Gustatory enhancement is the experience of tastes becoming significantly richer, stronger, and more noticeable than that of everyday sobriety. This experience can either be positive or negative depending on the substance, the taste, and the person's prior opinion of the taste. For example, while certain tastes may become a true delight in a manner which results in appetite enhancement, other tastes may become overpowering in an unpleasant manner which can potentially trigger nausea or even vomiting. Gustatory enhancement is most commonly induced under the influence of moderate dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline. However, it can also occur under the influence of cannabinoids and stimulants.