Are there any herbal values in the "Star Fruit" found mostly in Malaysia?

Answer 1

Star fruit are an excellent source of vitamin C, and also supply some vitamin A and fiber.

However, I will cut and paste this warning:

Star fruit causes several symptoms in patients with chronic renal failure or end-stage renal disease. The symptoms vary and include insomnia, intractable hiccups, agitation, muscle weakness, confusion, consciousness disturbances of various degrees, seizures, and cardiorespiratory arrest. The various star fruit subspecies contain different toxins, including a powerful neurotoxin that is suspected to accumulate in blood, cross the blood-brain barrier in chronic renal failure patients, and eventually cause irreversible damage.
Star fruit intoxication is a neglected but serious fruit intoxication frequently observed in patients with chronic renal failure. Because no effective treatment is currently available, patients— especially those who are newly diagnosed with chronic renal failure or end-stage renal disease—must be warned not to ingest star fruit, even in small amounts.