**7. Conclusion**

Changes in the FA profile of meat and milk resulting from EO addition have been shown to be variable and unpredictable in terms of n-3 fatty acids. Furthermore, to

*Essential Oils in Animal Diets to Improve the Fatty Acids Composition of Meat and Milk… DOI: http://dx.doi.org/10.5772/intechopen.114045*

enhance our understanding in this area, it seems important to precisely characterize the effects of various environmental elements on the major rumen microbial species involved in the biohydrogenation process and to study how these effects are influenced by diet and ruminal environment. Further studies are needed on the factors that influence the biohydrogenation bacteria in the rumen so that we can propose new rational dietary modifications that will ultimately lead to healthier ruminant products for human consumption.
