When you’re grocery shopping on the Paleo diet, one thing’s for sure: you won’t be putting many boxes and cans in your cart.

Get ready to shop the perimeter of the store for whole foods, or better yet, head to a farmer’s market for the freshest—and purest—meat and produce you can find. (Specialty health food shops may also carry some Paleo-friendly items the big chains don’t, but you should be able to find most of these foods at your go-to grocer.)

So, are you ready to overhaul your diet? We talked to Mark Sisson, author of The Primal Blueprint, and PaleoPlan.com’s nutrition therapist, Neely Quinn, to come up with a list of Paleo-approved foods—and basic guidelines— to get you started.