Never has there been a more polarizing topic. Most likely due to the fact that there is a lot of money to be made selling addictive foods and diet programs that only work momentarily. Driven by big businesses that take advantage of the public’s insecurities and then use artificial support of social movements as a shield. 

Corporate greed aside, here is a list of some of the reasons why we can’t seem to agree on the “perfect” human diet:

• Humans ate seasonally, so we developed metabolic flexibility to adapt to weather changes and resource limitations.
• Global-wide migration and genetic adaptation to resource limitations has resulted in nutritional variability.
• Mass scale agriculture and selective breeding has made our food unrecognizable. 
• Nutritional guidelines are often ill advised and unchallenged. 
• Nutritional research limitations and overdependence on WEIRD (Western, educated, industrialized, rich, and democratic) participants.
• We have an unspoken emotional connection with food that often blinds us to conflicting results.