This text investigates the complex methodologies required to accurately assess human health risks associated with the dermal and inhalation exposure to toxic substances. The authors, Howard I. Maibach, James B. Knaak, and Rhoda G. M. Wang, synthesize decades of toxicological research to establish a rigorous framework for evaluating how chemicals penetrate biological barriers. By integrating pharmacological data with environmental exposure models, the book provides a systematic approach to quantifying absorption rates and systemic toxicity in diverse populations.

Experts in the field of toxicology recognize this work as a technical reference for professionals involved in chemical safety and regulatory policy. Readers frequently note the high density of the prose and the reliance on specialized pharmacokinetic data, making it a resource primarily intended for researchers and practitioners rather than the general public.