: Technically a legume, peanuts grow underground in moist soil, making them highly susceptible to mold (like aflatoxin) and fungi. They are often heavily treated with pesticides that can be absorbed directly into the soft, permeable shell.

: Often wild-harvested in the Amazon, which significantly reduces the likelihood of synthetic pesticide use during growth.

Foods to Buy Organic: Beyond the Dirty Dozen - Go Dairy Free

: Reported to have some of the highest pesticide residue loads, particularly from insecticides and herbicides used during large-scale production in California.

These varieties are frequently flagged for having the heaviest pesticide loads in conventional farming: