Internationally known scientists review what has been accomplished thus far in developing acceptable alternatives to classical animal toxicity assessment methods. Authoritative chapters describe not only the many practical alternative approaches that have recently emerged, but also consider current trends and likely future approaches, as well as emerging automated assessment techniques. Hazard assessment applications and the validation of new alternative methods are also discussed. The methods presented here will help toxicologists, cosmetic chemists, and pharmacologists greatly reduce, refine, or even possibly replace, the use of laboratory animals in their work. Life science researchers will also find many new opportunities for detecting endocrine disruptions. Regulatory officers will gain a new perspective on alternative assessment, environmental assessment, and risk assessment. Significantly extending the efforts of the National Institutes of Health, the European Union, and the ICCVAM, Toxicity Assessment Alternatives offers all those evaluating toxicity today a cutting-edge collection of practical and highly effective alternatives.