Some differences in the production of organic and conventional milk include the following:
*Dairy cows raised for organic milk production are not given antibiotics and/or synthetic growth hormones.
*Organic dairy cows must be raised on 100% certified organic feed, not from genetically modified sources.
* Organic dairy cows must only graze on certified organic pasture free of herbicides, pesticides, or synthetic fertilizers.
Conventional milk also differs from organic milk in its nutritional benefits. This is due to organic milk's higher level of anti-oxidants and decreased levels of pesticide residues (which are of concern to children, pregnant/breastfeeding women). Organic milk also has higher amounts of nutrients like vitamin E, beta-carotene, and omega-3 fatty acids. Furthermore, organic milk has higher levels of conjugated linoleic acid (CLA) which is a healthy trans-fatty acid as it increases metabolic rate, immunity to certain diseases (i.e. Adult Onset Diabetes, Heart Disease), and muscle growth. It also reduces overall body-fat mass, cholesterol, and allergic reactions. The human body does not naturally produce CLA and thus most of our intake occurs through milk and milk products consumed. For all of the above reasons, buying organic milk is a smart choice to make for yourself and your family.
Sources:http://www.organicfacts.net/organic-animal-products/organic-milk/http://www.organicvalley.coop/community/beyond-the-plate/wake-up-organic/1/