Dietary supplements are big business. A UK nutritionist updates information since the 2007 edition on some 100 supplements including vitamins, minerals, herbs, oils, and probiotics. Mason presents UK and US legal definitions, findings from dietary surveys, and guidelines for recommending supplements to patients. From acai to zinc, profiles include a general description, dietary sources, mechanism of action, possible uses, deficiency data (if applicable), safety information, dose, references, and summaries of any clinical trials. New monographs include those on 5 HTP, Dong quai, arginine, and red rice yeast. The volume includes tables on the safe upper levels of vitamins and minerals, drug and supplement interactions, and further resources. Annotation ©2012 Book News, Inc., Portland, OR (booknews.com)