Why do people in rich countries get cancer more often?

A biologist has raised concerns over the rising cancer rates in wealthy nations, arguing that factors beyond genetics, such as lifestyle choices, are playing a critical role. Dr. Thomas Seyfried, a researcher from Boston University, claims that high consumption of processed carbohydrates, sedentary behavior, chronic stress, and poor sleep patterns contribute significantly to the increased prevalence of cancer among populations in developed countries like the United States and Australia. His findings challenge conventional wisdom that attributes the disease primarily to genetic predispositions. According to Seyfried, individuals living in affluent societies consume excessive amounts of highly refined carbohydrates, which he believes damage cellular structures known as mitochondria. These organelles are responsible for generating energy within cells, and their chronic impairment, according to Seyfried, can trigger the development of cancer. He contrasts this with countries such as Nigeria and Nepal, where medical professionals report significantly lower rates of the disease. Seyfried argues that these differences cannot be explained solely through genetic factors, suggesting instead that environmental and behavioral influences play a crucial role. The biologist draws parallels between human evolution and traditional lifestyles observed in African communities. He references observations made by physician Albert Schweitzer, who noted that communities in Africa, which followed traditional ways of life and consumed minimally processed food, had exceptionally low rates of cancer. Seyfried explains that the human body evolved under conditions where food was scarce, giving humans an evolutionary advantage in efficiently storing energy. However, in today's world, where calorie-dense foods are readily available, this biological adaptation leads to health complications. To illustrate his point, Seyfried compares domesticated dogs with wild wolves. Cancer often proves fatal for household pets, whereas wild wolves rarely suffer from the disease. He attributes this difference to the wolves' diet and higher levels of physical activity. Based on this comparison, Seyfried advises people to eliminate processed carbohydrates from their diets, increase physical activity, reduce stress, and ensure quality sleep to mitigate cancer risk. Despite the compelling nature of Seyfried’s arguments, they have not gained widespread acceptance within mainstream oncology. Major healthcare institutions continue to classify cancer primarily as a genetic disorder resulting from mutations in cells. However, many experts acknowledge the value of Seyfried’s recommendations regarding healthy lifestyle choices. They agree that reducing intake of processed foods, increasing exercise, and managing stress benefit all individuals. Nevertheless, patients undergoing treatment must always follow guidance from their physicians. Seyfried’s research highlights a growing debate within the scientific community about the interplay between environment, lifestyle, and genetics in the development of diseases such as cancer. While some researchers remain skeptical of his theories, others see potential in exploring how changes in daily habits might influence cancer incidence. The discussion underscores the need for further studies to determine whether lifestyle modifications could serve as effective preventive measures against the disease. Researchers are currently examining data from various regions to assess whether similar trends exist globally.