The use of urea as a protein replacement is attractive in ruminant diets because of its low cost compared
with other protein feeds such as SBM with high rumen degradability. Moreover, slow release urea products
resulted in more efficiency than urea on rumen fermentation, microbial protein synthesis, and milk yield in
ruminants. Based on this review it could be concluded that slow release urea products can be effective product
for ruminants and should be applied further in practical ruminant feeding in the tropics.