Organic produce, according the US Department of Agriculture, has been created without the use of synthetic fertilizers, irradiation, or genetic engineering. Organic animal products can’t be made with antibiotics or growth hormones, and the animals must be fed organic food.
Contrary to popular belief, the organic label doesn’t prohibit the use of pesticides (only synthetic ones), and while organic animal products contain more beneficial fats, fruits and vegetables probably aren’t any more nutritious than the conventional kind ((Nutritional quality of organic foods: a systematic review. Dangour AD, Dodhia SK, et al. American Journal of Clinical Nutrition, 2009 Sep;90(3):680-5.)). Nonetheless, organic food is usually a more environmentally-friendly choice, there contain fewer pesticides, and organically farmed animals are treated more humanely.