Pomelo is a large, citrus fruit, considered as an ancient ancestor of the grapefruit. pomelo is grown in many eastern countries, which include Japan, Thailand, Fiji and Malaysia. Widely used in many authentic dishes from of Southeast Asia and Malaysia. Pomelo is an excellent source of vitamin C, providing a whopping 619% of your daily recommended needs in one fruit. You'll also benefit from small amounts of thiamin, riboflavin, niacin, and vitamin B6 when you consume this citrus fruit. Minerals in pomelo include potassium (38% of your daily recommended needs) and smaller amounts of phosphorus, copper, iron, calcium, magnesium, manganese, and zinc.