Why?

Why do we do so many diet studies on mice when they appear to be so biologically different to humans in this study?

http://www.ncbi.nlm.nih.gov/pubmed/22838969/


and...

Why don't more ketogenic diet studies acknowledge the importance of omega 3 fatty acids like this one?

http://www.ncbi.nlm.nih.gov/pubmed/18447912/