Single-ingredient organic foods, such as mushrooms, meat and cheese, are easy — anything that’s certified organic by a USDA certifier will bear the USDA Organic seal. There are other seals that denote other standards, such as free-range, hormone-free and natural, but none of these is the same as organic.

When you get into multiple-ingredient foods, it gets a little trickier. But this is where your pizzas will fall, so it’s good to know:

100 percent organic — Pizzas certified to be made with 100 percent organic ingredients

Made with organic ingredients — Pizzas made with at least 70 percent organic ingredients. (Pizzas made with less than 70 percent organic ingredients cannot use the term “organic” other than to identify the specific organic ingredients in the ingredients statement.)