A natural yellow colorant based on luteine. This dietary supplement intensifies the yellow colour of the plumage and increases the resistance. As feathers consist of dead cells and are consequently not fed by the metabolism, they absorb the colour when they are formed. On average, the plumage is changed once a year. However not in one go. The moulting of the old feathers is stimulated by the formation of new ones and this is a gradual process so that the bird keeps a full plumage. When Yel-Lux is added to the food it is transported to the place where the feather is growing and it takes on the more intense yellow colour. The feather formed retains its colour until the formation of a new feather.
Yel-Lux is not water-soluble and must therefore be mixed in the food.