There have been several recent publications indicating the dangers of different foods which we all eat. For example the World Health Organisation (WHO) published a report which links consumption of bacon to increased risk of cancer. Who would dispute the word of WHO? Coffee? Artificial sweeteners? Pasteurised milk? Bread and wheat products? Saturated fats? What on earth can we eat?
This is a brief but balanced look at the reality: http://www.bbc.com/future/story/20151029-are-any-foods-safe-to-eat-anymore-heres-the-truth