Of the 708 non-organic spinach samples collected by the USDA in 2015, a whopping 96.6 percent had traces of at least one pesticide, and 13.6 percent contained at least ten. For comparison, only 81 percent of lettuce samples contained pesticides, and just 1.1 percent had traces of ten or more, according to the USDA. (Find out how else eight healthy vegetables can sometimes harm you.)
Keep in mind, though, that the mere presence of a pesticide won’t necessarily lead to any negative health effects. The EWG expressed concern that about 71 percent of spinach samples contained some form of permethrin, a pesticide banned in the EU and is considered a “weak carcinogen” by the EPA. Still, the USDA does say low levels of permethrin in foods are safe, and none of the spinach samples exceeded that safe amount. (Find out why women might want to avoid pesticides before getting pregnant.)
What could be more concerning is that some samples did exceed the legal limits of certain chemicals. Eight samples had levels higher than the EPA tolerates, and three samples contained three different pesticides that the EPA doesn’t allow at all. Of the 17 fruits and veggies tested, spinach’s numbers were topped only by strawberries, which had 24 samples with chemicals above the tolerated limits and one sample with four non-tolerated pesticides. (Don’t miss this other common food surprisingly high in pesticides.)
These results only came from conventionally grown spinach, so buying organic could cut down on the number of pesticides you’re exposed to. Organic farmers can still use pesticides, but they have to be natural rather than synthetic chemicals. (Find out if organic tampons are worth the switch.)
If you’re debating which groceries are worth the higher price for organic, spinach should be one of the first ones you buy organic, says Libby Mills, MS, RDN, LDN, FAND, spokesperson for the Academy of Nutrition and Dietetics. The pesticides come directly into contact with the leaves you eat, which could be one reason it ranks so high on the Dirty Dozen, she says. (With organic, you can enjoy these nine health benefits of eating more spinach.) On the other hand, there’s probably no need to shell out for organics with fruits with a natural barrier you peel away, like bananas and avocados, Mills adds.
Regardless of whether you pick organic or conventional spinach, rinse them when you get home. Try submerging the leaves fully in a bowl of cold water, then rinse with a colander and repeat, says Mills. “Washing your fruits and vegetables is a simple way to remove a large percentage of things that might be left on the surface,” she says. Once the leaves are clean, try these ten tasty ways to sneak more spinach into your family’s meals.