Coffee and tea
Learn about two popular drinks, their preparation, and how to think about caffeine.
Beverages: Antioxidants & Health Science
Explore the science, antioxidant profiles, and health benefits of teas, coffees, herbal infusions, and wholesome natural drinks.
FROM CURIOSITY TO EVERYDAY CHOICES
Choose drinks with the full picture in mind
Beverages can contribute fluid, caffeine, sugar, and other ingredients in very different amounts. Compare what is in the glass and how often you drink it instead of relying on broad labels such as “detox” or “energy”.
Explore all 2 guidesStart with hydration
Water is a simple default; needs vary with activity, climate, health, and life stage.
Check caffeine and sugar
Serving size and recipe can change caffeine and added sugar considerably.
Separate beverage from extract
A brewed drink and a concentrated ingredient supplement are not interchangeable.
Explore drinks by what is in the cup
Use these guides to compare familiar caffeinated drinks and broader advice on hydration.
Read the label
Compare caffeine, sugars, serving size, and added ingredients across packaged drinks.
Make a practical choice
Choose a drink that fits your routine, preferences, budget, and any personal medical advice.
Common questions about beverages
Yes. Tea and coffee contribute fluid, although caffeine sensitivity varies. Water remains a straightforward choice, and people with a condition that affects fluid intake should follow their clinician’s advice.
Source: NHS drinks and hydrationIt varies with the drink, serving size, bean or leaf, and brewing method. Check product information where available and count all caffeine sources, including energy drinks and some medicines. People who are pregnant should follow current local health guidance on caffeine limits.
Source: NHS guidance on caffeineNo. Juice can contain free sugars and usually has less fiber than whole fruit, while portion sizes are easy to drink quickly. Whole fruit is generally a more filling way to eat fruit; check local dietary guidance for juice portions.
Source: WHO healthy diet guidanceExplore all beverages guides
2 articles to explore at your own pace, with the newest published guides first.
Coffee Health Benefits: Chlorogenic Acid Science
Explore coffee's caffeine, chlorogenic acids and polyphenols, and learn what research says about coffee, focus, liver health and cardiovascular outcomes.
Chlorogenic Acid (CGA)Caffeine (1,3,7-trimethylxanthine)Caffeic Acid & Ferulic Acid
Green Tea: EGCG & L-Theanine
Explore green tea's EGCG, caffeine and L-theanine, and learn what research says about attention, brain function, cardiovascular health and antioxidant activity.
EGCG (Epigallocatechin-3-gallate)L-Theanine (non-protein amino acid)Caffeine (1,3,7-trimethylxanthine)