American famous nutrition expert: milk cancer theory is misleading
Academician of the Chinese Academy of Engineering and a renowned American nutrition expert were recently interviewed in an exclusive session. The discussion focused on one of the most debated topics in nutrition: the role of milk in human health, especially for children.
Milk has long been considered essential for children’s growth and development. It is rich in calcium, protein, and other vital nutrients that support bone health and overall well-being. That’s why initiatives like “a glass of milk per person per day†have been strongly promoted. However, recent reports claiming that milk may cause cancer have sparked public concern. These claims often cite research by T. Colin Campbell, a professor at Cornell University, who suggested that milk could contribute to chronic diseases such as heart disease, diabetes, and osteoporosis.
This controversy has reignited the debate over whether milk is truly beneficial or potentially harmful. To address these concerns, we spoke with Professor Campbell and Dr. Chen Junshi, an academician from the Chinese Academy of Engineering, to get their insights.
The idea that milk is dangerous is not supported by scientific evidence. In fact, milk remains a nutritious part of a balanced diet. While some online articles argue that drinking milk offers little health benefit and may even be harmful, these views are not backed by comprehensive research.
One of the key studies referenced is the “China Health Survey Report,†which Campbell co-authored. This report analyzed the impact of dietary patterns on health, particularly comparing Western diets high in animal products with traditional Asian diets rich in plant-based foods. The study found that higher consumption of animal proteins was linked to increased risks of chronic diseases. However, it's important to note that this research was observational and did not prove causation.
Campbell’s experiments involved feeding mice diets high in casein, a protein found in milk, and observed its effects when combined with aflatoxin, a known carcinogen. The results showed that mice on a casein-rich diet had more severe tumor growth. However, these findings cannot be directly applied to humans. The experimental conditions—such as using casein as the sole protein source—do not reflect typical human diets.
Dr. Chen Junshi emphasized that the mouse model used in the study is not a direct representation of human physiology. Additionally, the amount of casein consumed in the experiment far exceeds what a person would typically ingest through milk. A single cup of milk contains only about 3 grams of casein, and the daily protein requirement for an adult is around 60 grams. Therefore, the conclusion that milk causes cancer is misleading.
Professor Campbell himself clarified that his research does not claim dairy products cause cancer. Instead, he warns against excessive consumption of animal-based proteins, including dairy, which may have negative health effects. He also stressed that correlation does not imply causation, and that the relationship between protein intake and cancer risk is complex.
In China, where milk consumption is much lower than in Western countries, the focus should be on improving dietary diversity rather than fearing milk. Americans consume over 300 kilograms of milk per capita annually, while in China, the average is just 21.7 kilograms. This significant difference highlights the need for culturally appropriate dietary guidelines.
Ultimately, milk is a valuable food source, providing essential nutrients that support health. When consumed in moderation as part of a balanced diet, it can play a positive role in both children’s and adults’ well-being. As with any food, the key is to maintain a varied and healthy lifestyle.
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