system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does what we eat and drink eventually become so much different stuff like skin, brain cells, hormones etc.? Are our fingernails really just remnants of dinners gone by?
gpt
What we eat is essentially building blocks for our body. When we digest the food, our body breaks the pieces apart into individual blocks. Our body then reassembles the building blocks in a different order to create the parts it needs. Some of the food is used as energy for this reassembly to occur. But yes, you are essentially made out of the food that you eat.