Tea vs Coffee: Health Benefits Compared

A 240 ml cup of drip coffee contains 96 mg of caffeine, while a 240 ml cup of black tea contains 47 mg.

• 240 ml drip coffee = 96 mg caffeine; 240 ml black tea = 47 mg.
• Cold brew (240 ml) can contain as much as 200 mg; Starbucks Pike Place Grande (473 ml) = 310 mg.
• Population-average caffeine half-life ≈ 5.7 hours; about 48% remains after 6 hours.
• FDA recommends ≤ 400 mg/day for healthy adults; pregnancy guidance is ~200 mg/day.

Caffeine comparison: tea vs coffee

Coffee generally delivers more caffeine per serving than most teas, but preparation and serving size matter. The dataset below uses exact values from common beverages so you can compare like-for-like; serving volumes are those listed under each entry.

How long caffeine lasts: decay math and practical timing

Caffeine is metabolized with a population-average half-life of about 5.7 hours, so levels fall roughly to 69% after 3 hours, 48% after 6 hours, 33% after 9 hours and 23% after 12 hours of the original dose. Use this to time caffeine to avoid sleep disruption.

Practical example: a 4 pm drip coffee (96 mg) leaves ~46 mg in your system by 10 pm (6 hours later), which may still affect sleep in sensitive people.

Health benefits of tea

Antioxidants and L‑theanine

Tea—especially green, white and oolong—contains polyphenols (catechins, theaflavins) associated with modest cardiometabolic benefits in observational studies. Tea also provides L‑theanine, an amino acid that can reduce jitteriness and promote relaxed alertness when combined with caffeine.

Lower caffeine profile

Because a standard cup of tea has less caffeine than an equivalent cup of coffee (e.g., 47 mg black tea vs 96 mg drip), tea is a practical choice when you want milder stimulation or better late-day tolerance.

Health benefits of coffee

Large observational evidence

Coffee consumption is associated with lower risk of type 2 diabetes, Parkinson’s disease and some liver conditions in many cohort studies; the apparent benefits often appear at intakes of 2–4 cups/day. Evidence summaries and nutrient data are available from USDA FoodData Central and reviews cited by EFSA.

Higher caffeine and bioactives

Coffee contains more caffeine per typical serving and diverse bioactives (chlorogenic acids) that may contribute to metabolic effects. For people needing alertness or improved exercise performance, coffee often delivers stronger acute effects than tea.

Potential risks and safety

Recommended limits

The U.S. FDA recommends up to 400 mg/day of caffeine for healthy adults; many authorities advise ~200 mg/day during pregnancy (consult your clinician). The American Academy of Pediatrics discourages routine caffeine for adolescents because of sleep and behavioral effects.

Anxiety, heart rate, digestion

Caffeine can worsen anxiety, cause palpitations, and increase gastric acidity in sensitive people. High single doses (energy drinks, concentrated pills) raise overdose risk; seek immediate medical care for severe symptoms.

Withdrawal and dependence

Regular use produces dependence; withdrawal symptoms—headache, fatigue, low mood—typically begin 12–24 hours after stopping and peak at 20–51 hours. Gradual reduction eases symptoms.

Choosing between tea and coffee

Match the drink to your goals

If you need a strong, fast stimulant or are training for performance, coffee (or an espresso-based drink) is usually more effective. If you want steady alertness with less jitter and some calming L‑theanine, choose tea or matcha.

Practical tips and tracking

Watch serving size: specialty drinks (Starbucks Grande Pike Place, 473 ml = 310 mg) and cold brews can push you past daily limits. Track exact intake—apps like CoffeeLog can log beverages and compute cumulative mg so you don’t exceed recommended limits.

When to avoid or modify

Aim to stop caffeine at least 6–8 hours before planned sleep if you are sensitive; pregnant people should target ~200 mg/day or follow clinician guidance; adolescents should minimize intake per American Academy of Pediatrics advice.

Authoritative sources referenced: USDA FoodData Central for beverage nutrient values, U.S. Food and Drug Administration (FDA) guidance on safe daily intake, European Food Safety Authority (EFSA) reviews, and clinical guidance from Mayo Clinic and the American Academy of Pediatrics.