Effects of various selenium sources in layers

The effects of various sources of selenium were tested on their effect on egg freshness and apparent bioavailability of selenium. This was done by measuring selenium levels in the muscle and the different components of the egg (whole egg, albumen, yolk). In a study, performed by Lallemand Animal Nutrition, 96 ISA Brown laying hens were divided into four groups each receiving the same feed supplemented with 0.2 ppm of selenium in the form of sodium selenite (SS), selenized yeast* or two forms o