title: Dietary supplements and sports performance: herbals.
abstract: This is the fourth in a series of six articles to discuss the major classes of dietary supplements (vitamins; minerals; amino acids; herbs or botanicals; metabolites, constituents/extracts, or combinations). The major focus is on efficacy of such dietary supplements to enhance exercise or sport performance.
authors.affiliation: Department of Exercise Science, Old Dominion University, Norfolk, VA. mwilliam@odu.edu.
authors.forename: Melvin
authors.initials: M
authors.lastname: Williams