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One of the easiest ways that companies can avoid animal testing is to work with products that are actually extensively utilized in human history and still have proven their safety after a while. Companies also can depend on data from natural and synthetic substances that are already previously tested on animals. Computer modeling and databases may be used to determine biological properties of ingredients making risk assessments. Caffeine and sugar like coffee or soda are viewed to become the common and preferable food for overnight employees because such food is able to reduce the tired feeling and help workers stay awake. However, caffeine can result in sleep disorder in the daytime, and individuals working through the night could possibly get with insomnia which causes bad eating habits. Thus, nightshift people should take caffeine amount into consideration with regard to their own health.