it's a great counterpoint, because they're is a lot of literature on the health effects of caffeine.
> Maybe both aren't great for you?
Maybe? You are the one making strong assertions about vasoconstrictors. Maybe you should take this opportunity to challenge your beliefs on this by digging into scientific literature.
Also, "aren't great" is such a softening of your original opinion "just terrible". Why argue for your ignorance when there is actual scientific literature?