At Starbucks I typically, though not always, get a headache with their normal blend of regular coffee. But with the espresso drinks I don't. Then brewing at home, with some brands I'll get a headache, others not. Also, a brand that I've used for a while sometimes starts to give me headaches. Or if my espresso coffee gets a couple weeks old, it starts giving me headaches when I use my espresso machine.
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