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Written by the people who make WOOMOOL

Hydration Guides

Practical, no-nonsense guides on how much water to drink, building a drinking habit, and picking the right water reminder app — with sources, not vibes.

The basics

5
  1. Basics3 min read

    How Much Water Should You Drink a Day?

    Work out your daily water intake by weight with a simple formula (30–35 ml per kg), see what changes it, and get a personal target in seconds.

  2. Basics4 min read

    Can You Actually Drink Too Much Water?

    Can you drink too much water? Yes, but rarely — the risk is speed, not total. Your kidneys clear about a liter an hour. Here are the signs, plainly.

  3. Bottled water4 min read

    Microplastics in Bottled Water: How Worried Should You Be?

    A 2024 study counted ~240,000 plastic particles per liter. What microplastics in bottled water mean for your health — honestly unknown — and what to change.

  4. Shelf life5 min read

    Does Water Go Bad? What the Date on the Bottle Really Means

    Does water expire? Plain water barely spoils — the date is about the bottle and taste. The real risk is a sipped bottle left warm, plus rotating stored water.

  5. Fact check5 min read

    10 Water Myths, Fact-Checked Honestly

    Ten water myths debunked honestly: the 8-glasses rule, coffee counting, cold-water fears, clear-urine goals. Quick verdicts here, full evidence one click away.

Timing

2
  1. Timing3 min read

    The Best Time to Drink Water — A Realistic Daily Schedule

    From the first glass after waking to the half glass before bed — a realistic daily water schedule, plus the truth about drinking water with meals.

  2. Morning3 min read

    Drinking Water in the Morning: What It Actually Does

    What drinking water in the morning on an empty stomach really does: overnight fluid loss, warm vs. cold, lemon water — the honest version.

Habits & tools

5
  1. Compared3 min read

    The Best Drink Water Reminder Apps in 2026

    We compared the best drink water reminder apps for iPhone — from cute water trackers like WOOMOOL and Waterllama to data-heavy tools — so you can pick one that sticks.

  2. Habits2 min read

    How to Remember to Drink Water (Without Hating It)

    Forgetting to drink water all day? Seven practical, ADHD-friendly ways to remember to drink water — habit stacking, visual cues, and reminders that adapt to you.

  3. Hygiene5 min read

    It’s Just Water — So Why Wash the Bottle?

    How often to wash your water bottle, and how? The moment you sip, culturing starts. A part-by-part schedule, vinegar and baking-soda tips, and what to do about mold — no hype.

  4. Taste4 min read

    How to Make Water Taste Better When Plain Water Bores You

    Disliking water is usually a variables problem, not a taste one. How to make water taste better by fixing temperature, chlorine, and your cup, problem by problem.

  5. Gear4 min read

    How to Choose a Water Bottle You’ll Still Use in March

    How to choose a water bottle without brand hype — capacity as division of your daily goal, cleanability as the lifespan test, and honest material trade-offs.

Drinks & water itself

13
  1. Science2 min read

    Does Coffee Count as Water Intake?

    Short answer: mostly yes. What the research says about coffee, tea, and caffeine as hydration — plus which drinks count toward your daily water intake.

  2. Drinks2 min read

    Does Sparkling Water Count as Water?

    Yes — plain sparkling water hydrates exactly like still water, and research confirms it. What counts, what to watch (sugar, teeth, fullness), and how to use the fizz.

  3. Drinks3 min read

    Is Tea Hydrating? What the Studies Actually Show

    Does tea count as water intake? Yes — trials show even black tea hydrates like water. Where green, black, herbal, and barley tea land, plus the caffeine math.

  4. Milk4 min read

    Is Milk Hydrating? Yes — It Actually Outlasted Water

    Is milk hydrating? In a 13-drink trial, milk held fluid longer than water itself. The why (electrolytes, protein, fat), the catch (calories, lactose), and where milk fits.

  5. Drinks4 min read

    Sports Drinks vs Water: Do You Actually Need the Electrolytes?

    Sports drinks vs water, honestly: water covers daily life and sub-hour workouts. Electrolytes matter in long sweat and heat; for stomach bugs, ORS wins.

  6. Lemon3 min read

    Lemon Water Is Not a Detox — Here Is What It Actually Does

    An honest look at lemon water benefits: detox, alkalizing, and fat-burning do not hold up — but flavor, a zero-sugar swap, and a little vitamin C are real.

  7. Drinks4 min read

    Alkaline Water: Does It Actually Do Anything?

    Is alkaline water good for you? Your stomach acid resets its pH within minutes, and the evidence for alkaline, hydrogen, and ionized water is thin.

  8. Drinks4 min read

    Tap Water vs Bottled Water: An Honest Comparison

    Tap water vs bottled water, honestly compared: who regulates each, why tap tastes off (chlorine — fixable), the lopsided cost math, and the real exceptions.

  9. Minerals4 min read

    Hard Water vs Soft Water: What Actually Changes?

    Hard water vs soft water comes down to one number: hardness in mg/L. The WHO bands, what changes for taste, tea, hair, and skin — and why both are safe to drink.

  10. Temperature4 min read

    Is Cold Water Actually Bad for You?

    Is cold water bad for you? Mostly no — the digestion and fat-hardening myths have no evidence. Who should actually care, and the best temperature by situation.

  11. Food4 min read

    Hydrating Foods: The 20% of Your Water You Eat

    Hydrating foods ranked with USDA numbers — cucumber 95%, tomato 94%, watermelon 91% — and why about 20% of your daily water arrives on a plate.

  12. Drinks3 min read

    Barley Tea: The Caffeine-Free "Water With Flavor"

    Barley tea has zero caffeine and virtually zero calories — it counts toward your daily water exactly like plain water. The diuretic myth, summer iced barley tea, fasting, and kids, honestly sorted.

  13. Temperature3 min read

    Warm Water Benefits: What’s Real, What’s Just Cozy?

    Claims that warm water boosts digestion and burns fat mostly crumble under evidence. But there are honest reasons to drink it anyway — plus how to make sayu and why 65°C is the line you shouldn’t cross.

Body signals

11
  1. Weight loss2 min read

    Does Drinking Water Help You Lose Weight?

    What drinking water can and cannot do for weight loss: pre-meal water, swapping sugary drinks, thirst-hunger confusion — and the honest limits.

  2. Body3 min read

    Water Retention: Should You Drink More Water or Less?

    It sounds backwards, but under-drinking makes your body hold water. Why drinking water helps water retention, the real causes of puffiness, and a checklist.

  3. Body4 min read

    The Quiet Signs You’re Running a Little Dry

    The quiet signs of dehydration in adults — afternoon headaches, fatigue, dark urine, constipation — and a self-check table with what to rule out first.

  4. Body signals4 min read

    What Your Urine Color Says About Your Hydration

    A practical urine color hydration chart: pale straw is the target, dark morning urine is normal, B vitamins fake the reading, and when to see a doctor.

  5. Headache4 min read

    The Headache Water Can Fix — and How to Spot It

    A dehydration headache usually eases within 30 minutes to 3 hours after drinking water. How to tell it apart from caffeine withdrawal — and the ER red flags.

  6. Digestion4 min read

    Does Drinking More Water Help Constipation?

    Water for constipation relief is weaker alone than it sounds — the evidence is for fiber plus water. The trial behind the pair, a morning routine, red flags.

  7. Skin3 min read

    Does Drinking Water Actually Improve Your Skin?

    Drinking water skin benefits are real — if you were under-hydrated. What studies measured, why moisturizer does a different job, and a two-week self-test.

  8. Body5 min read

    Thirst vs Hunger: How to Tell the Difference

    Thirst vs hunger: why they feel alike, a ten-minute water test to tell them apart, what real hunger looks like, and how it ties into dieting and fasting.

  9. Eyes4 min read

    Dry Eyes and Dehydration: What Water Can and Can’t Fix

    Dry eyes and dehydration are linked in research — but weakly. Screens, AC, and contact lenses matter more. What water can and can’t fix, plus a desk checklist.

  10. Digestion5 min read

    Does Water Help Digestion? What It Actually Does

    Does water help digestion? What water really does, from saliva to stomach acid to reabsorption in your gut — plus the truth about drinking water with meals.

  11. Your cycle4 min read

    Water and Your Period: Bloating, Cramps, and the Honest Answer

    Period bloating? Drinking less water backfires — the bloat is hormonal. What a small study says about water and cramps, and the real levers: salt and caffeine.

Situations

10
  1. Hangover4 min read

    Does Water Actually Help a Hangover?

    Alcohol is a real diuretic, unlike coffee, so hangover water is 80% prevention, not a cure. Water between drinks, a big glass before bed, and small sips next morning.

  2. Sick days4 min read

    Drinking Water When You’re Sick: What “Plenty of Fluids” Really Buys You

    Drinking water when sick, honestly — forcing fluids has no trial evidence; preventing dehydration is real. What to drink for fever, sore throat, stomach bugs.

  3. Kids4 min read

    How Much Water Should Kids Drink? An Age-by-Age Reality Check

    How much water should kids drink each day? AAP-based amounts by age, where milk and juice fit, and honest tactics for kids who simply forget to drink.

  4. Caregiving4 min read

    Why Older Adults Stop Feeling Thirsty — and How to Help Them Drink

    Thirst fades with age just as the body’s water reserve shrinks. A caregiver’s guide to elderly dehydration prevention — time anchors, cup placement, red flags.

  5. Pregnancy4 min read

    How Much Water Do You Need During Pregnancy?

    Pregnancy water intake, verified: ACOG says 8–12 cups a day, EFSA adds +300 ml (+700 ml nursing). Plus morning-sickness sip tactics and the swelling myth.

  6. Summer4 min read

    How Much More Water Do You Need in Summer?

    Honest summer hydration tips: how much sweat actually costs you, the early signs of heat exhaustion, and when salt starts to matter — around the one-hour mark.

  7. Winter5 min read

    Water in Winter: The Season Thirst Goes Quiet

    Winter dehydration has three causes: blunted thirst, dry heated air, and water lost on every breath. A summer-vs-winter comparison, warm-drink swaps, and the workout illusion.

  8. Fasting4 min read

    Can You Drink Water While Fasting? (You Should Drink More)

    Yes — drink water during intermittent fasting. You actually need more: the ~20% of fluid from food disappears. Coffee, tea, and diet soda, honestly sorted.

  9. Exercise4 min read

    Water and Exercise: Before, During, After — in Three Beats

    How much water before a workout, during, and after? A three-beat guide: what the evidence supports, soft ranges for the rest, and when plain water is enough.

  10. Medication4 min read

    Why Every Label Says “Take With a Full Glass of Water”

    How much water to take with pills? A full glass — dry-swallowed pills can stick to your esophagus. Why coffee, milk, grapefruit, and alcohol make poor chasers.