Why hydration needs change with age
Water is easy to overlook.
With coffee in the morning, fizzy drinks at lunch, and another caffeine boost in the afternoon, plain water often takes a back seat.
But health experts say hydration plays a far bigger role in daily wellbeing than many people realize. From brain function to temperature control, water supports nearly every system in the body.
According to research cited by the University of California, water helps deliver nutrients to cells, remove waste, protect joints and organs, and regulate body temperature. That’s why experts consistently recommend water as the default drink of choice.
While general guidelines suggest men aim for around 13 cups of fluids per day and women about nine, those figures don’t tell the full story. Age, growth, metabolism, and lifestyle all influence how much water the body actually needs.
Speaking to UK media, medical expert Dr Jonathan Webster explained how hydration requirements shift throughout life — and why many people may be falling short.
Teenagers and rapid growth
Teenagers have higher water needs due to growth spurts, hormonal changes, and increased physical activity.
For boys aged 14 to 18, the recommendation is 1.6 to 1.9 liters per day.
Girls in the same age group should aim for around 1.5 liters daily.
Adequate hydration helps maintain energy levels, supports muscle function, and aids metabolism during this critical stage of development.
Children aged 4 to 8
Young children need consistent hydration to support growth and development.
Dr Webster advises that children in this age range should drink around 1.2 liters of water per day, which equals roughly six to eight small glasses.
Hydration at this stage supports brain function, digestion, and temperature regulation. Because children may not always recognize thirst, regular reminders are important.
Adults under 60
Hydration becomes especially important in adulthood as work, exercise, and stress increase demands on the body.
Women under 60 are generally advised to drink around 1.6 liters per day, while men should aim for about 2 liters.
Dr Webster notes that proper hydration supports kidney function, concentration, and temperature control. However, individual needs may rise with exercise, hot climates, or diets high in salt or protein.
Adults over 60 and dehydration risk
Older adults are particularly vulnerable to dehydration.
As people age, the body’s thirst response becomes less sensitive, meaning they may not feel thirsty even when fluid levels are low.
Experts recommend adults over 60 continue to aim for 1.6 to 2 liters per day, unless otherwise advised by a healthcare professional.
The Mayo Clinic warns that common signs of dehydration include dark urine, reduced urination, fatigue, dizziness, confusion, and dry skin that doesn’t bounce back when pinched.
Factors that affect individual needs
Water requirements aren’t fixed. Exercise, illness, medication, alcohol intake, and even diet all influence hydration levels.
Foods with high water content — such as fruits, vegetables, and soups — contribute to fluid intake. At the same time, caffeine and alcohol can increase fluid loss if consumed in excess.
Listening to the body and maintaining regular water intake throughout the day is often more effective than relying on thirst alone.
Making water a daily habit
Health experts suggest keeping water easily accessible, pairing drinking water with daily routines, and choosing water over sugary drinks whenever possible.
Small changes can make a noticeable difference in energy, focus, and overall wellbeing.
While exact needs vary, staying consistently hydrated is one of the simplest steps people can take to support long-term health.
Health Disclaimer
This article is for informational purposes only and is not intended as medical advice. Always consult a qualified healthcare professional before making any changes to your health, diet, or treatment.
Featured Image Credit: Getty Stock Images
Topics: Food and Drink, Health, Life
