Drinks & Hydration
Water, caffeine and sugary drinks: what official guidance says.
What you drink adds up across a day, from water and milk to coffee, tea, juice and soda. Drinks can be an easy place to make small changes, and the official guidance is simpler than it often sounds.
This section covers how much fluid you need and how needs change with heat, activity and age; how much caffeine most adults can have and where it hides; and how to spot added sugars in drinks by reading the label. Each guide uses public guidance from the CDC, FDA, NIH and NHS and links the exact page behind every number.
Fluid and caffeine needs can be very different if you are pregnant, take certain medications, or have a heart, kidney or liver condition. If any of these apply to you, follow your clinician's advice over general guidance.
3 guides in Drinks & Hydration
Caffeine: How Much Is Too Much?
FDA cites 400 mg of caffeine a day as an amount not generally associated with negative effects for most adults. See what that means in cups, who needs less and the signs of too much.
Sugary Drinks: Spotting Added Sugar in What You Drink
Which drinks count as sugar-sweetened, what the 2025–2030 Dietary Guidelines say about them, and how to read Added Sugars on the label before you sip.
Hydration Basics: How Much Water Do You Need?
How much water you need depends on heat, activity, illness and life stage. See what NHS and CDC guidance says, signs of dehydration, and easy daily habits.