Chew one piece about 20 minutes before you need it working.
If your wall is at 2:30, chew at 2:10. Before a gym session, chew in the car on the way. Before a long call, chew while you're pulling up the agenda.
Most people feel it within 10–15 minutes. Not a dramatic buzz — just the clarity of actually being present in whatever you're doing, without having to drag yourself back to it every few minutes.
Start with one piece. Each piece has 50mg of caffeine — equivalent to about half a strong coffee, but absorbed faster and with L-theanine alongside it.