Yerba Buena is an herb of the mint family. It is an aromatic plant used as herbal medicine worldwide. This perennial plant’s growth ranges from 0.6 meters to 1 meter. It has elongated leaves and in summers, it bears small whitish or purplish flowers. Such flowers possess both male and female organs that allow it to be pollinated by bees and animals of the same nature. The word Yerba Buena is Spanish for "good herb" and was the former name of the California city of San Francisco.

Before its medicinal value has been recognized, Yerba Buena was first used as an ingredient in numerous cuisines. It became popular because of its distinctively strong spearmint flavor, thus making it ideal for salads. The leaves are the source of this flavor, and they may be added to viands and meals, either raw or cooked. It has also been effective to drive away rats and other rodents, because of its strong smell of mint that it emits. Thus, besides its medicinal value, it has long been recognized to have strong commercial demand due to the variety of uses that the plant have.

Yerba Buena has been consumed for centuries as tea and herbal medicine as a pain reliever (analgesic). Native American Indians used it even before the "white men" colonized the Americas. Today, this folk medicine's efficacy has been validated by scientific research. In the Philippines, Yerba Buena is one of the 10 herbs endorsed by the Department of Health (DOH) as an effective alternative medicine for aches and pains. It has been recognized for its antiseptic, anti-cancer, diuretic, anti-spasm, anti-emetic activities. Properties of this herbal plant are also found to function as stimulant and to have restorative effects.