2. Spinach
We’re not questioning the nutritional benefits of spinach, because their are many. Spinach contains high levels of vitamins C and K as well as protein, and makes for a great energy-boosting treat. However, all of those benefits are negated if you buy non-organic. Conventional spinach is on the top of the “dirty dozen” list and contains over 65 different pesticide residues that you simply can’t wash off. These pesticides can lead to hormonal problems and even weight gain. Therefore, go organic all the way.