Staying Hydrated as You Age: Why Thirst Signals Change
The sense of thirst can become less reliable with age. Learn practical ways to drink enough fluids throughout the day and the signs of dehydration to watch for.
The short version
- Older adults may not feel thirsty even when their bodies need fluids.
- Spreading drinks through the day and eating water-rich foods both help.
- Ask your doctor about fluid goals if you have heart or kidney conditions or take diuretics.
In this guide
Drinking enough fluids sounds simple, yet it is something many older adults find surprisingly easy to overlook. One reason is that the body's thirst signal can become less sensitive with age, so you may not feel thirsty even when your body could use more water.
Certain medications, such as some diuretics and blood pressure medicines, can also increase fluid loss. Hot weather, illness with fever, vomiting or diarrhea can raise the risk of dehydration further.
How much should you drink?
There is no single number that fits everyone. Fluid needs depend on your size, activity level, the weather and your health. People with certain heart or kidney conditions may be advised to limit fluids, so it is important to ask your doctor what is right for you.
For most people, a practical approach is to drink regularly throughout the day rather than waiting until you feel thirsty, and to drink more when it is hot or when you are active.
Signs of dehydration to watch for
- Dark yellow urine or urinating less often than usual
- Dry mouth or lips
- Headache
- Feeling tired, weak or dizzy
- Muscle cramps
- Confusion, which is a reason to seek medical help promptly
Severe dehydration can be serious. If you or someone you care for is confused, very dizzy, unable to keep fluids down or has not urinated in many hours, contact a doctor or seek urgent care.
Practical ways to drink more
Keep water in sight. Fill a reusable bottle or pitcher in the morning and keep it where you spend most of your time. Seeing it is a reminder.
Link drinks to routines. Have a glass of water when you wake up, with each meal, when you take medications and when you return from a walk.
Use reminders. A phone alarm, a kitchen timer or a simple chart on the refrigerator can help.
Try different temperatures and flavors. Some people prefer room-temperature water. Others like it cold with a slice of lemon, cucumber or a few berries. Herbal teas count too.
Choose water-rich foods. Soups, fruits such as watermelon, oranges and grapes, and vegetables such as cucumber, lettuce and tomatoes all contribute to your fluid intake.
Sip, do not gulp. If drinking a full glass at once feels uncomfortable, take smaller sips more often.
What counts toward fluids?
Water is the best everyday choice. Milk, unsweetened tea and coffee in moderation, and broths also count. Be mindful of drinks with a lot of added sugar, such as regular soda and many juice drinks. Alcohol can increase fluid loss, so it does not help with hydration.
A note about nighttime bathroom trips
Some people limit fluids because they worry about getting up at night. A helpful compromise is to drink most of your fluids earlier in the day and taper off in the two hours before bed. Make sure the path to the bathroom is well lit to reduce the risk of falls.
For caregivers
If you care for an older relative, offer drinks regularly, especially during hot weather or illness. People with memory changes may forget to drink, so placing a cup within reach and offering it every hour or so can help. Pay attention to signs such as unusual sleepiness or confusion and contact their doctor with any concerns.
