Dairy

Humans stop producing the necessary enzyme to digest lactose (the main sugar in milk) after breast feeding age; most people are at least mildly lactose intolerant.  Consuming dairy, therefore, often leads to congestion, indigestion, bloating, skin breakouts and unideal bowel movement patterns.

Cow milk is also filled with growth hormones because it is meant for growing calves. These hormones can disrupt our human hormones which are very sensitive and largely dictate our physical and mental health.

 

Adult cows do not drink their milk.  Why do we?

Oils (refined)

The refining process- used to extract oil from sources such as rapeseeds (i.e. Canola oil), sunflower seeds, safflower seeds, soybeans, corn and peanuts- involves the application of high heat and chemical solvents, both of which produce oxidants (the opposite of antioxidants, i.e., what causes inflammation and disease).

Refined oils are also too high in Omega-6 fatty acids.  By over-consuming Omega-6 fatty acids (which we do because they are in almost all shelf-stable food products), we throw off our ratio of Omega-3 to Omega-6 fatty acids, which has been directly linked to illness.

Gluten

The flour and bread we consume today is not the same as that of 100 years ago.  Highly processed and void of essential bacteria to help us digest it, the protein gluten that is in today's flour and bread irritates our gut lining and prevents us from absorbing the nutrients from our food.

Most gluten-containing foods are relatively low in fiber, too- which is needed to help digestion.

Sugar (added)

Sugar is not meant to be consumed the way we consume it today: isolated from its natural source (which contains complementary nutrients like fiber), refined and in large quantities.  

Refined, added sugars are addictive, cause our blood sugar to spike, negatively impact our hormones and mood and cause weight gain and inflammation.

The increasing rate of sugar consumption in the US can be directly linked to all of the most prevalent chronic diseases.

Most healthy foods contain their own natural sugars- so we never need to worry about being deficient in this energy source.

References

Hormones in Dairy Foods and Their Impact on Public Health.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4524299/

The importance of the ratio of omega-6/omega-3 essential fatty acids.

https://www.ncbi.nlm.nih.gov/pubmed/12442909

Wheat gluten intake increases the severity of experimental colitis and bacterial translocation by weakening of the proteins of the junctional complex.

https://www.ncbi.nlm.nih.gov/pubmed/30554574

Sugar Addiction: From Evolution to Revolution

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6234835/

NIH study finds heavily processed foods cause overeating and weight gain

https://www.nih.gov/news-events/news-releases/nih-study-finds-heavily-processed-foods-cause-overeating-weight-gain