The latest h-index of Annual Review of Biochemistry is 268.
The h-index is defined as the maximum value of h such that the given author/journal has published h papers that have each been cited at least h times. This index can be widely applied to the productivity and impact of a scholarly journal, individual researcher or a group of scientists, such as a department or university or country. The index was suggested in 2005 by Jorge E. Hirsch and is sometimes called the Hirsch index or Hirsch number.
The index works properly only for comparing scientists or journals in the same field, since citation conventions differ widely among different fields. H-index intends to address the main disadvantages of other bibliometric indicators, such as total number of papers or total number of citations. Total number of papers does not account for the quality of scientific publications, while total number of citations can be disproportionately affected by participation in a single publication of major influence (for instance, methodological papers proposing successful new techniques, methods or approximations, which can generate a large number of citations), or having many publications with few citations each. The h-index can simultaneously measure the quality and quantity of scientific output.