Coffee is one of those things - you either love it or hate it. You know if you like the taste or not (or if it’s just a reason to drink sugar and cream). You know how it makes you feel (i.e. your gut, your mind, etc.).
Not to mention the crazy headlines that say coffee is great, and the next day you should avoid it!
There is actual science behind why different people react differently to it. It's a matter of your genetics and how much coffee you're used to drinking.
NOTE: Coffee does not equal caffeine. Coffee contains between 50-400 mg of caffeine/cup, averaging around 100 mg/cup. Coffee is one of the most popular ways to consume this stimulant. But… a cup of coffee contains a lot of things over and above the caffeine. Not just water, but antioxidants, and hundreds of other compounds. These are the reasons drinking a cup of coffee is not the same as taking a caffeine pill. And decaffeinated coffee has a lot less caffeine; but, it still contains some.
Let's look at...
No question that what you eat can affect how you feel, right?
I know it effects me big time! I don't know why but it took me YEARS of trial and error and becoming extremely self-aware of how I felt if I ate certain foods and took certain supplements.
If I eat too many carbs or sugar without protein and fat to balance it out, I feel jittery, then I have a "crash" afterwards. I also get hangry which is not a pretty sight! Also, if I don't take my supplements, then I start feeling fatigued, anxiety-ridden and don't have as much energy.
Plus I am VERY sensitive to caffeine and alcohol. If I drink coffee, I am a total and complete mess afterwards and I feel like jumping out of my skin. If I drink alcohol, even just one glass of wine, then I feel awful the next morning.
The funny thing is that I ignored all of the physical and mental signs for a very long time and just ate and drank what I wanted. My motto was "moderation is key" but that didn't work for me in the end.