Are there certain types of food that people with ocd should avoid?

No -- can eat all: People with ocd may avoid certain foods because of their illness -- but can realistically eat any food they wish. Sometimes people with ocd have obsessive thoughts about particular foods, compulsively check any seeming irregularity/discoloration, or have eating rituals that must be followed precisely. It can take a long time to eat a meal, and there might not be much enjoyment.