What foods(like bread foods) have citric acid in them?

Question

What I mean by bread foods is like steak, that kind of stuff, well rounded meals, its for some boring science project

Answer 1

Citrus fruits such as lemons and limes are your best bet for the largest quantity of natural citric acid, however citric acid is found in all living cells since it is part of the Krebs cycle, one of the pathways involved in energy production within each cell.

Commercially most citric acid is produces from fermentation of the mold Aspergillus niger.

Answer 2

If science bores you, you'll never learn it.