1. Insomnia: regular consumption of caffeine can interfere with sleep quality and quantity, leading to insomnia or poor sleep hygiene.
2. Headaches: Excessive caffeine intake can cause headaches. This is commonly referred to as a caffeine withdrawal headache.
3. Anxiety: Caffeine can cause an increase in anxiety levels due to the impact it has on the body's nervous system.
4. High blood pressure: Caffeine stimulates the body's sympathetic nervous system, which causes an increase in blood pressure.
5. Heart problems: High doses of caffeine can lead to an irregular heartbeat, heart palpitations, and in some cases, cardiac arrest.
6. Dehydration: Caffeine is a diuretic, meaning it increases urine output and can lead to dehydration.
7. Digestive issues: Caffeine can cause acid reflux, stomach ulcers, and other digestive issues.
8. Addiction: Caffeine can be addictive and lead to dependence, withdrawal symptoms, and cravings.
9. Impaired fertility: High doses of caffeine can impair fertility and affect the chances of conception.
10. Nervousness: Caffeine can cause nervousness, restlessness, and jitters, particularly in sensitive individuals.