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I believe that is a factor of caffeine increasing blood flow, leading to quicker delivery within the body

My guess would've been CYP3A4, but you could be right.

I found a study of caffeine producing grapefruit-like inhibitory effects on some people https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5625156/

> but in combination with caffeine it works great

I recently heard about goody's when we ran a marketing campaign for them.

The nascar themed marketing was probably why i hadn't heard of it but I did end up trying it and the mixture of the two works great

That's pretty much what I do. One or two cups in the morning and I tend to skip that on weekends.

A lot of medicines have a version with caffeine to make it more efficient and prevent sleepiness.