University > Nutrients > ALA (Alpha-linolenic Acid)
Illustration of a golden drop of oil labeled 'ALA,' representing alpha-linolenic acid, an omega-3 fatty acid.

ALA (Alpha-linolenic Acid)

ALA (Alpha-linolenic Acid) is a plant-based omega-3 fatty acid and a precursor to EPA and DHA, the more bioactive long-chain omega-3s. Although ALA can be converted into EPA and DHA, the process is inefficient in dogs, making direct sources of EPA and DHA more beneficial.
Last Reviewed Date: 01/13/2026

Overview

Understanding Alpha-Linolenic Acid (ALA) for Dogs

Alpha-Linolenic Acid (ALA) is a short-chain omega-3 fatty acid found in plant-based sources like flaxseed, chia seeds, and hemp. While ALA can technically be converted into the long-chain omega-3s EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), this conversion process is extremely inefficient in dogs. Unlike humans or some herbivores, which convert ALA more effectively, dogs lack the metabolic capacity to transform ALA into significant amounts of EPA and DHA. This makes marine-sourced omega-3s, like fish oil, a much better option for meeting a dog’s omega-3 needs.

The Link Between ALA, EPA, and DHA

ALA serves as a precursor to EPA and DHA, meaning the body must convert it into these usable forms to provide their anti-inflammatory, cognitive, and cardiovascular benefits. However, dogs convert less than 10% of dietary ALA into EPA, and an even smaller fraction into DHA. Most ALA remains unused, offering limited health benefits on its own.

Key Points About ALA:
  • Plant-Based Option: ALA can be used in plant-based diets where marine-derived EPA and DHA are unavailable, though it should not be relied upon as the sole omega-3 source.
  • Minor Health Benefits: ALA may provide some antioxidant properties and support skin and coat health, but these effects are far less pronounced compared to EPA and DHA.
  • Supplementary Role: ALA-rich seeds or oils, like flaxseed or chia, can complement a diet, but they should ideally be paired with direct sources of EPA and DHA, such as fish oil or algae oil.
    • While flaxseed and chia can provide other beneficial nutrients such as soluble fiber, they should not be used primarily for their Omega-3 content.

Why Marine Sources Are Superior Omega-3 Sources for Dogs

Marine-derived EPA and DHA are already in their bioavailable forms, meaning dogs can directly utilize them without needing to convert from ALA. Fish oil, algae oil, and other marine-based supplements bypass the inefficient conversion process entirely, delivering immediate benefits to support inflammation, cognitive health, and cardiovascular function.

Dogs and ALA Conversion Rates:

Foods

Info Food sources of ALA (Alpha-linolenic Acid)
Image & Title At a Glance
Flaxseed Flaxseed Flaxseed is a plant-based source of omega-3 fatty acids, primarily ALA, which dogs convert inefficiently, but its combination of soluble and insoluble fiber can make it a beneficial ingredient for supporting digestive health in dogs.

Food Components

Info Ingredient sources of ALA (Alpha-linolenic Acid)
Image & Title At a Glance
Flaxseed OilFlaxseed Oil Flaxseed oil is a plant-based oil rich in omega-3 fatty acids, particularly ALA.

Health Conditions

Info Health conditions related to ALA (Alpha-linolenic Acid)

Follow the Research

Info Studies providing deeper insight into ALA (Alpha-linolenic Acid)
Title Information
An overview of fatty acids in companion animal medicine

At a Glance

This peer-reviewed veterinary review, published in JAVMA (2015), highlights the role of omega-6 and omega-3 fatty acids in dogs and cats. It explains that linoleic acid (LA) and α-linolenic acid (ALA) are essential in the canine diet, DHA is conditionally essential for puppies, and dogs convert less than 10% of ALA into EPA and DHA—making direct dietary sources like fish or algae oils an important part of canine nutrition.

Connecting the Dots
  • Alpha-Linolenic acid is an essential plant-derived omega-3 fatty acid and the dietary precursor to EPA and DHA.

  • According to the review, dogs convert less than 10% of ALA into these long-chain omega-3s, so preformed sources are often required to meet nutritional or clinical targets.

  • Potential Adverse Effects of Omega-3 Fatty Acids in Dogs and Cats

    At a Glance

    This 2013 review looks at the possible risks of omega-3 fatty acids in dogs and cats, especially EPA and DHA from fish oil. While omega-3s are commonly used to support skin, joint, heart, and kidney health, the authors explain that high amounts can sometimes cause issues like GI upset, changes in clotting, oxidative stress, immune shifts, or slower wound healing. The paper also stresses that plant-based ALA is not the same as EPA and DHA, so the source of omega-3s matters when considering both benefits and risks.

    Connecting the Dots
  • The authors explain that ALA requires multiple desaturation and elongation steps to become EPA or DHA, and mammals perform this conversion inefficiently.
  • The review states that ALA has some dermatologic benefits, but its physiological actions differ from those of long-chain omega-3s.
  • The authors note that diets high in ALA do not meaningfully change arachidonic-acid–derived inflammatory pathways because so little ALA becomes EPA or DHA.
  • The paper emphasizes that total omega-3 labels are misleading when they rely mostly on ALA, since ALA does not replicate EPA/DHA’s therapeutic effects.
  • The review highlights that ALA cannot produce the same eicosanoid profiles as EPA or DHA, limiting its impact on immune modulation.
  • Therapeutic Effect of EPA and DHA Supplementation in Neoplastic and Non-Neoplastic Companion Animal Diseases

    At a Glance

    This systematic review evaluates the therapeutic effects of EPA and DHA in treating various diseases in dogs and cats. Twenty-three randomized studies were analyzed, with benefits seen in both neoplastic (cancer-related) and non-neoplastic conditions such as allergic dermatitis, osteoarthritis, cardiovascular diseases, and haircoat disorders. The anti-inflammatory and immunomodulatory properties of EPA and DHA, through suppression of pro-inflammatory cytokines and matrix metalloproteinases, are highlighted as key mechanisms for their therapeutic effects.

    Connecting the Dots
  • ALA is a precursor to EPA and DHA, but the study indicates that its conversion is inefficient in dogs, making direct supplementation of EPA and DHA more effective for managing inflammation and related conditions.
  • Blog Articles

    Info Articles related to ALA (Alpha-linolenic Acid)
    Featured Image Link Blog Title Blog_URL_Link
    Running-Dog-Image.png Busting Common Myths About Omega-3 Supplements for Dogs https://www.bernies.com/blogs/bernies-blog/busting-common-myths-about-omega-3-supplements-for-dogs/
    photo-dog-scratching-itch-735x438-1.png Omega-3s for Dogs with Allergies: Relief from Itching and Inflammation https://www.bernies.com/blogs/bernies-blog/omega-3s-for-dogs-with-allergies-relief-from-itching-and-inflammation/

    Dig Deeper

    Info Q/A's related to ALA (Alpha-linolenic Acid)
    Title URL At a Glance
    What’s the difference between EPA, DHA, and ALA? https://www.bernies.com/university/dig-deeper/whats-the-difference-between-the-three-main-omega-3s-epa-dha-and-ala/ EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) come from fish or algae and are directly absorbed by dogs to support inflammation, cognition, and cellular health. ALA (alpha-linolenic acid), from seeds like flax or chia, is a plant-based omega-3 that dogs can convert into EPA or DHA, but not very efficiently. The main difference is that EPA and DHA are already in the form dogs need, while ALA plays a more limited role unless paired with other sources.