Phyto-oestrogens, such as lignans and isoflavonoids, are plant-derived compounds that may influence hormone production, metabolism, and action. The authors suggest that the Western diet, compared to the semivegetarian diet of some Asian countries, may contribute to the higher incidence of hormone-dependent cancers and chronic diseases in Western countries. These compounds, found in soy products, whole grains, seeds, and berries, are converted by intestinal bacteria into hormone-like substances that may have protective effects against cancer and other diseases. They may also help reduce menopausal symptoms and prevent osteoporosis. However, their effectiveness in preventing disease is not fully established. Animal studies suggest that these compounds may prevent cancer and atherosclerosis, but the results are not always clear due to the difficulty in separating their effects from other dietary components. Recent evidence indicates that these compounds may play a role in both the promotion and initiation stages of cancer. The review discusses the concentrations of these compounds in various foods, their metabolism in the body, and their potential health benefits. It also highlights the importance of further research to determine the exact dietary amounts needed for disease prevention. The review concludes that phyto-oestrogens may have significant health benefits, particularly in reducing the risk of cancer and other chronic diseases.Phyto-oestrogens, such as lignans and isoflavonoids, are plant-derived compounds that may influence hormone production, metabolism, and action. The authors suggest that the Western diet, compared to the semivegetarian diet of some Asian countries, may contribute to the higher incidence of hormone-dependent cancers and chronic diseases in Western countries. These compounds, found in soy products, whole grains, seeds, and berries, are converted by intestinal bacteria into hormone-like substances that may have protective effects against cancer and other diseases. They may also help reduce menopausal symptoms and prevent osteoporosis. However, their effectiveness in preventing disease is not fully established. Animal studies suggest that these compounds may prevent cancer and atherosclerosis, but the results are not always clear due to the difficulty in separating their effects from other dietary components. Recent evidence indicates that these compounds may play a role in both the promotion and initiation stages of cancer. The review discusses the concentrations of these compounds in various foods, their metabolism in the body, and their potential health benefits. It also highlights the importance of further research to determine the exact dietary amounts needed for disease prevention. The review concludes that phyto-oestrogens may have significant health benefits, particularly in reducing the risk of cancer and other chronic diseases.