Goiaba (pronounced goi-ah-ba), also known as guava, is a tropical fruit similar in size to an apple or pear with hard green outer rind. The flesh of the fruit is a pink, creamy pulp with small seeds. It has a sweet taste and a bouquet of sweet, flowery aromas that can be difficult to describe yet not easily forgotten and definitely unique. 

The most dominant vitamin in Goiaba is Vitamin C, but many of the B Vitamin complex are also present in addition to many other minerals that restore essential body electrolytes like potassium, phosphorus, manganese and magnesium. 

Scientific studies suggest that regular consumption of fruits rich in vitamin-C helps the human body develop resistance against infectious agents and harmful free radicals. Furthermore, it is essential for collagen synthesis within the body. Collagen is one of the chief structural protein in the human body necessary for maintaining the integrity of blood vessels, skin, organs, and bones. 

The fruit is also a good source of Vitamin-A, and flavonoids like beta-carotene, lycopene, lutein and cryptoxanthin. The compounds are known to have antioxidant properties and therefore essential for optimum health. 100 g of pink guava fruit provides 5204 µg of lycopene, nearly twice the amount than in tomatoes. (100 g tomato contains 2573 µg of lycopene). Studies suggest that lycopene in pink guavas prevents skin damage from UV rays and may offer protection from prostate issues. 

Goiaba is a good source of potassium. It contains more potassium than other fruits like banana per weight. Potassium is an important component of cell and body fluids that helps controlling heart rate and blood pressure. 
Further, the fruit is also a moderate source of B-complex vitamins such as pantothenic acid, niacin, vitamin-B6 (pyridoxine), vitamin E and K, as well as minerals like magnesium, copper, and manganese.