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The Handbook of Clinically Tested Herbal Remedies


The first U.S. guide to tell you
which brands of herbal products are evaluated in controlled clinical trials.

how many clinical studies support each brand
the strength of the evidence
the therapeutic context
A Haworth Herbal Press Publication

edited by Marilyn Barrett, Ph.D.
with assistance and review by numerous colleagues
including Dr. Varro Tyler and Dr. Tieraona Low Dog

Publication expected early in 2004.

The Handbook of Clinically Tested Herbal Remedies will answer the question of which herbal products to choose and how much evidence supports their use.

This book will only list products whose efficacy is supported by clinical trials. It will tell you how many controlled clinical trials have been conducted on each product. It will provide details of those trials and rate them according to the strength of the evidence in that trial.

With over 40 botanicals, 90 products and 300 clinical studies, this is the book will help you make an informed selection of herbal remedies.

The Handbook of Clinically Tested Herbal Remedies provides consumers and health professionals with a means to distinguish those herbal products that have the backing of clinical data from those for which there is little or no evidence to substantiate claims of efficacy. Details on the products and the trials are included in an easy to read at-a-glance format. An evaluation of the strength of the evidence from the trials, along with the context for therapeutics is included. The book also provides manufacturer contact information.

With the plethora of herbal products on the market, consumers and health professionals are at a loss to distinguish those that have the backing of clinical data from those for which there is little or no evidence to substantiate claims of efficacy. For the first time in the United States, we will compile and publish specific product information along with supporting clinical trial data. Not only will this book be an aid to the health professional and consumer, it will also be an effective marketing boon for those manufacturers who have subjected their products to clinical trial(s).

Objective and Scope
The Handbook of Clinically Tested Herbal Remedies will provide a compilation of information on botanical products whose efficacy has been evaluated by controlled clinical trial(s). Detailed product information, manufacturer contact information, and clinical trial descriptions will be included for quick and easy reference by our target audience. Each clinical trial will be given a "Level of Evidence" rating according to the perceived strength of evidence presented in the trial publication. Evidence for each botanical will be summarized including comments on the use of that herb in a therapeutic context. The book will be prefaced by introductory chapters exploring concepts of botanical efficacy and safety, as well as standardization and "product equivalency".

Marilyn Barrett, Ph.D., founder of Pharmacognosy Consulting Services and author of CRN's "Reference on Evaluating Botanicals", is the principal author and editor.

The book will be published by Haworth Herbal Press, an imprint of The Haworth Press. The editor-in-chief for the publisher is Dr. Varro Tyler, Distinguished Professor Emeritus of Pharmacognosy at the School of Pharmacy and Pharmacal Sciences at Purdue University and co-author of Tyler's Honest Herbal, Tyler's Herbs of Choice, and Rational Phytotherapy.

Dr. Tieraona Low Dog, member of the White House Commission on Complementary and Alternative Medicine and Chair of the USP Dietary Supplement/Botanical Expert Committee has provided a checklist to be used to rate the levels of evidence for the trials. The level of evidence for the clinical studies will be evaluated by numerous physicians/scientists.


The Handbook of Clinically Tested Herbal Remedies will be updated on a regular basis following publication in 2004. Manufacturers are encouraged to present information about newly completed or ongoing clinical trials to Marilyn Barrett..

The Haworth Herbal Press, an imprint of The Haworth Press, Inc.

If you have any questions or would like further information, please contact Marilyn Barrett.

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      Marilyn Barrett, Ph.D. 
      Pharmacognosy Consulting Services 
      900 American St. 
      San Carlos, California  94070 
      Phone: 650-593-5493 
      Fax: 650-593-4421

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