweet spot $15–$100). The average incumbent carries 7,985 reviews — the moat a new listing must climb.

vitamin d3 k2

Skip it

A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible15.8%

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

Market size

Great£1.3M

£1.3M/yr · 1.2M searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad7,984.8

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£7.02

avg listing price — sweet spot $15–$100

Growth

Bad-29.2%

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

Competition

Bad100%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Price range

Bad£5.64–£8.40

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

According to Flapen's Amazon United Kingdom niche tracking, vitamin d3 k2 is a £1.3M/yr Amazon United Kingdom market (1.2M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 38/100.

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

vitamin d3 k2 market data

Units sold / yr: 150K–200K; avg 30,000–40,000/product
Revenue / yr: £1.1M–£1.4M; units × avg price
Conversion rate: 15.8%
Avg BSR: #8
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 49 months
Avg seller age: 162 days

Competition & brand share

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

Brands

4 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

Nutrition Geeks58%
WeightWorld20%
EVO NUTRITION16%
BetterYou6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -29.2% search growth over the last 90 days.

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

Open Trend

Top vitamin d3 k2 search terms

vitamin d3 k2718K/yr -29.7%11.7% conv.
d3 and k2 vitamin145K/yr -21.2%12.2% conv.
d3 k249K/yr -27.0%9.2% conv.
vit d3 k241K/yr -37.0%11.5% conv.
vitamin d k240K/yr -39.2%10.4% conv.
vitamin d and k224K/yr -42.0%9.6% conv.
nutrition geeks vitamin d22K/yr -39.2%10.9% conv.
vitamin d3 and k221K/yr -36.5%9.1% conv.
nutrition geeks vitamin d3 k216K/yr -17.9%26.6% conv.
k2 d39K/yr +34.5%11.2% conv.

All search terms

Top vitamin d3 k2 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 5 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Vitamin D3 4000 iu & Vitamin K2 MK7 100g - 1 Year Supply 365 Easy-Swallow Vitamin D3 K2 Tablets 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements UK Made Vitamin D Tablets

Nutrition Geeks£7.954.6★17,521 rev

Vitamin D3 4000IU & K2 125g (MK7) - 365 VIT D Tablets - 1 Year Supply

WeightWorld£8.404.6★4,958 rev

EVO NUTRITION£5.674.6★8,749 rev

Vitamin D3 4000iu & Vitamin K2 100ug MK7 | 400 Vegetarian Tablets - 1 Year Supply | Cholecalciferol & Menaquinone | Made in the UK

EVO NUTRITION£7.464.7★2,604 rev

BetterYou Vitamin D3 K2 Oral Spray Fast Acting Vitamin D 3000 IU + Vitamin K2 (MK7) Supplement Supports Bones Teeth Immune System & Blood Clotting 1-Month Supply Natural Peppermint Flavour

BetterYou£5.644.5★6,092 rev

Newest

by launch date

Vitamin D3 4000 iu & Vitamin K2 MK7 100g - 1 Year Supply 365 Easy-Swallow Vitamin D3 K2 Tablets 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements UK Made Vitamin D Tablets

Nutrition Geeks£7.9517,521 rev

2y ago

Vitamin D3 4000iu & Vitamin K2 100ug MK7 | 400 Vegetarian Tablets - 1 Year Supply | Cholecalciferol & Menaquinone | Made in the UK

EVO NUTRITION£7.462,604 rev

4y ago

Vitamin D3 4000IU & K2 125g (MK7) - 365 VIT D Tablets - 1 Year Supply

WeightWorld£8.404,958 rev

6y ago

EVO NUTRITION£5.678,749 rev

6y ago

BetterYou Vitamin D3 K2 Oral Spray Fast Acting Vitamin D 3000 IU + Vitamin K2 (MK7) Supplement Supports Bones Teeth Immune System & Blood Clotting 1-Month Supply Natural Peppermint Flavour

BetterYou£5.646,092 rev

8y ago

What buyers say about vitamin d3 k2

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

What buyers love

Vitamin19%

“Essential vitamins”

Quality-Overall19%

“Good quality and easy to swallow”

Value For Money17%

“Good Price”

Ease Of Chewing/Swallowing9%

“Perfect for people who struggle to swallow them”

Advertised Vs Actual Product7%

“As advertised”

Ease Of Use5%

“Easy to use”

Side Effects2%

“Havent noticed any negative side effects”

Taste-Overall2%

“no nasty taste or side affects”

Dosage2%

“Good Dosage”

Efficiency2%

“Effective”

What buyers complain about

Size-Overall13%

“Packet is very tiny”

Dosage13%

“High dose can cause health issues”

Vitamin7%

“Not the right type of Vitamin D for me I guess”

Functionality-Overall4%

“Doesn't seem to work”

Side Effects4%

“Gives me headache”

Taste-Overall4%

“the spray has a really bad taste”

Advertised Vs Actual Product3%

“Misleading advertising”

Value For Money3%

“Cheap for a reason”

Nutritional Content3%

“do not purchase from nutrition geeks”

Ingredients-Overall3%

“however I wont repeat order anymore as Ive realised this brand of products contain silicon dioxide”

Top return reasons

Vitamin50%

Ingredients-Overall50%

Common questions

Is vitamin d3 k2 profitable to sell on Amazon United Kingdom?: The niche generates £1.3M/yr across 5 tracked products. 90-day search growth is -29.2%. Flapen's verdict: Skip it (38/100).
How competitive is the vitamin d3 k2 niche?: 4 brands and 21 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in vitamin d3 k2?: Top complaints mined from reviews: Size-Overall, Dosage, Vitamin. The return rate is 0.1%.
When does demand for vitamin d3 k2 peak?: Demand peaks in Sep–Oct–Nov; the busiest month runs 2.8× the quietest.
What does it cost to enter the vitamin d3 k2 niche?: Listings span £5.64–£8.40; the average listing price is £7.02 (sweet spot $15–$100). The average incumbent carries 7,985 reviews — the moat a new listing must climb.