How are food items ranked according to their estrogenic activity?

Food items are ranked according to their estrogenic activity based on their estrogen content. This measurement reflects the presence and concentration of phytoestrogens, compounds found in various foods that can mimic estrogen in the body. By assessing the estrogenic activity, researchers can determine which foods might have a more significant impact on hormonal levels and overall health.

Weight, freshness, and expiration date, while relevant in other contexts such as nutrition and food safety, do not provide an appropriate basis for evaluating the hormonal effects of food items. Instead, the focus on estrogen content allows for a precise understanding of how different foods may influence estrogen levels in organisms, which is crucial for studies related to reproductive health, hormonal balance, and related health issues.