Cardiologists Have Warned Against This Fat for Decades. New Research Shows One Common Source Doesn’t Spike Heart Risks

If you've spent any time reading nutrition labels, you've probably learned to treat trans fat like a red flag. And for the most part, that's good advice. Industrially produced trans fats have a well-established reputation for raising LDL (aka the "bad") cholesterol, lowering HDL (aka the "good") cholesterol, and increasing the risk of cardiovascular disease.