Competing Interests: The authors are conducting the first randomized clinical trial of caloric restriction in non-obese humans, funded by the National Institute on Aging (Bethesda, Maryland, United States).

Citation: Heilbronn LK, Ravussin E (2005) Calorie Restriction Extends Life Span— But Which Calories? PLoS Med 2(8): e231 doi:10.1371/journal.pmed.0020231

*To whom correspondence should be addressed. E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Eric Ravussin is director of the Health and Performance Enhancement Division at Pennington Biomedical Research Centre in Baton Rouge, Louisiana, United States of America, and Leonie K. Heilbronn is a NHMRC, Peter Doherty Australian Biomedical Fellow at the Garvan Institute in Sydney, Australia.

Published: August 30, 2005

Copyright: © 2005 Heilbronn and Ravussin. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This article was published in PLoS Medicine online .

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