Guava originated in the tropical region of Central Americas and reached South-East Asia approximately in the 17th century. Guava fruit is either round or pear-shaped, with thin dark green skin which becomes yellowish green as the fruits ripen.
Guava is often ready to eat when it is green and crisp. The flesh is crunchy much like eating a slice of apple. The taste is pleasant with mildly acidic flavour. Some Vietnamese however like to eat the guava when it is not completely ripe (Ổi sống) together with a dip made of fish sauce (Nuoc Mam), chili salt and sugar. Sometime, the guava slice is dipped in a mixture of salt and grounded red chili pepper.