Shocking. I know.
An early excerpt from Elmer’s spell book…
The material enclosed in the box below is released via the Open Game License.
Level: Brd 1, Sor/Wiz 1
Components: V, S
Casting Time: 1 standard action
Duration: 10 min./level
You may glean a great deal of information from the food you eat. With a single bite of food, you may discern all of the ingredients of that food, including whether the food is poisoned and, if so, the exact type of poison used.
For the duration of this spell, you gain a +10 enhancement bonus to all Appraise, Craft, and Knowledge (local) skill checks concerning food and drink. The enhancement bonus increases to +20 at caster level 5th, and to +30 (the maximum) at caster level 9th.