Does a perishable food discovery token count as food until you exchange it, and when must it be exchanged?

Question

Accepted Answer

The prevailing reading is to exchange a food token as soon as it reaches Available Resources, before the Night phase makes it rot. One thread argues the official FAQ allows keeping it through the Night phase.

Robinson Crusoe: Adventures on the Cursed Island

Does a perishable food discovery token count as food until you exchange it, and when must it be exchanged?