What does the price look-up (PLU) code on produce indicate?

Dr. Michael Roizen, MD
Internal Medicine
The little tag on fruits and vegetables -- called the price look-up (PLU) code -- holds a world of info:
  • A four-digit PLU code starting with the number 4 indicates conventionally grown and not genetically modified. Produce with this code may have been sprayed with synthetic pesticides.
  • A five-digit code beginning with 9 indicates organic, not genetically modified.
  • A five-digit code starting with an 8 indicates genetically modified.

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