The food you ate today was probably disgusting. If yours was a processed meal, it could easily have included a full day's worth of salt, fat, and calories. But this isn't breaking news. Most of us have a vague idea that we're running on junk — it's cheap and delicious, yet we eat it anyway.

Would you make the same food choices if you knew some of the secret ingredients of your daily diet? There's only one way to find out. You might not want to read this during lunch.

By Amanda Green.