Specific symptoms vary by type of anxiety disorder, but typically, anxiety disorders are defined by: Specific phobia (also known as a simple phobia) One of the easiest ways that companies can avoid animal exams are to use items that are already extensively found in human history and also have proven their safety over time. Companies could also depend upon data from natural and synthetic ingredients which are already previously tested on animals. Computer modeling and databases may be used to determine biological properties of ingredients and make risk assessments.