One of the main types of trans fat in people’s blood — called vaccenic acid — dropped by more than half in just nine years, showing that people were eating less of these harmful fats overall.

In the U.S., the amount of harmful fats from processed foods in people’s blood dropped by more than half between 2000 and 2009, likely because food labels and restaurant rules changed to cut down on these fats.

A type of fat found in milk and meat turns into another fat called conjugated linoleic acid in the body, and that second fat might be good for your health.

People with more of a specific fat found in dairy products like butter and cheese in their blood have a lower chance of getting type 2 diabetes, even after accounting for how much dairy they eat.

Trans fats from dairy and meat don’t seem to harm cholesterol or cause inflammation like the ones made in factories — some might even be a little good for you.