Probably the best bet: naturally produced products without using hydrogenation and too much heat.

From the formal standpoint a high-quality fat product should not contain trans fats or contain just a small amount of them.

Sure: but neither “European” nor “round” provide a heuristic for identifying those qualities.

Edit: to expand, a quick look in my fridge shows the following cheese have no trans fats at all.

- Tillamook’s widely available industrial cheddar - Generic brand feta - Generic low-moisture cheddar - Dutch Gouda

We should probably eat good cheese because it tastes better, but I would imagine that trans fat free cheese would encapsulate most common cheese varieties.

As an FYI, added trans fats have been illegal in the US since a few years ago:

https://www.fda.gov/food/food-additives-petitions/trans-fat

Kraft singles have no trans fat.

Neither does plastic

I find that bringing up American cheese is the single fastest way to establish whether someone knows anything about food or not. It's an excellent filter.

American "cheese"

Congrats; you got caught in the filter.

Congrats; american cheese is still trash

American Cheese is fantastic! Kraft Singles American however is trash and I hate that I have to explain the difference or that some people think that's what all American Cheese is like.