The lowest fat possible. I found this answer by googling, which sums it up very well.
"Cold meats like chicken and turkey slices are allowed when you’re on the Dukan diet but you need to be careful with ham. Dukan does allow reduced fat bacon in his book but there is no mention of ham. If you compared a packet of ham with a packet of chicken slices (that you know are OK) and the nutritional information is similar – then the ham ought to be OK. With all packaged meat slices always check the sodium, some are very high in salt which we want to avoid on the Dukan diet."
Personally, I'd advise using this sort of packaged food as an emergency snack only, and not build meals around it where possible. As you've already noticed, some added ingredients are sent to try us!