The caffeine experiment

What to do: Stop all caffeine — coffee, tea, cola, energy drinks, and dark chocolate.

What to expect: Headache, tiredness, and irritability are common. These are signs your body was dependent on caffeine and usually peak on day 2.

Note: If you currently drink more than 4 cups per day, consider reducing gradually over 2–3 days rather than stopping abruptly, to minimise withdrawal headaches.

Tip: Drink plenty of water and allow yourself an early night. The discomfort is temporary.

What to do: Continue caffeine-free. Record your Kardia each morning and note any palpitations in your diary.

What to expect: Withdrawal symptoms should ease. Pay attention to whether palpitations change in frequency or intensity.

Tip: Do not change anything else this week — keep exercise, sleep, and meals the same so you can isolate the caffeine variable.

What to do: Have one cup of your usual caffeinated drink in the morning. Take a Kardia recording before and one hour after.

What to expect: If caffeine is a trigger, you may notice palpitations return within 30–90 minutes. If nothing happens, caffeine may not be a significant trigger for you.

Tip: Record the exact drink, time, and any symptoms. This is your personal evidence.

If caffeine triggered symptoms: You now have a clear, personal reason to reduce or eliminate it. Many people find they can tolerate small amounts — experiment to find your threshold.

If caffeine made no difference: Good news — you can keep enjoying it. Focus your energy on other potential triggers from your diary.

Tip: Bring your findings to your results appointment. This kind of personal evidence is invaluable.