| Literature DB >> 448171 |
N Orentreich, J Markofsky, J H Vogelman.
Abstract
The linear nail growth rate is a simple, inexpensive, noninvasive technique for the measurement of aging. When the many endogenous and exogenous factors known to influence this rate are either controlled or considered, the measurement of the rate for 1 year gives data that are both age-related and age-caused. The rate of linear nail growth decreases 50% over the life spans of both dogs and humans. In the beagle, which has a life span 20% that of man, the rate of decrease is 5 times faster than in man. There are circadian and multiple-year biorhythms of the rate of linear nail growth. There are approximately 7-yr periods of slow decline that alternate with 7-yr periods of more rapid decline.Entities:
Mesh：
Year: 1979 PMID： 448171 DOI： 10.1111/1523-1747.ep12532799
Source DB: PubMed Journal: J Invest Dermatol ISSN： 0022-202X Impact factor: 8.551