They say that the harder the cheese, the lower the lactose content. i've got a list of cheeses that have next to no lactose in them... some even recommended for a person with IBD. Processed cheese slices, or cheese spreads, are hi in water and lactose. i've found and tried, with good results, hard cheeses that are low in fat N low in lactose. But, for processed cheese slices, I have to use a veggie equivalent. Or, for example, I am extremely sensitive to mozzarella, and even a low fat mozzarella hits me hard. but a soya equivalent I found that both tastes like mozza, cooks like mozza, and looks like mozza, doesn't bother me at all. I always used to think that pizza bothered me due to fat content, not so!!