Iron, Copper, and Zinc

Thinking about supplementing iron, copper, or zinc? Your first question should be: What does the science say?

The Science

Many owners are encouraged to fortify their horse’s diets with additional zinc and copper. Most often, this is an attempt to decrease iron absorption. How you might ask? This is because the initial metal transporter at the lumen side of the digestive tract transports iron, copper and zinc (and some other metals) – and if zinc and copper are higher, perhaps they will compete for binding sites. In short, the goal is to prevent some metals from binding in a horse’s digestive system.

Additionally, if you look at the studies where zinc and copper are supplemented to equine diets, they are poorly absorbed, come out in the feces, and can contribute to groundwater contamination.

The Lesson

Great care should be taken when adding zinc and copper to equine diets, especially with the poorly sustained intent to affect iron metabolism. As a nutrition advisor, I strongly discourage owners from adding iron, copper, or zinc by themselves. A horse is very effective at regulating their own iron levels and deficiencies or overloads are quite rare.

If you have questions or want to discuss your horse’s specific needs, reach out today. I’d be happy to help guide you through the science and make sure your horse is receiving the nutrition they need to stay happy and healthy.

Looking for more information? Check out this great article!