Yeah, I’ve had something similar happen before. Sometimes it’s just how the machine heats or extracts — a tiny temp difference can make the coffee taste burnt. Maybe try a slightly lighter roast or let the machine cool a bit between shots?
I usually start my mornings with a strong cup made in a French press. Sometimes I’ll add a splash of oat milk if I’m in the mood, but most days it’s just black. It’s kind of my quiet moment before the day gets going.
The current study demonstrates that doses of about 400 mg caffeine have some potential to enhance the beneficial effects of training via an increase in bioavailable testosterone.