Biological Effects of Low-Level Exposures, more commonly referred to as BELLE, began as a conference in May 1990. Its members are committed to the enhanced understanding of low-dose responses of all types to human exposures to chemical and physical agents, whether of an expected or paradoxical nature.
The focus of BELLE encompasses dose-response relationships to toxic agents, pharmaceuticals, and natural products over wide dosage ranges in both in vitro systems and in vivo systems, including human populations. While BELLE promotes the scientific understanding of low-level effects, its primary goal is the scientific evaluation of existing literature and ways to improve research and assessment methods.

"This is by far the best book I've read on the science of aging."—Andrew Weil, M.D.

"Life-span Truth Will Set You Free from Age-old Worries," announced the Chicago Tribune upon the first publication of this book. The New England Journal of Medicine confirmed, "For readers interested in aging and longevity, this small book clearly explains the major concepts...extremely enjoyable to read." From NBC Nightly News with Tom Brokaw to Scientific American to the New York Times, S. Jay Olshansky and Bruce A. Carnes have stirred up controversy and brought clarity to an issue often muddled by exaggeration and pseudoscience.

Medical science has uncovered a host of answers to the problems of aging, but many of the most exciting discoveries are buried in scientific journals or overshadowed by popular quick-fix treatments. The Quest for Immortality explains the real science of aging and shows which treatments offered by today's multi-billion-dollar anti-aging industries offer real hope, and which are a waste of money and time.