Purified feed is composed of highly purified raw materials, one of which provides a nutrient. Due to the stable nutrient composition and raw material source, the purified feed is a suitable choice for the induction of lab animal disease model.
Compared with the purified feed, the cereal feed is mainly composed of grains. In the field of laboratory animal nutrition science, cereal feed will appear in the journal literature with different names, such as roughages, grain-based feeds.
The composition of each raw material of cereal feed is very complex, there are more than one nutrient, and it is often difficult to separate, which makes it very difficult to modify the formula. Especially in the research for the purpose of nutrient deficiency, cereal feed is not suitable at all.
There will also be residual non nutrients and harmful substances in cereal feed, such as heavy metals and phytoestrogens. In addition, it is very difficult to modify the formula of the cereal feed, resulting in the non nutrient residues can not be separated from the feed.