Buttermilk is a rich source of bioactive polar lipids and proteins. The effect of these molecules in cancer management has been known for over 40 years. This study compared the growth modulatory effects of buttermilks with a different composition on a human colon cancer cell line.
Complex lipids present in dairy products have been shown in earlier studies to suppress the colonic cell proliferation and early lesions of colon cancer in mice. The anticancer effect was influenced by heat treatment. Other processing steps, such as washing, centrifugation and microfiltration could be critical for the value of buttermilk as a functional food as well.
The nuts and bolts
In this study, buttermilk was prepared by separating the cream and skim milk by centrifugation. Part of the cream was washed by adding water and repeating the centrifugation. After pasteurization, all cream was churned to release buttermilk, which was then filtered over a membrane. The original feed, the filtrate and the fraction recovered on the membrane were analyzed for anticancer properties.
All buttermilk samples inhibited the proliferation of three colon cancer cell lines. Washing the cream increased the anticancer activity. A deeper analysis of the different fractions with the ability to identify the lipids individually is required to identify the specific compounds responsible for the observed anticancer activity.
Further investigations are needed to assign anticancer properties to buttermilk and investigate the mode of action, genetic influences on the effect, etc. While washing the cream was shown to increase activity, this additional processing step will increase the buttermilk price. A detailed analysis should be performed to investigate if the effect is large enough to warrant this additional cost.
How will this help me?
Buttermilk is a natural byproduct of butter manufacturing, well tolerated and suitable for human consumption. The recommended daily intake of fresh and fermented milk products is 250 mL per day. While the effect remains to be confirmed, a similar daily consumption of buttermilk fulfills this need and may have an additional value for cancer patients. This study showed buttermilk of different compositions could inhibit the growth of cancer cell lines.
Anticancer Activity of Buttermilk Against SW480 Colon Cancer Cells is Associated with Caspase-Independent Cell Death and Attenuation of Wnt, Akt, and ERK Signaling – Nutrition and Cancer (2016)