Selenium – SmartSel

Rumen-protected selenium supplement for cows

Selenium is one of those minerals you don’t notice until it’s missing. When selenium levels are low, cows can struggle to hold condition and cope through the higher-pressure parts of the season, especially around calving. SmartSel is a lipid-coated selenium supplement for cows, designed to get past the rumen and release where it can be absorbed, so you get more consistent selenium intake.

What this means for farmers

• Fewer “why are they not bouncing back” moments after calving
• Better support for immunity and reproduction
• Better value from the selenium line in your mineral spend

Talk to your local Agvance Consultant

Why should farmers care about selenium?

What does selenium do?

Selenium helps support:

• Immune function
• Fertility and cycling
• Calving recovery
• Calf health and vigour

What can low selenium look like on-farm?

Low selenium can show up as:

• More animal health issues, cows are not coping as well under pressure
• More post-calving recovery problems, like retained membranes
• Poorer performance and production, especially when other stressors are in play
• Weak calves or white muscle disease in young stock when deficiency is severe

If you’re seeing any of this, testing is the fastest way to confirm whether selenium is part of the story.

Why Selenium – SmartSel?

Standard sodium selenite can be tied up in the rumen and pass through. Selenium – SmartSel’s lipid coating is designed to reduce those rumen losses, so more selenium stays available for absorption later in the gut.

What’s inside?

Selenium (sodium selenite): A widely used selenium source in ruminant diets.

Lipid coating (microencapsulation): A protective layer designed to help selenium get through the rumen and release where it can be absorbed.

SmartSel is ideal to use when:

• Herd blood or milk testing shows selenium is low, or not lifting
• You want more certainty from the selenium part of the mineral plan
• You’re heading into calving, early lactation, mating, or other high-demand periods
• You need a selenium source that fits well in mineral mixes for your feeding system

Talk to your local Agvance Consultant

How to use

SmartSel is used as part of an Agvance mineral programme. Your Agvance Consultant will help set the right inclusion rate based on:

• Your herd’s selenium status
• Your feeding system
• Other trace elements in the diet
• Total selenium coming from all sources

Selenium can run low on some farms and high on others, depending on location and history. A quick herd test through your vet gives you a clear starting point. We can then set a plan that suits your farm.

Call 0800 BALANCE, contact your local Agvance consultant, or log in to your Agvance account to order online.