Alright, lets not get carried away here.

Princess is right, oatmeal DOES contain phytic acid which has been shown to inhibit zinc and sometimes copper absorption. (1,2) On the plus side, new studies coming out suggest that the phytic acid might be more of a contributing factor for the slow blood sugar rise after eating, i.e. glycemic index. (3)
I don’t think these guys in here are eating oatmeal for it’s zinc content.

And so what if it’s blocked, they still have five more meals to go throughout the day to get all the zinc they need, not to mention multi mineral packs. And if that’s the only way to ingest oatmeal, be it due to time or the taste factor…JUST DO IT!

1. Dephytinization of a Complementary Food Based on Wheat and Soy Increases Zinc, but Not Copper, Apparent Absorption in Adults1
Ines Egli, Lena Davidsson2, Christophe Zeder, Thomas Walczyk and Richard Hurrell
Laboratory for Human Nutrition.
2.A High Oat-Bran Intake Does Not Impair Zinc Absorption in Humans When Added to a Low-Fiber Animal Protein-Based Diet1
Brittmarie Sandström*2, Susanne Bügel*, Brian A. McGaw , John Price** and Martin D. Reid**
3. NIDDM, Diabetes forum 2005