Health risks of drinking 15–20 cups of tea or coffee daily

Immediate effects

Drinking 15–20 cups of tea or coffee daily can cause jitteriness, anxiety, insomnia, nausea, and increased heart rate and blood pressure.

Nutrient deficiency risk

Excess caffeine interferes with iron absorption, raising the chance of anemia and other nutrient deficiencies.

Long-term heart strain

Persistent high caffeine intake strains the cardiovascular system by elevating heart rate and blood pressure over time.

Sleep disruption

Excess caffeine disrupts sleep, which negatively impacts mood, immunity, and mental health in the long run.

Caffeine dependence

Heavy caffeine use can lead to physical dependence, causing withdrawal symptoms like headaches, irritability, and fatigue.

Combined risks with smoking & alcohol

Mixing caffeine with smoking and alcohol amplifies damage to the heart, liver, and nervous system, worsens anxiety, and disrupts sleep further.

Vulnerable groups