Life Cinco de Mayo: Before making guac for a party, the FDA has some advice for you December 21, 2018May 5, 2019 Zlati Meyer, USA TODAY Comments Off on Cinco de Mayo: Before making guac for a party, the FDA has some advice for you The concern is that when you cut into an avocado, the knife could bring pathogens on the peel to the edible fleshy part.