This is the pitya – aka:dragon fruit – indigenous to Central America but is also grown and exported from several Southeast Asian countries, such as Thailand and Vietnam.

Dragon fruits have a surprising number of phytonutrients. Rich in antioxidants, they contain vitamin C (equivalent to 10 percent of the daily value), polyunsaturated (good) fatty acids, and several B vitamins for carbohydrate metabolism, as well as carotene and protein. Calcium is present for strong bones and teeth, iron and phosphorus for healthy blood and tissue formation. The benefits are realized in a number of ways, from a strengthened immune system and faster healing of bruises and wounds to fewer respiratory problems.

Dragon fruits have zero complex carbohydrates, so foods can be more easily broken down in the body, helped by vitamin B1 (thiamin) and other B vitamins. The phytochemical captin, used as a medication to treat heart problems, is present in the fruit itself, and an oil in the seed operates as a mild laxative.
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The seeds of dragon fruits are high in polyunsaturated fats (omega-3 and omega-6 fatty acids) that reduce triglycerides and lower the risk of cardiovascular disorders. Eating dragon fruit can help the body maintain such normal function as ridding the body of toxic heavy metals and improved eyesight. Lycopene, responsible for the red color in dragon fruit, has been shown to be linked with a lower prostate cancer risk.