I stumbled upon this recipe today that involves putting Emergen-C into guacamole! I usually load up on Emergen-C packs when I'm feeling under the weather. I've never thought to incorporate it into foods. It reminds me of the crushed up vitamins in the applesauce trick that my mom used on us growing up. Brilliant!
Check it out, supposedly it slows down the oxidation process as well and keeps your guac greener longer.