system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do companies come up with their nutrition facts?
gpt
Work at a bakery: The higher ups have a laptop and a program. The put in the overall ingredient list and the premixed - precooked nutritional facts get spitted out. Then they take some of the made bread and probe it. The program and machine then gives them an estimation. They then do several tests on site with various compounds and either confirm the product or rework.

It's seriously interesting to watch.