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) The more milk a cow produces, the more dilute the vitamin content of her milk
The goal of the commercial dairy industry is to coax the maximum amount of milk out of each cow through a high-tech combination of selective breeding, confinement housing, synthetic hormones, and a high-energy grain diet. It has succeeded admirably. Today’s super cows produce as much as 17,000 pounds of milk per cycle—20 times more milk than a cow needs to sustain a healthy calf. Unfortunately for consumers, the cow transfers a set amount of vitamins to her milk, and the greater her milk volume, the more dilute the vitamin content of the milk, especially vitamins E and beta-carotene. According to the journal article cited below, “It follows that continuing breeding and management systems that focus solely on increasing milk and milk fat yield will result in a steady dilution in the milk fat of these vitamins and antioxidants…”
Dairy cows raised on pasture and free of hormone implants produce less milk than commercial cows, but the milk is therefore richer in vitamin content. This is one of those times when less is more.
(Jensen, S. K. “Quantitative secretion and maximal secretion capacity of retinol, beta-carotene and alpha-tocopherol into cows’ milk.” J Dairy Res 66, no. 4 (1999): 511-22. )