Bitter is one of the five basic tastes. Many people find bitter tastes unpleasant; many alkaloids taste bitter, and evolutionary biologists have suggested that a distaste for bitter things evolved to enable people to avoid poisoning.

"Bitter" can refer to:

For beer, bitterness is measured on the IBU scale.

This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix the link, so that it points to the appropriate page.