A type of chemical that plays a role in how the body manages and regulates certain processes or activities. Hormones have a variety of functions, and they can control sexual development, growth, hunger, and mood. They play a particularly important role in sexual arousal.

The hormone most commonly associated with male sexual arousal and development is testosterone; in females, the main sexual hormones are estrogen and progesterone. As hormone production drops off after menopause, many women create less natural vaginal lubrication.

Some lubricant ingredients may affect hormone production or reception. For instance, some newer lubricants include dehydroepiandrosterone (DHEA), which can have a beneficial effect on sexual functionality (see DHEA for more information).