Not all trans fats are bad…..and not all trans fat are man-made!
Look-up Vaccenic Acid on Wikipedia. Vaccenic acid is a naturally occurring trans fat found in the fat of ruminants and in dairy products such as milk and yogurt. It is also the predominant ‘trans-fat’ in human milk.
Not all saturated fat is bad eg. short chain fatty acids are saturated and they help lower fatty deposits in our arteries.
Stearic acid found in chocolate actually lowers LDL