Does dairy contain trans fats?

Trans fats in the diet arise from two main sources: industrially produced trans fats, which are present in foods such as some margarine, fast-food, commercially fried foods and baked goods; and ruminant trans fats (produced naturally by bacteria in the gut of ruminant animals such as cows and sheep), which are present in foods such as dairy products and meat. Trans fats, particularly at high levels of intake, have long been negatively associated with cardiovascular health. While this remains true for industrial trans fats new research about the association between naturally occurring ruminant trans fats in the diet and cardiovascular disease risk is emerging.