From the EAT WILD website...
Grass-fed meats improve fat levels.
Eating moderate amounts of grass-fed meat for only 4 weeks will give you healthier levels of essential fats, according to a 2011 study in the British Journal of Nutrition.
The British research showed that healthy volunteers who ate grass-fed meat increased their blood levels of omega-3 fatty acids and decreased their level of pro-inflammatory omega-6 fatty acids. These changes are linked with a lower risk of a host of disorders, including cancer, cardiovascular disease, depression, and inflammatory disease.
Interestingly, volunteers who consumed conventional, grain-fed meat ended up with lower levels of omega-3s and higher levels of omega-6s than they had at the beginning of the study, suggesting that eating conventional meat had been detrimental to their health.
British Journal of Nutrition (2011) Red meat from animals offered a grass diet increases plasma and platelet N-3 PUFA in healthy consumers. Volume 105, pages 80-89.
Two new studies suggest that grassfed meat and dairy products may reduce the risk of breast cancer.
CLA (conjugated linoleic acid) is a cancer-fighting fat that is most abundant in grassfed products. Two new European studies link a diet high in CLA with a lower risk of breast cancer. In Finland, researchers measured CLA levels in the serum of women with and without breast cancer. Those women with the most CLA had a significantly lower risk of the disease. Meanwhile, French researchers measured CLA levels in the breast tissues of 360 women. Once again, the women with the most CLA had the lowest risk of cancer. In fact, the women with the most CLA had a staggering 74% lower risk of breast cancer than the women with the least CLA.
The most natural and effective way to increase your intake of CLA is to eat the meat and dairy products of grassfed animals.
(A. Aro et al, Kuopio University, Finland; Bougnoux, P, Lavillonniere F, Riboli E. "Inverse relation between CLA in adipose breast tissue and risk of breast cancer. A case-control study in France." Inform 10;5:S43, 1999)