Researchers measured the blood concentration of fatty acids (found in dairy foods) in over 4,000 men in their 60s.  The men were followed for the next 16 years recording how many died or had heart attacks, strokes, or other heart issues.

Results: heart disease risk was lowest for the men with the highest levels of dietary fatty acids.

Higher intakes of dairy fat were not associated with increased risk of death.

These results confirm a 2018 study that also found consumption of full fat dairy products protect against heart disease and stroke.