Trans fats are bad for you. Consuming these hydrogen-added fats do everything bad to your cholesterol that's possible. They raise the bad cholesterol and lower the good cholesterol. Over the last decade, awareness about the side-effects of trans fats have caused many food manufacturers and restaurants to stop using them. This has started to have a good effect on health.
In a study of white adults, they found fewer trans fats in the bloodstreams than were there in 2000. Not just a small decrease, either, but 58% less. That's a huge change in a short time. Hopefully, we will continue to see a drop in trans fats. There are efforts to ban trans fats. I don't know if that is the answer, but awareness is really working. Public demand for food without trans fats will keep pushing manufacturers to avoid using them.