Effects of Herbs and Natural Products on Clinical Laboratory Tests complements AACC's publications on Effects of Drugs on Clinical Laboratory Tests, Effects of Disease on Clinical Laboratory Tests, and Effects of Preanalytical Variables on Clinical Laboratory Tests, which provide the background information necessary to interpret clinical laboratory test values. This publication provides both new entries and entries that were previously considered as being related to Drugs and/or Preanalytical Variables. Unlike other books in the Effects series, Effects of Herbs and Natural Products includes narrative accounts of the history of herbal medicine and a detailed discussion of both clinical and laboratory effects of commonly used herbs and natural products. As with the other Effects publications, condensed information is organized into five sections. The first section lists laboratory tests; and the second, herbs and natural products with appropriate cross-references. The third and fourth sections are alphabetic sorts by laboratory test and by herb or natural product name, respectively. Each entry describes the effect of a specific variable affecting a patient or a specimen removed from a patient, with a succinct explanation of the mechanism of the effect. The fifth and final section is a compilation of all the references, which are sorted in numerical sequence and provided to enable a more detailed understanding of the cited effects.