Color is a good indicator of ripeness stage; size and shape may be important in some markets; freedom from defects, insects, and decay; firmness and extent of gritty texture due to the presence of stone cells (sclereids); flesh color depends on cultivar and can be white, yellow, pink, or red; amount of seeds in the flesh (the fewer the better); aroma intensity; soluble solids and acidity.

Guava is one of the richest sources of vitamin C (200 to 400 mg per 100g fresh weight) and some cultivars are also rich in vitamin A.