Stomach vs sparkle
Bright fruit in the cup is not the same as how coffee sits in your stomach. Sparkle is a tasting descriptor (perceived acidity, like citrus or blackcurrant). It is not a pH lab score, and it is not a medical claim.
Looking for a gentler morning cup?
If sparkle or high citric acidity bothers you, start with single origins this catalog already designates as gentler: Brazil naturals (round chocolate, low sparkle), Sumatra wet-hulled lots (heavy body, cedar, and cocoa), and cold brew in a jar (no kettle required, a slower extraction that many find easier on digestion).
When sparkle is the intended character
Washed Yirgacheffe and Kenya are meant to sparkle with citrus and floral brightness. That is the point of those lots, not a roasting or brewing defect. If you love lemonade brightness, keep them. If you want a rounder cup, pick a gentle origin or cold brew instead of blaming the kettle first.