出典:Wikipedia
出典:『Wikipedia』 (2011/07/07 16:49 UTC 版)
Phytochemicals are chemical compounds, such as beta-carotene to cite one well known example, that occur naturally in plants. The term is generally used to refer to those chemicals that may affect health, but are not established as essential nutrients. While there is abundant scientific and government support for recommending diets rich in nutrients from fruits and vegetables, there is only limited evidence that physiological effects result from any specific phytochemicals.