A 2020 book by Colin Campbell. Omitting material that overlaps with his earlier books, I have summarized only Part II, which critiques myths within nutrition.

Chapter 5. The Cult of Animal Protein

Chapter 5 examines the origins of the protein myth. It covers the discovery of protein around 1839, the related history of nutrition, the birth of the animal protein myth, and problems with distinguishing complete from incomplete proteins.

Chapter 6. Related Myths, Debates, and Diversions

Dietary cholesterol

Many mistakenly believe that the cholesterol we eat (dietary cholesterol) is directly linked to blood cholesterol. They therefore believe dietary cholesterol is the most important cause of heart disease. This myth has persisted for a century. But numerous studies have shown that animal protein, rather than dietary cholesterol, is the problem. Renowned heart disease expert Ancel Keys said, “It is now clear that dietary cholesterol itself … has almost no effect on blood cholesterol concentrations.” Plant protein, on the other hand, does not raise blood cholesterol.

Saturated fat

Studies associating saturated fat intake with high blood cholesterol and heart disease led to the prejudice that saturated fat is “bad fat.” Meanwhile, unsaturated fat is believed to be “good fat” because it lowers blood cholesterol. But this is an oversimplification.

The author argues that the association between saturated fat and heart disease is merely due to animal protein. Evidence:

A cohort study of 90,000 women (Nurses’ Health Study]) found that reducing dietary fat intake did not lower breast cancer risk.
From a biochemical perspective, saturated fat is relatively inert and unlikely to cause disease.
A 2014 study found no scientific evidence that saturated fat causes cancer or heart disease.
There is no consistent evidence that reducing saturated fat intake lowers mortality from cardiovascular disease or other causes. (2018, Saturated fat - part of a healthy diet)
The difference in blood cholesterol reduction between a low-fat diet and a low-fat + soy protein diet was minimal. In other words, reducing animal protein matters more.

Trans fat, omega-3, omega-6

(Omitted)