Retailers and their staff need to be prepared to reassure shoppers that USA Today and Dr. Cohen have it wrong.

What is dietary fiber?
Dietary fiber can generally be described as that portion of food that is not digested in the human small intestine. It passes into the large intestine where it is partially or fully fermented.

Steve Lankford discusses the role of l-theanine in human nutrition and explores the science of Suntheanine.