6. Increased Anxiety or Jitters
Too much caffeine can overstimulate the nervous system, leading to nervousness, shakiness, or a racing heart—especially in caffeine-sensitive individuals.
7. Sleep Disruption
Even morning coffee can affect sleep for people who metabolize caffeine slowly. Possible effects include:
- Difficulty falling asleep
- Lighter sleep
- Frequent nighttime awakenings
8. Acid Reflux or Stomach Irritation
Coffee increases stomach acid production and may worsen symptoms of:
- GERD
- Heartburn
- Gastritis
9. Caffeine Dependence and Withdrawal
9. Caffeine Dependence and Withdrawal
Daily coffee consumption can lead to dependence. Skipping your usual cup may cause:
- Headaches
- Irritability
- Fatigue
- Difficulty concentrating
10. Temporary Increase in Blood Pressure
Caffeine can cause a short-term rise in blood pressure, which may be important for individuals with hypertension or heart conditions.
☕ The Bottom Line
For most healthy adults, 1–3 cups of coffee each morning is considered safe—and often beneficial. Problems usually arise from excessive intake, caffeine sensitivity, or underlying health conditions.
Like most things in nutrition, coffee works best in moderation and when tailored to your body.