ABSTRACT
It seems almost a given now that phytochemicals in our diet have health-promoting effects. The body of experimental evidence supporting this hypothesis (some of which is described elsewhere in this book) is substantial and continues to grow. However, many key questions remain. Which phytochemicals are the most efficacious? How do they work? Do they act independently or synergistically? How much should we consume, and in what form, to achieve optimal health benefits? How does this vary from person to person?
