- If the PLU code is preceded with an 8, it is a GMO food.
- If the PLU code is preceded with a 9, it is an organically food.
- If the PLU code is NOT preceded with an 8 or a 9 – it’s simply a four-digit number beginning with 3 or 4 – it is a conventionally grown food.
So at a quick glance, you can easily see if a food is grown conventionally (starts with a 3 or 4), grown organically (starts with a 9) or is a GMO food (starts with an 8).