Eggs contain formaldehyde

They sound like horrific chemicals you'd find in processed food.
But aspartic acid, isoleucine and ethyl butanoate are in fact found in a banana.
Likewise - did you know that when you eat an egg, you're eating glutamic acid, E160e and even formaldehyde?
'I wanted to erode the fear that many people have of ‘chemicals’, and demonstrate that nature evolves compounds, mechanisms and structures far more complicated and unpredictable than anything we can produce in the lab. These posters aim to show that chemistry isn't artificial and dangerous; but that chemistry is natural and everywhere. The chemistry of fun, friendly, everyday objects like bananas is more complicated and more fascinating than that of, say, a bomb.'
He added that chemistry has suffered in recent years from a negative image. 
'Pesticides, poisons, drugs and explosives seem to dominate the public's perceptions of Chemistry while the other sciences bask in a much more positive light.

Source  - Daily Mail