Selenium is an essential nutrient at 0.1 parts per million for almost all livestock species. Many studies have indicated the rate of growth and health of animals and poultry is improved when selenium is added to feeds at 0.3 parts per million. However, selenium can be toxic at high levels, with an LD50 (lethal dose for 50% of test animals) of about 7 parts per million (7 grams per metric tonne). Microtracers manufactures a number of selenium products, using sand and iron as carriers instead of coarse limestone. Our selenium products are also treated with hydrogenated soybean oil to reduce dustiness.
- Dispersion – Microtracers selenium products disperse well in feed premixes and final feeds
- Less dusty – 90% less dusty than limestone based selenium sources, a worker safety issue
- Flows well – Products are presifted so they flow well in materials handling equipment, a major problem as as selenium compounds are hygroscopic and may accumulate in premix conveying equipment and may then release into premixes at toxic levels