In spite of doomsayers' warnings, there's no substantial body of
evidence that trans-fats have killed anyone. In fact, for multiple
and complex reasons, over the period when trans-fats came into common
use, rates of deaths from heart disease have actually dropped. The
evidence on trans-fats doesn't seem to justify the rush to purge every
ounce of it at any cost. Once again, those who applied the
precautionary principle by telling us to eat margarine instead of
butter -- "just to be safe" --might now be sorry.

IMHO I'd say it's best to avoid eating fat unnecessarily, doing so will help
both your health & your figure. Bread & butter (or margarine) is not exactly
the healthiest thing to eat, as it has little nutritional value & plenty of
calories. As with everything else, if you really like it you can eat it
occasionally but there are much better things to have for breakfast.

There are, of course some 'good fats' out there but as far as I know they
include neither saturated fats nor trans-fats, they're meant to be contained
in fish such as salmon & natural vegetable oils like olive oil.

Trans-fats haven't killed anyone & neither have burgers & fries, pizzas or
ice-creams. It is the obesity caused by ABUSE of such foods that can cause a
premature death. In moderation, butter, margarine & French fries won't kill
anyone, it's really just like alcohol: drink a bottle of spirits a day & you
won't last long, however, a glass of wine can actually be good for you.