Horses are missing a nutrient used by every cell in the body

That nutrient is omega-3 — specifically EPA and DHA, the forms the body actually uses.

Brown horse standing on a dirt path with greenery in the background

Synaxis Core supplies algae-derived EPA and DHA directly to horses through a structured 90-day protocol designed to address a common nutritional constraint in modern equine diets.

Horses get omega-3 from fresh grass, which most horses are lacking for at least part of the year. The form of omega-3 in grass also has to be converted into a useable form, and that conversion process is limited.

When omega-3 intake is not effective, the effects tend to show up across multiple systems rather than in isolation.

Coat

Skin and coat turn over quickly, reflecting changes in fatty acid status earlier than most other tissues in the body

Joints

EPA and DHA are present in joint fluid and surrounding tissue, where signalling is associated with loading and movement

Recovery

Membrane composition influences how the body manages inflammatory load after repeated work

Breathing

Respiratory tissue is the subject of the clinical research on which the Synaxis Core dose is based

DHA and EPA are incorporated into cell membranes throughout the body. Once incorporated, they influence how tissues respond to stress — particularly in inflammatory signalling.

Why feeding linseed often doesn’t change anything

Linseed, flaxseed, and also chia seeds provide ALA, a form of omega-3. Before ALA can be used, it must be converted by the body into DHA and EPA. That conversion is limited - it does not reliably produce DHA and EPA in horses, regardless of how much ALA is fed.

Feeding linseed doesn't always solve the problem. If the body can't convert ALA into EPA and DHA reliably, the downstream effects — in joints, respiratory tissue, skin and recovery — are unlikely to change regardless of how much you feed.

Who this is for

Most owners who come to Synaxis Core have been feeding their horse carefully, for instance, linseed, a supplement, or a combination — and want to know it’s actually making a difference.

It is particularly relevant for:

Hay-based or restricted turnout

Where baseline omega-3 intake from forage is already low

Horses in consistent work

Where recovery and inflammatory balance matter

Respiratory or skin concerns

Where additional nutritional support may be relevant

Diet unlikely to meet needs

Which describes most horses in the UK for at least part of the year

If your horse relies heavily on hay or has restricted turnout during winter, their omega-3 status is likely lower than you think. And as conditions change through spring — more turnout, more work, more environmental load — the case for ensuring adequate EPA and DHA becomes stronger, not weaker.

The Omega-3 Check establishes whether this applies to your horse in around 90 seconds.

The Omega-3 Check

Is what you're feeding actually making a difference?

Survey question about horse care needs on a white background

A short assessment that identifies whether your horse’s current diet is likely to be supplying enough omega-3, a nutrient that influences coat, recovery, joints and respiratory health, and if not, where the gap sits.

7-8 questions, taking around 90 seconds. A personalised result based on your horse’s diet and the areas you want to improve.

Omega-3 check

The Synaxis Core 90 Day Protocol

A defined 90 day intervention delivering EPA and DHA directly, at a dose calibrated to published veterinary research.

Synaxis Core 90 Day Protocol

The 90-day protocol is structured to do two things: create the conditions for a response, and give you a way to know whether one occurred.

View the ProtocolOrder now
  • Formulation informed by published veterinary research
  • Algae-derived EPA and DHA — no conversion required
  • Five ingredients, nothing undisclosed
  • UK registered company — Synaxis Ltd, No. 17137114