You should not eat the skin or rind of passion fruit. The skin is tough, leathery, and very hard to digest with an unpleasant bitter taste. While not highly toxic, the rind, especially when unripe, may contain trace amounts of cyanogenic glycosides, which can release cyanide when broken down—a risk not worth taking. The rind's purpose is protective, and once you have the fruit, it is best to discard or compost the skin. However, the seeds inside the passion fruit are edible and nutritious. You can eat the seeds along with the pulp, as they add texture and contain dietary fiber, magnesium, and antioxidants. The pulp and seeds are the enjoyable and safe parts of the passion fruit to consume.