Open evidence registry
Hydration evidence explorer
Inspect the claim, intended scope, calculator use, safety boundary, and named original sources behind the site.
Quick answer
WaterDailyGoal separates population reference values, peer-reviewed measurement guidance, safety boundaries, and transparent site formula choices. Each record shows what a claim supports and where it should not be stretched into diagnosis or treatment.
Showing 16 of 16 evidence records
Adult reference intakes
NAM and EFSA adequate-intake values describe total water from drinks plus food, not a prescription for every individual day.
- Scope
- Healthy adults in temperate conditions; sex-specific reference values are population-level anchors.
- Used by
- Used as a sanity check so the formula lands near major public-health reference ranges for typical adults.
Named sources
Weight-scaled baseline
WaterDailyGoal uses 33 ml/kg as a transparent operating midpoint, then adjusts for activity, climate, life stage, and GLP-1 settings.
- Scope
- General wellness estimate for adults; the 33 ml/kg value is a site formula choice, not a diagnostic rule.
- Used by
- Forms the daily drinking-goal baseline before activity, climate, and safety checks are applied.
- Safety note
- Medical fluid restrictions, kidney/heart/liver disease, and clinician instructions override the calculator.
Named sources
Food water accounting
The calculator separates drinking water from total water because food and other beverages can contribute meaningfully to total intake.
- Scope
- Everyday mixed diets; food-water share varies by diet, climate, appetite, and illness.
- Used by
- Keeps the headline result actionable as a drinking target while methodology explains total-water context.
Named sources
Heat and activity
Water needs rise with heat, humidity, physical activity, sweat, clothing, and illness, so flat glass-count advice is weak.
- Scope
- General wellness planning; heat illness symptoms require cooling and escalation, not only more drinking.
- Used by
- Supports the climate multiplier, activity add-ons, heat tools, and conservative heat-safety wording.
- Safety note
- Confusion, fainting, chest pain, stopped sweating with heat symptoms, or worsening symptoms need urgent action.
Named sources
Sweat-rate measurement
Sweat rate varies widely, so pre/post body-weight checks are a practical way to individualize training and heat plans.
- Scope
- Exercise, sport, and hot-shift planning; repeat measurements are better than one-off guesses.
- Used by
- Supports the sweat-rate calculator, marathon page, electrolyte calculator, and heat-shift planner.
Named sources
Electrolyte context
Electrolytes are most relevant when sweat losses are long, hot, heavy, repeated, or paired with low food intake.
- Scope
- Sports and heat-work planning; sodium/potassium restrictions and blood-pressure concerns need clinician guidance.
- Used by
- Drives electrolyte decision-tree cues and sodium-loss wording without making electrolyte products a default.
- Safety note
- Electrolyte drinks should not be used to justify forced over-drinking.
Named sources
Pregnancy and breastfeeding
Pregnancy and breastfeeding can raise fluid needs, but individual medical guidance comes first.
- Scope
- General pregnancy and lactation wellness pages; not a replacement for prenatal or postpartum care.
- Used by
- Sets conservative beverage floors and clinician-first copy on pregnancy and breastfeeding surfaces.
- Safety note
- Symptoms, high-risk pregnancy, vomiting, swelling, or medical restrictions should be handled with a clinician.
Named sources
GLP-1 medication support
GLP-1 medication labels and patient information warn that nausea, vomiting, diarrhea, and low appetite can raise dehydration concerns.
- Scope
- Medication-adjacent wellness support; the site does not advise dose changes or treatment decisions.
- Used by
- Supports the GLP-1 toggle, GLP-1 calculator flow, gentle sip routine, and clinician-warning copy.
- Safety note
- Persistent vomiting, diarrhea, kidney symptoms, or inability to drink should be discussed with a healthcare provider.
Named sources
What counts as water
Moderate coffee, tea, milk, and many water-rich drinks can contribute to fluid intake, while caffeine, sugar, and stimulants still matter.
- Scope
- General drink-counting guidance for healthy adults; sensitive groups should follow product and clinician guidance.
- Used by
- Supports the drink-counting hub, beverage hydration index tool, and source-backed drink verdict pages.
Named sources
Older-adult hydration routines
Older adults may need more deliberate hydration prompts because thirst can be less reliable and heat or illness can raise risk faster.
- Scope
- General wellness routines for older adults; clinician-set fluid limits override any habit target.
- Used by
- Supports the older-adult calculator, age guide, heat-wave checklist, and caregiver-friendly pacing copy.
- Safety note
- Heart, kidney, liver, sodium, and fluid-restriction instructions should be set by a clinician.
Named sources
Caffeine and stimulant boundaries
Caffeinated drinks can count toward fluid intake in moderation, but caffeine dose, sugar, stimulants, sleep, and blood-pressure sensitivity still matter.
- Scope
- Healthy-adult drink counting; children, pregnancy, heart rhythm concerns, anxiety, and medication contexts need extra caution.
- Used by
- Supports coffee, tea, soda, energy-drink, and drink-index verdicts without presenting all drinks as equivalent to water.
Named sources
Overdrinking and pacing
Forcing large volumes of plain water, especially during long endurance or hot-work contexts, can be unsafe; pacing and sodium context matter.
- Scope
- General wellness and sport planning; symptoms of hyponatremia, heat illness, or worsening confusion require urgent escalation.
- Used by
- Supports high-goal warnings, hourly pacing copy, marathon guidance, electrolyte decision prompts, and the 'too much water' safety guide.
- Safety note
- The site avoids recommending more than about 1 litre per hour and treats very high goals as a caution flag.
Named sources
Workplace heat planning
Hydration plans for heat work should be paired with shade, cooling, breaks, workload changes, and escalation steps instead of relying on water alone.
- Scope
- Construction, warehouse, delivery, school, coaching, and outdoor-work guidance; it does not replace an employer heat-safety policy.
- Used by
- Supports the heat-shift planner, workplace toolkit, supervisor printables, and heat-wave checklist.
- Safety note
- Heat illness symptoms should trigger cooling and workplace or emergency procedures, not only extra fluids.
Named sources
Heat illness escalation
Heat illness warning signs can overlap with dehydration, but confusion, fainting, severe weakness, seizures, or worsening symptoms require cooling and urgent escalation.
- Scope
- Heat-wave, outdoor-work, warehouse, delivery, coach, teacher, sauna, and exercise-in-heat guidance; not a diagnostic checklist.
- Used by
- Keeps heat tools and guides from framing every symptom as a drink-more-water problem.
- Safety note
- Escalation and cooling come before hydration math when symptoms are severe or worsening.
Named sources
Kidney-stone hydration context
Fluid intake is commonly part of kidney-stone prevention guidance, but stone type, diet, medications, and clinician instructions change the right plan.
- Scope
- General educational context for kidney-stone and dark-urine pages; not diagnosis, treatment, or a substitute for stone-specific care.
- Used by
- Supports cautious kidney-stone and dark-urine copy without turning the water calculator into a treatment plan.
- Safety note
- Pain, fever, vomiting, blood in urine, or known kidney disease should be handled with medical care.
Named sources
UTI and urinary symptom boundaries
Hydration can support urinary health, but UTI-like symptoms require medical judgment and should not be treated as a hydration-only issue.
- Scope
- General wellness guidance for UTI, urine-color, and dark-urine pages; not antibiotic advice or self-diagnosis.
- Used by
- Supports clinician-first warnings on urinary symptom pages and helps avoid overpromising water as a cure.
- Safety note
- Fever, chills, side or back pain, nausea, vomiting, blood in urine, pregnancy, or recurrent symptoms need prompt care.