Is it safe to sometimes eat processed food in pregnancy third trimester (33 weeks). I normally always eat fresh home cooked food and do not eat outside food. But sometimes feel like adding ketchups and eggless mayonnaise to home made sandwiches or have chips with it. I notice that ketchups and sauces have stabilizers and preservatives and chips can have artificial flavours. Is it safe to occasionally eat ( one a month) or can they cause any harm directly? Thank you in advance for answering my query.