Take the Broono Longevity Assessment →

Selenomethionine

Selenium for Dogs

Supports antioxidant protection and healthy immune function in dogs

Antioxidant defence
Essential
Piece of black vitreous selenium with glassy conchoidal fracture faces

Selenium for dogs: powering one specific antioxidant enzyme

Selenium's role is narrower than most antioxidant nutrients: it's a direct component of glutathione peroxidase, one specific enzyme, which is why Essential pairs it with a broader set of antioxidant ingredients rather than relying on it alone.

A narrow but essential role

Selenium is a key component of antioxidant enzymes such as glutathione peroxidase, contributing to protecting cells from oxidative stress and supporting normal immune responses. A study in weaned Beagle puppies found dietary selenium supplementation improved both antioxidant activity and immune function at the amount tested.

Selenium has a narrower safety margin than many minerals, meaning the gap between a useful amount and an excessive one is smaller. That's why Essential includes it at a small, measured amount per serving rather than leaving total intake to guesswork.

Find Selenium in

Questions

Selenium FAQ

EVERY DOG AGES DIFFERENTLY.

Take the longevity assessment to find where your dog stands and which formula fits your dog. Takes 2 minutes.

Start →
Biological reserve across a dog's life phases, with this dog's score plotted against the baselineAssessment result panel scoring weight, joint health, nervous system, gut health and overall vitality

From the journal

Related reading

A puppy and a fully grown adult dog sitting side by side, both alert
  • essential
  • folic-acid
  • magnesium

Vitamin needs by life stage: puppies vs. adult dogs

Do puppies need different vitamins to adult dogs? What actually changes with growth, and where daily supplementation fits from six months old.

10 August 2026
A dog in mid-stride across a sunlit field, full extension suggesting vitality
  • essential
  • selenium
  • taurine

Taurine for dogs: what it does, and why it made headlines

What taurine actually does for a dog's heart, why grain-free diets brought it into the news, and which dogs should have it checked.

7 August 2026
A dog sitting alert in a sunlit spot by a window, coat catching soft directional light
  • essential
  • selenium
  • taurine

Subtle signs of low vitality in dogs: dull coat and low energy

A dull coat and slightly lower energy are easy to write off as normal ageing. Here's what's usually behind them and when they're worth acting on.

26 July 2026