Rethinking Omega-3 Fatty Acids

By Dr Nicole Rous

When we think about supporting our pets’ health through nutrition, omega-3 fatty acids are often part of the conversation.

They are widely discussed in relation to overall wellbeing, but understanding how they work involves more than simply adding an omega-3 supplement to a pet’s diet.

The type of fatty acids, their source, the quality of the formulation, and the individual animal’s needs can all influence how supplementation is approached.

As veterinary care continues to evolve, there is growing interest in understanding nutritional needs more precisely. Rather than taking a one-size-fits-all approach, this means considering how different nutrients interact, what the body may need, and how we can make more informed decisions about long-term health.

In this episode of the Pure Animal Podcast, Dr Sarah Howard discusses omega-3 fatty acids with Shy Tiger ambassador Dr Nicole Rous, exploring why it may be time to rethink how we understand, measure, and use these important dietary fats.

Why are we rethinking omega-3 fatty acids?

Omega-3 fatty acids are often grouped together, but they are not all the same.

Two of the most widely discussed omega-3 fatty acids are EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). Understanding their individual roles, alongside the way they are sourced and formulated, is an important part of evaluating omega-3 supplementation.

This raises a broader question: are we looking closely enough at what a supplement actually provides?

Different formulations may contain different fatty acids, concentrations, and combinations of ingredients. The source of the fatty acids also matters when considering how they contribute to an animal’s overall intake.

Rather than focusing only on whether a product contains omega-3s, it is worth considering its composition, quality, and suitability for the individual pet.

Understanding the relationship between omega-3 and omega-6

Omega-3 and omega-6 fatty acids are both important components of the diet. However, their relationship is often simplified, particularly when omega-6 is described as inherently pro-inflammatory.

The reality is more nuanced.

Both groups of fatty acids contribute to normal physiological processes, including pathways involved in inflammation. Their effects depend on the specific fatty acids involved, how they are metabolised, and the broader nutritional context.

This is why looking at one fatty acid in isolation may not provide a complete picture.

The balance between omega-3 and omega-6 intake is one consideration, but the overall composition of the diet matters too. Understanding how these fatty acids interact can help us move beyond broad assumptions and towards more informed nutritional decisions.

Why the source and formulation matter

Not all dietary sources of omega-3 fatty acids provide the same combination of fatty acids.

For example, some sources provide EPA and DHA directly, while others contain precursor fatty acids that the body must convert into these forms. The extent of this conversion can vary, making the source and formulation important considerations when evaluating a supplement.

The presence of omega-6 fatty acids in a formulation may also influence the overall fatty acid profile being supplied.

This is particularly relevant when comparing products that may appear similar at first glance but differ in their ingredients, fatty acid concentrations, and EPA-to-DHA ratios.

Understanding these differences helps explain why choosing an omega-3 supplement should involve more than looking at the total amount listed on the label.

How do we know whether a pet needs more omega-3?

One of the important questions in nutritional care is how to assess an individual animal’s needs rather than relying on general recommendations alone.

Dietary intake can provide useful information, but it does not necessarily tell us the full story of an animal’s fatty acid status.

This is where measuring omega-3 levels becomes an interesting area of discussion.

The omega-3 index is a measurement based on the proportion of EPA and DHA in red blood cell membranes. Red blood cell fatty acid analysis can provide information about the fatty acids incorporated into these cells, offering a different perspective from simply estimating dietary intake.

However, interpreting these measurements in veterinary care requires care. Reference ranges, clinical applications, and the relationship between measured levels and health outcomes need to be considered in the context of the individual animal and the available evidence.

These measurements may help inform a more personalised approach, but they should not be interpreted in isolation or treated as a diagnosis.

Establishing a baseline and monitoring changes

Personalised nutritional care involves understanding where an animal starts and assessing whether an intervention is appropriate over time.

Establishing a baseline can provide a point of reference when considering omega-3 supplementation. Where fatty acid testing is available and appropriate, repeat measurements may also help assess changes following a dietary adjustment or supplementation.

However, the timing of follow-up testing matters. Monitoring too frequently may not provide meaningful additional information, while the appropriate interval can depend on the individual animal and the reason for supplementation.

The aim is not simply to increase omega-3 levels, but to understand what is appropriate for that pet and whether the chosen approach is achieving its intended purpose.

This is also where the distinction between proactive and reactive strategies becomes important. Some supplementation decisions may be made as part of broader nutritional support, while others may be guided by a specific therapeutic goal. The intended outcome should help inform the formulation, EPA-to-DHA ratio, and monitoring approach.

What can human research tell us about pet health?

Human medicine has contributed significantly to our understanding of fatty acids, their metabolism, and their potential applications in health.

However, findings from human research cannot automatically be applied to dogs and cats.

Different species may have different nutritional requirements, metabolic processes, and responses to supplementation. The evidence supporting a particular application in humans may therefore not provide the same level of certainty for companion animals.

This does not mean human research is irrelevant to veterinary medicine. Instead, it provides a foundation for further investigation, helping identify questions that can be explored through veterinary research and clinical practice.

A thoughtful approach recognises both the value of existing research and the limitations of applying it across species.

What do we still need to understand about omega-3s?

Although omega-3 fatty acids have received considerable attention, important questions remain about how best to use them in veterinary care.

These include how to interpret fatty acid measurements in individual animals, what levels may be appropriate for different clinical goals, how different formulations influence outcomes, and when monitoring can meaningfully guide decisions.

Further research is also needed to clarify how fatty acid ratios, dietary sources, and individual differences influence responses to supplementation.

As our understanding develops, the goal should be to translate new evidence into practical decisions without overstating what we know.

A more personalised approach to nutritional care

Supporting a pet’s health involves looking at the bigger picture.

Diet, lifestyle, health history, and individual needs all contribute to nutritional decisions. Omega-3 supplementation is one part of that picture, and its suitability will depend on the animal and the purpose for which it is being considered.

For pet owners, this means discussing nutritional concerns and supplement choices with a veterinarian who can help assess the available evidence and determine what may be appropriate.

For veterinary professionals, it highlights the importance of continuing to evaluate nutritional recommendations as research and testing methods evolve.

Rethinking omega-3 fatty acids is not about assuming that every pet needs supplementation or that one formulation will suit every animal. It is about asking better questions, understanding the differences between products, and making decisions with greater consideration for the individual.

Final thoughts

Omega-3 fatty acids are an important part of the conversation around nutrition and pet wellbeing, but their role is more complex than a single ingredient or ratio can explain.

By looking more closely at fatty acid composition, dietary sources, formulation, individual status, and therapeutic goals, we can begin to approach supplementation more thoughtfully.

In this episode of the Pure Animal Podcast, Dr Sarah Howard and Dr Nicole Rous explore these questions and discuss how a more informed understanding of omega-3 fatty acids may help shape the future of veterinary nutritional care.

Stay tuned and listen to the full conversation on the Pure Animal Podcast to learn more about omega-3 fatty acids, their role in pet health, and how they can be approached more thoughtfully in veterinary care.

Listen to the full conversation here:
https://omny.fm/shows/pure-animal-podcast/rethinking-omega-3-fatty-acids-with-dr-nicole-rous?in_playlist=podcast

This episode was brought to you by PAW, Pure Animal Wellbeing.  Developed by vets, inspired by nature, and dedicated to supporting lifelong health in pets.