---
title: "Fish Oil Liquid — £81K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/fish-oil-liquid"
last_updated: "2026-07-31T11:41:54.114Z"
locale: en
meta:
description: "Niche score 46/100 · £81K/yr market · 51K searches/yr · £21.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · £81K/yr market · 51K searches/yr · £21.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Fish Oil Liquid — £81K/yr Amazon UK Niche (2026) - Flapen"
---
# **fish oil liquid**
**Skip it**
Soft demand (-26.4% this quarter) — this niche doesn't clear our bar today.
Market size 20Growth 12Conversion 77Competition 49Returns 100Price range 82Avg price 91Brand share 28Review moat 46Quality gap 25
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£21.27**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£8.80–£47.98**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****7.5%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****56%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****1,946.88**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****£81K**
£81K/yr · 51K searches
**Growth**
**Bad****-26.4%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, fish oil liquid is a £81K/yr Amazon United Kingdom market (51K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Aug–Sep–Oct. Verdict: Skip it — 46/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fish oil liquid market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **£64K–£85K**
- units × avg price
- **Conversion rate**
- **7.5%**
- **Avg BSR**
- **#68**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **92%**
- **Out of stock**
- **1.1%**
- **Avg brand age**
- **75 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▼falling
**Sellers**
**94**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 96%
**Open market**
**7%**
- MÖLLER'S51% - Inner Vitality17% - Natures Aid11% - Nordic Supplements5% - Sevenseas5% - Wiley's Finest5% - Open — no brand owns it (4 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -26.4% search growth over the last 90 days.
4K3KSpike '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep, Oct · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/fish-oil-liquid/trend)
## **Top fish oil liquid search terms**
- **mollers omega 3**14K/yr-28.0%8.0% conv. - **omega 3 liquid**8K/yr-21.0%5.3% conv. - **fish oil liquid**8K/yr-26.5%5.6% conv. - **omega 3 fish oil liquid**7K/yr-24.8%6.4% conv. - **liquid fish oil**5K/yr-16.5%3.8% conv. - **mollers**6K/yr-36.8%7.2% conv. - **mollers cod liver oil**3K/yr-34.0%9.1% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/fish-oil-liquid/search-terms)
## **Top fish 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.
0%4%£3K8%£6K12%£10K16%£13K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Omega 3 Fish Oil Liquid - Natural Fresh Lemon Flavour with NO Fishy Taste High Strength DHA/EPA - 200ml Made from Wild Caught Nordic Fish Oil | 3rd Party Tested for Purity - Inner Vitality**Inner Vitality**£15.83**4.7★464 rev](https://www.amazon.co.uk/dp/B09HTFVR4Z) [2**Mollers | Omega 3 Cod Liver Oil | Omega-3 Dietary Supplements with EPA DHA Vitamin A D and E | Superior Taste Award | Pure & Natural cod Liver Oil | Lemon | 250 ml**MÖLLER'S**£15.18**4.7★3,280 rev](https://www.amazon.co.uk/dp/B084P77F7B) [3**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**£9.36**4.5★1,009 rev](https://www.amazon.co.uk/dp/B003VJN2SY) [4**Mollers | Omega 3 Cod Liver Oil | Nordic Omega 3 Dietary Supplement with EPA DHA Vitamin A D E | Superior Taste Award | High Purity Natural Cod Liver Oil | 165 Year Old Brand | Lemon | 500 ml**MÖLLER'S**£24.97**4.7★3,280 rev](https://www.amazon.co.uk/dp/B0CBT3S3CS) [5**Mollers | Cod Liver Oil Capsules | Omega 3 Fatty Acids DHA & EPA Contains Vitamin A D & E Supports Immune System Heart Function Brain Function & Vision | 160 Units**MÖLLER'S**£13.42**4.5★4,564 rev](https://www.amazon.co.uk/dp/B0F1953SXT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Mollers | Cod Liver Oil Capsules | Omega 3 Fatty Acids DHA & EPA Contains Vitamin A D & E Supports Immune System Heart Function Brain Function & Vision | 160 Units**MÖLLER'S**£13.42**4,564 rev9mo ago](https://www.amazon.co.uk/dp/B0F1953SXT) [**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**£13.74**65 rev9mo ago](https://www.amazon.co.uk/dp/B0FT4PLF62) [**Mollers | Omega 3 Cod Liver Oil | Omega-3 Dietary Supplements with EPA DHA Vitamin A D and E | Superior Taste Award | Pure & Natural cod Liver Oil | Lemon | 250 ml x 3**MÖLLER'S**£32.30**3,280 rev1y ago](https://www.amazon.co.uk/dp/B0CXGMSCYJ) [**Nordic Supplements High Strength 200ml Omega 3 Fish Oil. Taste Award Winning Lemon Flavoured and Tested.**Nordic Supplements**£15.38**31 rev1y ago](https://www.amazon.co.uk/dp/B0DNN51XN1) [**Mollers | Omega 3 Jellies for Children | Strawberry | 72 Capsules**MÖLLER'S**£19.40**3,788 rev2y ago](https://www.amazon.co.uk/dp/B0CXH6KR9D)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**£13.74**4.5★**▲ 172%**](https://www.amazon.co.uk/dp/B0FT4PLF62) [**Wileys Finest Liquid Omega-3 Fish Oil 250ml (50 Servings)**Wiley's Finest**£30.05**4.5★**▲ 134%**](https://www.amazon.co.uk/dp/B01GOGR5V0) [**Mollers | Omega 3 Cod Liver Oil | Omega-3 Dietary Supplements with EPA DHA Vitamin A D and E | Superior Taste Award | Pure & Natural cod Liver Oil | Lemon | 250 ml x 3**MÖLLER'S**£32.30**4.7★**▲ 63%**](https://www.amazon.co.uk/dp/B0CXGMSCYJ) [**Mollers | Omega 3 Jellies for Children | Strawberry | 72 Capsules**MÖLLER'S**£19.40**4.8★**▲ 46%**](https://www.amazon.co.uk/dp/B0CXH6KR9D) [**Omega 3 Fish Oil Liquid - Natural Fresh Lemon Flavour with NO Fishy Taste High Strength DHA/EPA - 400ml Made from Wild Caught Nordic Fish Oil | 3rd Party Tested for Purity - Inner Vitality (2-Pack)**Inner Vitality**£25.90**4.7★**▲ 33%**](https://www.amazon.co.uk/dp/B0BS6JFYWV)
**~~View all trending →~~**
## **What buyers say about fish oil liquid**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**27%
*“Excellent Product”*
**Taste-Overall**21%
*“Tastes just like any other brand”*
**Value For Money**9%
*“reasonable price”*
**Ease Of Use**5%
*“is good to use”*
**Flavor**5%
*“My kids are very happy with the flavour”*
**Nutritional Content**3%
*“this type of fish oil is literally the best supplement money can buy for your health”*
**Vitamin**2%
*“Good supplement”*
**Smell**2%
*“just a pleasant lemon zesty aroma”*
**Ease Of Chewing/Swallowing**2%
*“easy for my child to eat”*
**Joint Pain**1%
*“This has helped my hip joint”*
### **What buyers complain about **
**Taste-Overall**22%
*“Tasted very artificial to me”*
**Smell**11%
*“The smell is disgusting”*
**Value For Money**8%
*“They are expensive”*
**Oily/Greasy**6%
*“barely oily”*
**Advertised Vs Actual Product**4%
*“False description - FISHY smell and taste”*
**Quality-Overall**3%
*“Disappointing quality”*
**Flavor**2%
*“then you get a bubble gum flavour after taste”*
**Ingredients-Overall**2%
*“they would not take accountability for the ingredients or even send it back”*
**Heart Health**2%
*“i am afraid it gave me dreadful heartburn so i stopped”*
**Functionality-Overall**2%
*“Its not very effective”*
## **Common questions**
- **Is fish oil liquid profitable to sell on Amazon United Kingdom?**
- The niche generates £81K/yr across 24 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -26.4%. Flapen's verdict: Skip it (46/100).
- **How competitive is the fish oil liquid niche?**
- 10 brands and 94 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in fish oil liquid?**
- Top complaints mined from reviews: Taste-Overall, Smell, Value For Money. The return rate is 0.1%.
- **When does demand for fish oil liquid peak?**
- Demand peaks in Aug–Sep–Oct; the busiest month runs 2.2× the quietest.
- **What does it cost to enter the fish oil liquid niche?**
- Listings span £8.80–£47.98; the average listing price is £21.27 (sweet spot $15–$100). The average incumbent carries 1,947 reviews — the moat a new listing must climb.
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