Why Do Avocados Turn Brown When Cut Open?

- May 06, 2018-

  An enzyme in avocados causes the flesh to oxidize when exposed to air, turning it an unappealing brown color. This is why an avocado is often green underneath the pit but brown on the exposed surfaces surrounding it the surface underneath the pit is protected from oxygen. But the protection is not about the pit itself, only the way the pit acts as a barrier.