The problem, IMHO, is that dietary science makes recommendations based on gross over-simplifications.  Creating guidelines based on such overly simplistic grouping of information leads to sub-optimal results because it glosses over important nuances.<p>The saturated v. unsaturated distinction is one that we are finally realizing is not an important to overall health.  However, this has been replaced by another is the trans fat v. cis fat distinction.<p>The government is pushing for the removal of trans fats from foods without consideration to the fact that vaccenic acid is a trans fat that is extremely good for mammals (it&#x27;s found in high quantities in breast milk, for instance) while elaidic acid is what has been linked to low HDL and heart disease.<p>Of course, the population as a whole is no better.  They also cherry-pick things they want to be healthy with little consideration of the science behind it.  So I&#x27;m not sure this is an issue that needs addressing.