What type of specimen must be protected from light?

The amniotic fluid is the type or kind of specimen that must be protected from light.

Amniotic fluid is extracted from the mother's womb through amniocentesis. The proper handling of such specimen is to wrap it in a brown paper bag to prevent light exposure. This is to ensure specimen integrity since it affects the stability of the plasma. It also becomes degraded when exposed to light which therefore it might affect the interpretation of the specimen.