I love coffee, and 1 cup a day is all I've needed for years. Never have I had issues limiting my intake. But I've noticed in spite of improving my dental habit

I love coffee, and 1 cup a day is all I've needed for years. Never have I had issues limiting my intake. But I've noticed in spite of improving my dental habits, my gum health has remained pretty poor. I've wondered if it may have something to do with the acidity of my coffee (no sugar, since I drink it black), so as an experiment, I've tried switching to loose leaf black tea instead. I've noticed I don't get nearly as jittery from a couple cups of black tea vs a cup of coffee. I also get sleepy as I should at normal times in the evening. Completely anecdotal, but at least to me it feels that the rise and fall of the caffeine boost I get is more gradual, without crashes or rougher withdrawals. I do miss the flavor of coffee though; not crazy about the tannins in black tea. I may give matcha a try next.