Skip to product information
1 of 1

  • Images are for illustration purposes only

Seven Seas Cod Liver Oil Max Strength - 150ml

Seven Seas Cod Liver Oil Max Strength - 150ml

  • 1. Ozempic®️-equivalent therapy now available for weight management
  • 2. Average weight loss of 17%, with 1 in 3 patients achieving over 20%
  • 3. May help reduce osteoarthritis-related pain
  • 4. Wegovy®️ is not expected to impact the effectiveness of oral contraceptives
  • 5. Supports cardiovascular risk reduction
  • 6. Over 22 million patients treated with semaglutide-based therapies since 2018

  • ✔️ Supplies EPA and DHA omega-3 to support normal heart function
  • ✔️ DHA contributes to normal brain function and vision maintenance
  • ✔️ Vitamin D supports bone health and immune system function
  • ✔️ Liquid format ideal for those who dislike swallowing capsules
  • ✔️ Max strength formula delivers higher omega-3 per daily teaspoon

Price Checker

Regular price £11.99
Sale price £11.99
Sale Sold out
  • Lowest price guarantee
  • Includes FREE private prescription
View full details

 

What Is Cod Liver Oil Max Strength and What Does It Do?

 

If you're looking for a straightforward way to top up your omega-3 intake, cod liver oil max strength from Seven Seas is one of the most established options available in the UK. This 150ml liquid supplement delivers a concentrated dose of omega-3 fatty acids — specifically EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — alongside vitamin A and vitamin D, all from a single daily teaspoon. It's a practical choice for anyone who struggles to eat oily fish two or more times a week, which is what the NHS recommends for maintaining healthy omega-3 levels.

Omega-3 fatty acids play a role in supporting normal heart function, and DHA in particular contributes to the maintenance of normal brain function and vision. Vitamin D supports bone health, muscle function, and the immune system — something especially relevant in the UK, where sunlight exposure is often insufficient for the body to produce adequate amounts, particularly during autumn and winter. You can explore a wider range of vitamins and supplements at Cured Pharmacy if you're building a broader health routine.

 

How Does Seven Seas Cod Liver Oil Max Strength Work?

 

The active components in this supplement each have distinct, well-documented roles in the body. Here's how they work together:

  • EPA and DHA (omega-3 fatty acids): These long-chain polyunsaturated fatty acids are incorporated into cell membranes throughout the body. EPA is associated with supporting cardiovascular health, while DHA is a structural component of the brain and retina.
  • Vitamin A (retinol): Supports normal vision, immune function, and the maintenance of skin and mucous membranes.
  • Vitamin D3: Helps the body absorb calcium and phosphorus, contributing to normal bone and muscle function. The NHS advises that adults consider a daily vitamin D supplement, particularly between October and March.

Because this is a liquid formulation, it may be absorbed slightly more readily than some encapsulated alternatives, though both forms are effective when taken consistently.

 

Who Should Consider Using Seven Seas Cod Liver Oil Max Strength?

 

This supplement is suitable for most healthy adults who want to support their intake of omega-3 fatty acids and fat-soluble vitamins. It's particularly relevant if you:

  • Rarely eat oily fish such as salmon, mackerel, or sardines
  • Want to support heart and brain health as part of a balanced lifestyle
  • Are concerned about low vitamin D levels, especially during winter months
  • Prefer a liquid supplement over capsules or tablets

It is not suitable for children under 12 without medical advice, and it should not be taken during pregnancy due to the vitamin A content. Always check with your pharmacist if you have an existing health condition.

 

How Does Seven Seas Cod Liver Oil Max Strength Compare to Standard Cod Liver Oil?

 

Feature Seven Seas Cod Liver Oil Max Strength 150ml Standard Cod Liver Oil Capsules
Omega-3 concentration Higher per serving (max strength formulation) Lower per capsule in standard-dose products
Form Liquid (5ml dose) Capsule (swallowed whole)
Vitamin A and D included Yes Yes (varies by brand)
Suitable for those who dislike swallowing capsules Yes No

 

Is Seven Seas Cod Liver Oil Max Strength Suitable for Long-Term Use?

 

For most healthy adults, taking cod liver oil max strength as part of a daily routine is considered safe when used at the recommended dose. Because the product contains vitamin A — a fat-soluble vitamin that accumulates in the body — it's important not to exceed the stated dose or combine it with other supplements containing retinol. If you're already taking a multivitamin, check the vitamin A content before adding this product.

Store the bottle in a cool, dry place away from direct sunlight, and refrigerate after opening. Use within three months of opening. If you're managing a long-term condition or taking prescription medicines, it's worth having a quick conversation with your pharmacist before starting. You might also find it helpful to browse our full vitamins and supplements range to see how this product fits alongside other options.

This product is a food supplement. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Seven Seas Cod Liver Oil Max Strength 150ml specifications
Treatment category Omega-3 and vitamin supplement
Mechanism of action Supplies EPA, DHA, vitamin A, and vitamin D to support cardiovascular, brain, bone, and immune health
Effective for Supporting omega-3 intake, heart health, brain function, bone health, and immune support
Suitable for Adults and children over 12 (not suitable in pregnancy)
Active ingredients Cod liver oil, EPA, DHA, Vitamin A (retinol), Vitamin D3
Pack size 150ml
UK classification Food supplement (General Sale)
Preparation Liquid
Route of administration Oral

Specifications of Seven Seas Cod Liver Oil Max Strength 150ml

 

What Is Seven Seas Cod Liver Oil Max Strength and What Is It Used For?

 

Seven Seas Cod Liver Oil Max Strength 150ml is a liquid dietary supplement derived from the livers of cod fish. It provides a concentrated source of omega-3 fatty acids — specifically EPA and DHA — along with vitamins A and D. It is used to help maintain adequate intake of these nutrients, particularly for people who do not regularly consume oily fish. The NHS notes that omega-3 fatty acids contribute to normal heart function, and DHA supports normal brain function and vision. Vitamin D is essential for bone health and immune function, and the NHS recommends that everyone in the UK consider a daily vitamin D supplement during autumn and winter.

 

What Do You Need to Know Before Using Seven Seas Cod Liver Oil Max Strength?

 

Before taking this supplement, there are some important safety points to be aware of. Do not use this product if any of the following apply to you:

  • You are pregnant or planning to become pregnant — high vitamin A (retinol) intake is associated with a risk of harm to the unborn baby
  • You are allergic to fish or fish products
  • You are already taking a supplement or multivitamin containing vitamin A or vitamin D — combining these may lead to excessive intake
  • You have hypervitaminosis A or D (excess vitamin A or D in the body)
  • You have hypercalcaemia (raised blood calcium levels)

The following medicines may interact with this product. Always tell your pharmacist or GP about all medicines and supplements you are taking:

  • Anticoagulants (e.g. warfarin): Omega-3 fatty acids may enhance the blood-thinning effect, increasing bleeding risk
  • Retinoid medicines (e.g. isotretinoin, acitretin): Combined use with vitamin A-containing supplements may increase the risk of vitamin A toxicity
  • Orlistat: May reduce the absorption of fat-soluble vitamins including A and D
  • Thiazide diuretics: May increase the risk of hypercalcaemia when taken alongside vitamin D

 

How Should You Use Seven Seas Cod Liver Oil Max Strength?

 

This supplement is straightforward to use. Follow these steps for best results:

  1. Shake the bottle well before each use to ensure the oil is evenly distributed.
  2. Measure out one 5ml teaspoon using the measuring spoon provided or a standard 5ml medicine spoon.
  3. Take the dose orally, either directly or mixed into a small amount of juice if preferred.
  4. Take with or just after a meal to reduce the likelihood of a fishy aftertaste or stomach discomfort.
  5. Replace the cap securely and refrigerate after opening.
Indication Age Group Dose Frequency
Omega-3 and vitamin supplementation Adults and children over 12 5ml (one teaspoon) Once daily
Children under 12 Under 12 years Not recommended without medical advice
Pregnancy All ages Not recommended

Do not exceed the recommended daily dose. If you are supporting your general health alongside this supplement, you might also find it useful to explore our vitamins and supplements collection for complementary products.

 

What Are the Possible Side Effects of Seven Seas Cod Liver Oil Max Strength?

 

Like all supplements, this product can cause side effects in some people, though not everyone experiences them. Most are mild and tend to improve once your body adjusts.

Common side effects:

  • Fishy aftertaste or fishy breath
  • Mild nausea, particularly if taken on an empty stomach
  • Loose stools or mild diarrhoea
  • Burping

Less common side effects:

  • Heartburn or indigestion
  • Skin reactions in people with fish allergies
  • Signs of vitamin A excess with prolonged high-dose use: headache, dry skin, nausea, or blurred vision — stop use and seek medical advice if these occur

If you experience any allergic reaction — such as swelling, difficulty breathing, or a rash — stop taking the supplement immediately and seek urgent medical attention. For mild digestive discomfort, taking the supplement with food usually helps. If you're also dealing with digestive issues, our IBS and cramps range may offer additional support.

 

How Should You Store Seven Seas Cod Liver Oil Max Strength?

 

  • Store below 25°C in a cool, dry place before opening
  • Keep away from direct sunlight and heat sources
  • Refrigerate after opening and use within 3 months
  • Keep the cap tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the bottle

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Seven Seas Cod Liver Oil Max Strength 150ml online in the UK?

You can order Seven Seas Cod Liver Oil Max Strength 150ml directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for just £11.99. No prescription is needed, and it can be delivered straight to your door. You'll also find a wide selection of related products in our vitamins and supplements collection.

How does cod liver oil max strength work in the body?

Cod liver oil provides EPA and DHA omega-3 fatty acids, which are incorporated into cell membranes and support cardiovascular and brain health. DHA is a structural component of the brain and retina, while EPA is associated with supporting normal heart function. The vitamin A and D content further supports immune function, vision, and bone health.

How do I take Seven Seas Cod Liver Oil Max Strength liquid step by step?

Shake the bottle well, then measure out one 5ml teaspoon using a standard medicine spoon. Take it orally with or just after a meal to minimise any fishy aftertaste. Replace the cap and refrigerate the bottle after each use.

What is the best time of day to take cod liver oil max strength?

There is no single "best" time, but taking it with your largest meal of the day tends to reduce the chance of nausea or a fishy aftertaste. Fat-soluble vitamins like A and D are also better absorbed when taken alongside dietary fat. Consistency is key — pick a time that fits your routine and stick to it.

Can I take Seven Seas Cod Liver Oil Max Strength during pregnancy?

No — this product is not recommended during pregnancy. Cod liver oil contains high levels of vitamin A (retinol), and the NHS advises that pregnant women avoid supplements containing retinol as excess amounts can harm the developing baby. Speak to your GP or midwife about pregnancy-safe omega-3 options, such as algae-based DHA supplements.

What are the side effects of Seven Seas Cod Liver Oil Max Strength?

The most commonly reported side effects are a fishy aftertaste, mild nausea, burping, and loose stools — particularly if taken on an empty stomach. These are usually mild and often improve when the supplement is taken with food. If you experience signs of an allergic reaction or symptoms of vitamin A excess such as persistent headache or dry skin, stop use and consult a pharmacist or GP.

Does Seven Seas Cod Liver Oil Max Strength interact with warfarin?

Yes, there is a known interaction. High-dose omega-3 fatty acids can enhance the anticoagulant effect of warfarin and similar blood-thinning medicines, potentially increasing the risk of bleeding. If you are taking warfarin or any other anticoagulant, speak to your GP or pharmacist before starting this supplement.

Who is eligible to take Seven Seas Cod Liver Oil Max Strength?

This supplement is suitable for most healthy adults and young people over 12 years of age. It is not suitable for pregnant women, people with fish allergies, or those already taking high-dose vitamin A or D supplements. If you have a long-term health condition or take prescription medicines, check with your pharmacist first.

What happens if I miss a dose of Seven Seas Cod Liver Oil Max Strength?

If you forget to take your daily dose, simply take it as soon as you remember — unless it is almost time for your next dose, in which case skip the missed one. Do not take a double dose to make up for a missed one. Missing an occasional dose is unlikely to have any significant effect on your health.

How long can you take Seven Seas Cod Liver Oil Max Strength for?

For most healthy adults, this supplement can be taken as part of a long-term daily routine at the recommended dose. Because it contains vitamin A — which accumulates in the body — it is important not to exceed the stated dose and to avoid combining it with other retinol-containing supplements. It is good practice to review your supplement use with a pharmacist or GP periodically.

What are the alternatives to Seven Seas Cod Liver Oil Max Strength?

Alternatives include standard-dose cod liver oil capsules, pure omega-3 fish oil supplements (which do not contain vitamin A or D), and algae-based omega-3 supplements suitable for vegans. The right choice depends on your dietary needs, health goals, and whether you are pregnant or have specific dietary restrictions. Browse our vitamins and supplements range to compare options.

Is Seven Seas Cod Liver Oil Max Strength suitable for vegetarians or vegans?

No. This product is derived from cod fish livers and is therefore not suitable for vegetarians or vegans. If you follow a plant-based diet and want to supplement omega-3 fatty acids, algae-derived DHA and EPA supplements are a suitable alternative and do not contain vitamin A from animal sources.

Can children take Seven Seas Cod Liver Oil Max Strength?

This max strength formulation is not recommended for children under 12 without medical advice, due to the higher concentrations of vitamin A and D. For younger children, there are age-appropriate cod liver oil products specifically formulated with lower doses. Always consult a pharmacist or GP before giving any supplement to a child.

What does the latest research say about omega-3 and heart health?

Research continues to support the role of EPA and DHA in maintaining normal heart function. The European Food Safety Authority (EFSA) has confirmed that DHA and EPA contribute to the normal function of the heart at a daily intake of 250mg. The NHS also recommends eating at least two portions of fish per week, including one of oily fish, to support cardiovascular health — making supplementation a practical option for those who don't meet this through diet alone.

How should I store Seven Seas Cod Liver Oil Max Strength after opening?

Once opened, store the bottle in the refrigerator and use within three months. Keep the cap tightly closed to prevent oxidation of the oil. Before opening, store below 25°C away from direct sunlight and heat. Always check the expiry date before use and keep out of reach of children.

How Should You Use Seven Seas Cod Liver Oil Max Strength?

Using this supplement correctly is simple, but a few steps will help you get the most from it and avoid any unwanted effects. Always read the label before use and follow the instructions provided with the product.

Follow these steps each time you take your daily dose:

What Is the Correct Dose of Seven Seas Cod Liver Oil Max Strength?

The recommended dose for adults and young people over 12 is one 5ml teaspoon once daily. Do not exceed this amount, as the product contains vitamin A, which can accumulate in the body if taken in excess over time.

When Is the Best Time to Use Seven Seas Cod Liver Oil Max Strength?

There is no strict requirement about timing, but most people find it easiest to take their dose with their main meal of the day — whether that's breakfast, lunch, or dinner. Taking it alongside food that contains some fat helps the body absorb the fat-soluble vitamins A and D more effectively, and it also reduces the chance of digestive discomfort or a lingering fishy taste.

The most important thing is consistency. Choose a time that fits naturally into your daily routine and try to take it at the same time each day. If you miss a dose, simply take it when you remember — but do not double up the next day.

How Long Can You Use Seven Seas Cod Liver Oil Max Strength For?

This supplement can be taken as part of a long-term daily routine for most healthy adults, provided you stick to the recommended dose. Because it contains vitamin A — a fat-soluble vitamin that the body stores rather than excretes — it is important not to combine it with other supplements that also contain retinol, such as certain multivitamins.

Once opened, use the bottle within three months and keep it refrigerated. If you have any concerns about long-term use, or if your health circumstances change, speak to your pharmacist or GP for personalised advice.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

What Are the Most Common Side Effects of Seven Seas Cod Liver Oil Max Strength?

Most people tolerate this supplement well, but some do experience mild digestive effects, particularly when first starting it or if taken on an empty stomach. These are generally not a cause for concern and often settle within a few days.

  • Fishy aftertaste or fishy breath
  • Burping with a fish-like smell
  • Mild nausea
  • Loose stools or mild diarrhoea
  • Stomach discomfort or bloating

Taking the supplement with food — ideally a meal containing some fat — is the most effective way to reduce these effects. Refrigerating the oil before use can also help minimise the aftertaste.

What Are the Less Common Side Effects of Seven Seas Cod Liver Oil Max Strength?

Less commonly, some people may experience the following. If any of these persist or concern you, stop use and speak to a pharmacist or GP.

  • Heartburn or acid reflux
  • Indigestion
  • Skin reactions in individuals with a fish allergy
  • Headache

What Are the Serious Side Effects of Seven Seas Cod Liver Oil Max Strength?

Serious side effects are rare when this supplement is used at the recommended dose. However, taking too much over a prolonged period can lead to vitamin A toxicity (hypervitaminosis A), as vitamin A is fat-soluble and accumulates in the body. Signs of excess vitamin A include persistent headache, nausea, dry or peeling skin, blurred vision, and bone pain. If you notice any of these symptoms, stop taking the supplement immediately and seek medical advice.

An allergic reaction to fish products is also possible, though uncommon. Symptoms of a serious allergic reaction include swelling of the face, lips, or throat, difficulty breathing, and a widespread rash. If you experience any of these, stop use immediately and call 999 or go to your nearest A&E.

What Should You Do If You Experience Side Effects of Seven Seas Cod Liver Oil Max Strength?

For mild side effects such as nausea or a fishy aftertaste, try taking the supplement with a meal and ensure the bottle is kept refrigerated. If digestive symptoms persist beyond a few days, reduce the dose or stop use and speak to your pharmacist. Do not take more than the recommended daily dose in an attempt to speed up any perceived benefit.

You should report any suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. Your pharmacist can also advise on whether to continue, adjust, or stop the supplement.

Can Seven Seas Cod Liver Oil Max Strength Interact With Other Medicines?

Yes. The omega-3 fatty acids in this product may enhance the effect of anticoagulant medicines such as warfarin, increasing the risk of bleeding. Vitamin A in this supplement can interact with retinoid medicines (such as isotretinoin), and vitamin D may interact with thiazide diuretics or certain heart medicines. Orlistat (a weight-loss medicine) can reduce the absorption of fat-soluble vitamins including A and D. Always tell your pharmacist or GP about all medicines and supplements you are taking before starting this product.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

We’re a safe and
regulated UK service

Registered Pharmacy Badge

Lowest Price Guarantee

We're convinced you won't find your treatment cheaper, but if you do we'll refund the difference.

Find out more

100% discreet packaging

We're convinced you won't find your treatment cheaper, but if you do we'll refund the difference.

Find out more

Agent

Need help?
Talk to our friendly experts now

How our service works

Service Setup

Service setup

Discreet Packaging

Discreet packaging

Express Delivery

Express delivery