Lignans for Dogs: Benefits and How They Support Health

Lignans are a group of naturally occurring plant compounds that have attracted growing interest in veterinary nutrition — particularly for dogs with hormonal imbalances and certain health conditions. Here's a straightforward guide to what lignans are and how they may benefit your dog.

What Are Lignans?

Lignans are phytoestrogens — plant-derived compounds that can interact with oestrogen receptors in the body. They are found naturally in seeds, grains, and certain plants. The two most studied forms for dogs are:

• HMR Lignans — derived from the Norwegian spruce tree (Picea abies), HMR (7-hydroxymatairesinol) is one of the most bioavailable and potent lignan forms available
• SDG Lignans (Flaxseed Lignans) — derived from flaxseed, these are a more widely available and cost-effective option

Why Are Lignans Used in Dogs?

The most established use of lignans in dogs is as part of a natural management protocol for Cushing's disease (hyperadrenocorticism) — a condition where the adrenal glands produce excess cortisol. Lignans are often used alongside melatonin in this context, based on research from the University of Tennessee College of Veterinary Medicine.

Beyond Cushing's, lignans may also support:

• Hormonal balance — particularly in intact or older female dogs
• Antioxidant activity — lignans have demonstrated free-radical scavenging properties
• General immune support — as part of a broader wellness supplement routine

HMR vs. Flaxseed Lignans: Which Is Better?

Both have merit, but they differ in potency and bioavailability. HMR lignans are more concentrated and require a smaller dose to achieve the same effect. Flaxseed lignans (SDG) are gentler and often used for general wellness support rather than targeted therapeutic use.

K9 Select offers both options:

• HMR Lignans for Dogs 20mg — peanut butter flavoured, 90 tablets
• Flaxseed Lignans (SDG) for Dogs 20mg — peanut butter flavoured, 90 tablets
• Multi-Formula with HMR Lignans and Melatonin — combining both active ingredients in one convenient tablet

How to Use Lignans

Lignans are typically given daily with food. If your dog has been diagnosed with Cushing's disease or another hormonal condition, work closely with your vet to determine the appropriate dose and whether lignans are suitable alongside any prescribed medication.

This article is for informational purposes only and does not constitute veterinary advice. Always consult a qualified veterinarian before starting your dog on any supplement.