system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does grape "flavor" not taste like actually grapes.
gpt
You're probably used to eating red or green grapes of the species vitis vinifera, the common grape. However, grape flavor is designed to mimic the Concord grape (species vitis labrusca), which is what's usually used to make grape jelly, grape juice, etc. If you'd ever eaten a Concord grape you'd taste the similarity, but they are not very commonly eaten the way red/green grapes are.