Original sentence: The possibility now exists to eliminate antinutrients entirely using genetic engineering, but since these compounds may also have beneficial effects, such polyphenols reducing the risk of cancer, heart disease or diabetes, although such genetic modifications would make the foods more nutritious this might not improve people's health
Edited sentence: The possibility now exists to eliminate antinutrients entirely using genetic engineering; but, since these compounds may also have beneficial effects (such polyphenols reduce the risk of cancer, heart disease or diabetes), such genetic modifications could make the foods more nutritious but not improve people's health