Is cod liver oil liquid profitable to sell on Amazon United Kingdom?

The niche generates £111K/yr across 9 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -22.5%. Flapen's verdict: Skip it (43/100).

How competitive is the cod liver oil liquid niche?

8 brands and 83 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 86% of demand.

What do buyers complain about in cod liver oil liquid?

Top complaints mined from reviews: Taste-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.0%.

When does demand for cod liver oil liquid peak?

Demand peaks in Oct; the busiest month runs 1.6× the quietest.

What does it cost to enter the cod liver oil liquid niche?

Listings span £9.36–£24.97; the average listing price is £14.43 (sweet spot $15–$100). The average incumbent carries 1,051 reviews — the moat a new listing must climb.

cod liver oil liquid

Skip it

A concentrated shelf (top 5 take 84% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great11.4%

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

Avg price

Good£14.43

avg listing price — sweet spot $15–$100

Price range

Good£9.36–£24.97

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

Review moat

Good1,050.89

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay86%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Okay£111K

£111K/yr · 67K searches

Growth

Bad-22.5%

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

Competition

Bad84%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United Kingdom niche tracking, cod liver oil liquid is a £111K/yr Amazon United Kingdom market (67K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in Oct. Verdict: Skip it — 43/100.

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

cod liver oil liquid market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: £87K–£115K; units × avg price
Conversion rate: 11.4%
Avg BSR: #31
Page quality: 0%
Prime: 78%
Sponsored: 78%
Out of stock: 7.1%
Avg brand age: 100 months
Avg seller age: 171 days

Competition & brand share

The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

84%

Top 20: 100%

Open market

Natures Aid37%
Sevenseas22%
Simply Supplements11%
MÖLLER'S8%
Gold Label8%
POWER HEALTH6%
Open — no brand owns it (2 brands, 7%)

Demand & seasonality

Weekly Amazon search volume, last 89 weeks — -22.5% search growth over the last 90 days.

Peak months: Oct · busiest ÷ quietest = 1.6×

Open Trend

Top cod liver oil liquid search terms

cod liver oil liquid60K/yr -22.2%9.2% conv.
cod liver oil liquid seven seas3K/yr -25.8%5.2% conv.
seven seas cod liver oil liquid4K/yr -23.6%7.9% conv.

All search terms

Top cod liver oil liquid 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 9 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Natures Aid Cod Liver Oil Liquid 500ml - High Strength Omega-3 Fish Oil with Vitamins A & D - Supports Immune System Heart Health Brain Function and Vision - Non-GMO - Purity Guaranteed

Natures Aid£9.364.5★1,009 rev

Seven Seas Omega-3 Fish Oil Plus Cod Liver Oil MAX Strength with Omega-3 Vitamins D and Vitamin E. Food Supplement for Brain2 & Body1-4 Support 450ml Liquid

Sevenseas£13.744.5★65 rev

Cod Liver Oil Liquid | 300ml | 60 Servings | Made in the UK

Simply Supplements£11.234.4★43 rev

GOLD LABEL COD LIVER OIL

Gold Label£15.684.6★292 rev

Icelandic Gold Cod Liver Oil Liquid (Pack of 1) by Power Health | 500ml of Premium Omega 3 Fish Oil with Vitamin A and D | Codliver Oil with Omega 3 Essential Fatty acids Including EPA and DHA

POWER HEALTH£12.974.6★134 rev

Newest

by launch date

Seven Seas Omega-3 Fish Oil Plus Cod Liver Oil MAX Strength with Omega-3 Vitamins D and Vitamin E. Food Supplement for Brain2 & Body1-4 Support 450ml Liquid

Sevenseas£13.7465 rev

9mo ago

Bugalugs Cod liver Oil for Dogs & Cats EPA & DHA Fish Oil for Dogs Skin & Coat dog supplements health supplies for dogs more omega 3 for dogs than salmon oil for dogs uk (255ml Cod Liver Oil)

BUGALUGS£11.11201 rev

1y ago

MÖLLER'S£24.973,280 rev

3y ago

MÖLLER'S£15.183,280 rev

5y ago

Cod Liver Oil Liquid | 300ml | 60 Servings | Made in the UK

Simply Supplements£11.2343 rev

5y ago

What buyers say about cod liver oil liquid

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

What buyers love

Quality-Overall22%

“5* Good quality and easy to take”

Value For Money18%

“reasonable price”

Taste-Overall17%

“Tastes just like any other brand”

Pet Friendly4%

“goes a long way for dogs”

Flavor4%

“yum yum yummy i will keep buying this because it tastes so nice”

Ease Of Use3%

“Very easy to use”

Nutritional Content2%

“a perfect addition to salads”

Energy Level2%

“after a few days of use I felt an energy boost”

Ingredients-Overall2%

“Excellent product, very good lemon taste, you can't feel and smell the fish oil taste at all”

Freshness1%

“A testament to the quality, preparation, storage and freshness of it”

What buyers complain about

Taste-Overall19%

“Way too fishy taste”

Value For Money10%

“Price is ridiculously high for a smaller bottle”

Advertised Vs Actual Product9%

“Misleading advert”

Smell6%

“Practically no smell: Strange”

Oily/Greasy5%

“oil”

Functionality-Overall3%

“Its not very effective”

Material Quality3%

“The issue of micro plastics is worrying”

Leak-Proof3%

“There was a crack in the top 1/4 of the bottle which leaked”

Flavor3%

“Flavour not great”

Dosage3%

“Sadly I couldnt take this as the lemon repeated on all day”

Top return reasons

Advertised Vs Actual Product50%

Leak-Proof50%

Common questions

Is cod liver oil liquid profitable to sell on Amazon United Kingdom?: The niche generates £111K/yr across 9 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -22.5%. Flapen's verdict: Skip it (43/100).
How competitive is the cod liver oil liquid niche?: 8 brands and 83 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in cod liver oil liquid?: Top complaints mined from reviews: Taste-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.0%.
When does demand for cod liver oil liquid peak?: Demand peaks in Oct; the busiest month runs 1.6× the quietest.
What does it cost to enter the cod liver oil liquid niche?: Listings span £9.36–£24.97; the average listing price is £14.43 (sweet spot $15–$100). The average incumbent carries 1,051 reviews — the moat a new listing must climb.