There’s no conclusive evidence that organic produce has higher levels of vitamins and other nutrients than nonorganic produce. A few studies have found small differences in the amounts of some types of vitamins among some types of crops, but for the most part research on nutrition density in organic versus nonorganic produce has found no discernible differences.

On the other hand, there do seem to be nutritional differences between organic dairy/meat and nonorganic. Organic milk typically has more vitamins, antioxidants, and omega-3 fatty acids than nonorganic milk because of the higher levels of pasture diet the cows get. Organic meat from cattle also tends to have higher levels of omega-3 fatty acids than nonorganic meat because of pasture diets. In addition, organic, grass-fed meat typically has lower fat content overall than meat of nonorganic animals, which are often fed a high-corn diet.