How to Prevent, Detect, & Treat Dehydration in Aging Adults
Q: How can we get my older mother to drink more water? She is susceptible to urinary tract infections and seems to be often dehydrated no matter what we do. We were also wondering if coffee and tea are okay, or should they be avoided to reduce dehydration? A: Dehydration is indeed an important problem for […]

preventing dehydration in elderlyQ: How can we get my older mother to drink more water? She is susceptible to urinary tract infections and seems to be often dehydrated no matter what we do. We were also wondering if coffee and tea are okay, or should they be avoided to reduce dehydration?

A: Dehydration is indeed an important problem for older adults. It can be common even when it’s not hot outside.

Helping an older person increase her fluid intake, as you’re trying to do, is one of the best ways to reduce the risk of dehydration.

Now how to actually do this? Studies — and practical experience — suggest that the best approaches include:

  1. Frequently offering the older person a drink, preferably on a schedule,
  2. Offering beverages the person seems to prefer,
  3. Not expecting older adults to drink a large quantity at a single sitting,
  4. Addressing any continence issues that might be making the person reluctant to drink often.

But your question brings up other issues in my mind. Has frequent dehydration been confirmed? (Dehydration can be hard to correctly diagnose.) Have you been able to measure how much your mother drinks, and how does this amount compare to the recommended daily fluid intake for older adults?

Also, is the real goal to prevent or manage frequent urinary infections, and is increasing her hydration likely to achieve this?

So let’s review the basics of dehydration in older adults, and what’s known about helping older adults stay hydrated. I will then share some additional tips on helping your mother maintain hydration.

The Basics of Dehydration

What is dehydration and what causes it?

Dehydration means the body doesn’t have as much fluid within the cells and blood vessels as it should.

Normally, the body constantly gains fluid through what we eat and drink, and loses fluid through urination, sweating, and other bodily functions. But if we keep losing more fluid than we take in, we can become dehydrated.

If a person starts to become dehydrated, the body is designed to signal thirst to the brain. The kidneys are also supposed to start concentrating the urine, so that less water is lost that way.

Why are older adults at higher risk for dehydration?

Unfortunately, the body’s mechanisms meant to protect us from dehydration work less well as we age. Older adults have reduced thirst signals and also become less able to concentrate their urine.

Other factors that put older adults at risk include:

  • Chronic problems with urinary continence, which can make older adults reluctant to drink a lot of fluids
  • Memory problems, which can cause older adults to forget to drink often, or forget to ask others for something to drink
  • Mobility problems, which can make it harder for older adults to get something to drink
  • Living in nursing homes, because access to fluids often depends on the availability and attentiveness of staff
  • Swallowing difficulties

Dehydration can also be brought on by an acute illness or other event. Vomiting, diarrhea, fever, and infection are all problems that can cause people to lose a lot of fluid and become dehydrated. And of course, hot weather always increases the risk of dehydration.

Last but not least, older adults are more likely to be taking medications that increase the risk of dehydration, such as diuretic medications, which are often prescribed to treat high blood pressure or heart failure.

A UK study of older adults in residential care found that 46% had impending or current dehydration, as diagnosed by blood tests.

How is dehydration diagnosed?

For frail older adults, a simple preliminary check, if you’re concerned about dehydration, is to get the older person to drink some fluids and see if they perk up or improve noticeably. (This often happens within 5-10 minutes.)

This is not a clinically-proven method, but it’s easy to try. If drinking some fluids does noticeably improve things, that does suggest that the older person was mildly dehydrated.

For a truly accurate diagnosis in older adults, the most accurate way to diagnose dehydration is through laboratory testing of the blood. Dehydration generally causes abnormal laboratory results such as:

  • Elevated plasma serum osmolality: this measurement relates to how concentrated certain particles are in the blood plasma
  • Elevated creatinine and blood urea nitrogen: these tests relate to kidney function
  • Electrolyte imbalances, such as abnormal levels of blood sodium
  • Low urine sodium concentration (unless the person is on diuretics)

(Doctors often sub-classify dehydration based on whether blood sodium levels are high, normal, or low.)

Dehydration can also cause increased concentration of the urine — this is measured as the “specific gravity” on a dipstick urine test. However, this is not an accurate way to test for dehydration in older adults, since we tend to lose the ability to concentrate urine as we get older. This was confirmed by a 2016 study, which found that the diagnostic accuracy of urine dehydration tests in older adults is “too low to be useful.

There are also a number of physical symptoms associated with dehydration. However, a 2015 study of older adults found that the presence or absence of dehydration symptoms is not an accurate way to diagnose dehydration.

Physical signs of dehydration may include:

  • dry mouth and/or dry skin in the armpit
  • high heartrate (usually over 100 beats per minute)
  • low systolic blood pressure
  • dizziness
  • weakness
  • delirium (new or worse-than-usual confusion)
  • sunken eyes
  • less frequent urination
  • dark-colored urine

But as noted above: the presence or absence of these physical signs are not reliable ways to detect dehydration. Furthermore, the physical symptoms above can easily be caused by health problems other than dehydration.

This study published in 2019 confirmed that commonly used symptoms do not accurately detect dehydration in frail older adults: Signs and Symptoms of Low-Intake Dehydration Do Not Work in Older Care Home Residents—DRIE Diagnostic Accuracy Study.

So if you are concerned about clinically significant dehydration — or about the symptoms above — blood tests results may be needed. A medical evaluation for possible dehydration should also include an interview and a physical examination.

What are the consequences of dehydration?

The consequences depend on how severe the dehydration is, and perhaps also on how long the dehydration has been going on.

In the short-term, dehydration can cause the physical symptoms listed above. Especially in older adults, weakness and dizziness can provoke falls. And in people with Alzheimer’s or other forms of dementia, even mild dehydration can cause noticeable worsening in confusion or thinking skills.

Dehydration also often causes the kidneys to work less well, and in severe cases may even cause acute kidney failure.

The consequences of frequent mild dehydration — meaning dehydration that would show up as abnormal laboratory tests but otherwise doesn’t cause obvious symptoms — are less clear.

Chronic mild dehydration can make constipation worse. Otherwise, a 2012 review found that the only health problem that has been consistently associated with low daily water intake is kidney stones.

A 2013 review on fluid intake and urinary system diseases concluded that it’s plausible that dehydration increases the risk of urinary tract infections, but not definitely proven.

A 2020 review on the effect of increasing fluid intake to prevent UTIs also noted that “Patients with UTI are often advised by clinicians to keep adequately hydrated or drink more fluids. However, the evidence base for this recommendation remains unclear.”

Speaking of urinary tract infections (UTIs), if you are concerned about frequent bacteria in the urine, you should make sure this reflects real UTIs and not simply a sign of the older person’s bladder being colonized with bacteria.

This is a very common condition known as asymptomatic bacteriuria, and incorrectly diagnosing this as a UTI can lead to pointless overtreatment with antibiotics. (More on this issue below, or see Q&A: Why Urine Bacteria Doesn’t Mean a UTI Needs Antibiotics.)

How is dehydration treated?

The treatment of dehydration depends on:

  • Whether the dehydration appears to be mild, moderate, or severe
  • What type of electrolyte imbalances (such as high/low levels of sodium and potassium) appear on laboratory testing
  • If known, the cause of the dehydration

Mild dehydration can usually be treated by having the person take more fluids by mouth. Generally, it’s best to have the person drink something with some electrolytes, such as a commercial rehydration solution, a sports drink, juice, or even bouillon. But in most cases, even drinking water or tea will help.

Mildly dehydrated older adults will often perk up noticeably after they drink some fluids, usually within 5-10 minutes.

Moderate dehydration is often treated with intravenous hydration in urgent care, the emergency room, or even the hospital. Some nursing homes can also treat dehydration with a subcutaneous infusion, which means providing fluid through a small IV needle placed into the skin of the belly or thigh. This is called hypodermoclysis, and this is actually safer and more comfortable for older adults than traditional IV hydration.

Severe dehydration may require additional intervention to support the kidneys, and sometimes even requires short-term dialysis.

How to prevent dehydration in older adults?

Experts generally recommend that older adults consume at least 1.7 liters of fluid per 24 hours. This corresponds to 57.5 fluid ounces, or 7.1 cups.

What are the best fluids to prevent dehydration?

I was unable to find research or guidelines clarifying which fluids are best to drink. This is probably because clinical research hasn’t compared different fluids to each other.

As to whether certain fluids are dehydrating: probably the main fluid to be concerned about in this respect is alcohol, which exerts a definite diuretic effect on people.

The effect of caffeine on causing people to lose excess water is debatable. Technically caffeine is a weak diuretic. But real-world studies suggest that people who are used to drinking coffee don’t experience much diuretic effect.

Now, caffeine may worsen overactive bladder symptoms, so there may be other reasons to be careful about fluids containing caffeine. But as best I can tell, coffee and tea are not proven to be particularly dehydrating in people who drink them regularly.

The safest approach would still be to drink decaffeinated drinks. But if an older person particularly loves her morning cup of (caffeinated) coffee, I’d say to consider accommodating her if at all possible.

How to help older adults to stay hydrated?

A 2015 review of nursing home interventions intended to reduce dehydration risk concluded that “the efficacy of many strategies remains unproven.” Still, here are some approaches that are reasonable to try:

  • Offer fluids often throughout the day; consider doing so on a schedule.
  • Offer smaller quantities of fluid more often; older adults may be reluctant to drink larger quantities less often.
  • Be sure to provide a beverage that is appealing to the older person.
  • See if the older person seems to prefer drinking through a straw.
  • Supplement fluids with water-rich fruit (e.g. watermelon) or other foods with high water content.
  • Identify any continence concerns that may be making the older person reluctant to drink. Keeping a log of urination and incontinence episodes can help.
  • Consider a timed toileting approach, which means helping the older person get to the bathroom on a regular schedule. This can be very helpful for people with memory problems or mobility difficulties.
  • Track your efforts in a journal. You’ll want to track how much the person is drinking; be sure to note when you try something new to improve fluid intake.
  • Offer extra fluids when it’s hot, or when the person is ill.

Practical tips for family caregivers

Let’s now return to the issues brought up in the question.

Family caregivers are often concerned about whether an older person is drinking enough. Since dehydration is indeed very common among older adults, this concern if very important.

However, before expending a lot of energy trying to get your mother to drink more, I would encourage you to consider these four suggestions:

1.Measure how much your mother is actually drinking most days.

This can require a little extra effort. But it’s very helpful to get at least an estimate of how much the person drinks. This can confirm a family’s — or doctor’s — hunch that the person isn’t taking in enough fluid, and can help the care team figure out how much more fluid is required.

Again, the recommendation for older adults is to consume at least 1.7 liters/day, which corresponds to at least 57.5 fluid ounces. In the US, where a measuring cup = 8 ounces, this is equivalent to 7.1 cups/day.

Keep a journal to record how much fluid your older parent is drinking. It’s generally important to track anything you want to improve.

2. Confirm that your mother is, in fact, often dehydrated.

As noted above in the section on diagnosing dehydration: physical symptoms and urine tests are not enough to either diagnose dehydration or rule it out.

Instead, consider these two approaches to confirming clinical dehydration. One is to see if her energy and mental state perk up when she drinks more. The other is to talk to the doctor and request blood tests to confirm dehydration.

Now, you don’t necessarily want to request blood tests every time you suspect mild dehydration. But especially if your mother’s dehydration has never been confirmed by a serum osmolality test, it would probably be useful to do this at least once.

3. If frequent urinary tract infections (UTIs) are a concern, learn about asymptomatic bacteriuria and try to determine whether these are real UTIs versus a colonized bladder.

Sometimes I’ve seen families hellbent on increasing hydration or taking other measures, because they are concerned about repeated or persisting urinary tract infections (UTIs).

But UTIs are a bit like dehydration. A UTI is a common problem in older adults and is potentially very serious. But it’s also easily misdiagnosed, even by professionals.

Sometimes, when an older person keeps being diagnosed with a UTI repeatedly, the problem is actually that the older person has asymptomatic bacteriuria. This is a very common condition in which an older person’s bladder becomes colonized with bacteria. It probably happens because people’s immune systems get weaker as they age.

So how is this different from a UTI? Both conditions will cause a positive urine culture, meaning that bacteria is in the urine. The main difference is that in asymptomatic bacteriuria, the older person doesn’t experience pain, inflammation, increased confusion, or other symptoms of infection.

In a young person, bacteria in the urine is very uncommon and almost always corresponds to a clinically significant infection. But in an older person, bacteria in the urine is common.

So you cannot diagnose a UTI in an older person just on the basis of a positive urine culture. Instead, the family and clinician must note other signs of infection, such as pain or delirium.

Families are often surprised to learn that clinical trials have repeatedly found that it is not helpful to treat asymptomatic bacteriuria, but it’s true. In fact, a 2015 study found that treating asymptomatic bacteriuria with antibiotics increased the likelihood of later having a real UTI, and that the real UTI was more likely to be antibiotic-resistant.

For more on this topic, see Q&A: Why Urine Bacteria Doesn’t Mean a UTI Needs Antibiotics.

4. Pay attention to figure out which fluids your mother prefers to drink and try scheduling frequent small drinks.

Ultimately, there’s no substitute for paying close attention, keeping track of your observations, and doing some trial and error to figure out what seems to improve things.

No doctor has a magic formula to get an older person to drink more. So identify the drinks your mother prefers, start tracking how much she drinks, and then start experimenting to figure out what works.

Usually, a combination of the following three approaches will improve fluid intake:

  • Offer a beverage the person likes,
  • Offer small-to-moderate quantities of the beverage on schedule,
  • Address continence issues.

You can also increase fluid intake by offering foods that contain a lot of water, such as watermelon, or perhaps soups.

Do you have any additional questions regarding the prevention of dehydration in older adults?

Post them below and I’ll see how I can help.

This article was reviewed and update in June 2020.


What does it mean to age gracefully ? You can’t stand in a checkout line without seeing at least a few magazine headlines about how to look younger. While dreading some wrinkles and sagging isn’t uncommon, there’s so much more to aging well.

Aging gracefully isn’t about trying to look like a 20-something — it’s about living your best life and having the physical and mental health to enjoy it. Like a bottle of wine, you can get better with age with the right care. Read on to find out what to do and what not to do on your quest to age happily.

Your skin is your body’s largest organTrusted Source. If you treat it with care, it can better protect your body from the elements, regulate your body temperature, and provide impression. tera keep it looking and functioning at its best : Wear sunscreen and protective clothing when outside. Get yearly skin cancer screenings. Stick to gentle products in your anti-aging skin care routine. Stay hydrated.

Your skin is your body’s largest organTrusted Source. If you treat it with care, it can better protect your body from the elements, regulate your body temperature, and provide impression. tera keep it looking and functioning at its best : Wear sunscreen and protective clothing when outside. Get yearly skin cancer screenings. Stick to gentle products in your anti-aging skin care routine. Stay hydrated.

Regular exercise significantly lowers your risk of diseases, such as heart disease and cancer, and helps you retain your mobility longer. Exercise also lowers stress and improves sleep, skin and bone health, and mood. The Department of Health

Healthy foods are the way to go when it comes to aging gracefully. The Dietary Guidelines for AmericansTrusted Source recommends that you eat : fruits and vegetables, either fresh, frozen, or cannedlean protein, such as fish and beansat least three ounces of whole-grain cereals, breads, rice, or pasta every daythree servings of low-fat or fat-free dairy, such as milk, yogurt or cheese that are fortified with vitamin Dhealthy fatsAvoid using solid fats for cooking and use oils instead. Stay away from processed foods, refined sugars, and unhealthy fats. You should also keep your salt intake to a minimum to keep your blood pressure down.

Being happy and keeping your stress down goes a long way in helping you live and age well. to keep your mood elevated : Spend time with friends and loved ones. Meaningful relationships and a strong social network improve mental and physical well-being and longevity. Don’t forget your furry loved ones as having a pet has been linked to lower stress and blood pressure, reduced loneliness, and better moods. Accept your age. There is evidence that people who maintain a positive attitude about aging live longer and may recover better from a disability. Aging is inevitable and learning to embrace it can make all the difference. Do things you enjoy. Taking the time to engage in activities you enjoy will only mazout your happiness. Spend time in nature, pursue a new hobby, volunteer — whatever brings you joy.

Numerous studiesTrusted Source have linked a sedentary life to an increased risk of chronic illness and early death. Some options to stay active are going on walks and hikes, taking vacations, and participating in group exercise classes.

The effects of stress on your body are vast, ranging from premature aging and wrinkles to a higher risk of heart disease. There are a number of proven ways to relieve stress, including : using relaxation techniques, such as meditation, breathing exercises, and yogaexercisinggetting adequate sleeptalking to a friend

Smoking and alcohol have both been shown to cause premature aging and increase the risk of disease. Quitting smoking isn’t easy, but there are resources available to help you quit. Speak to a doctor about how to quit. As for alcohol, limit your intake to the recommendedTrusted Source amount to avoid health risks. That’s one drink per day for women and two drinks per day for men.

Good sleep is important for your physical and mental health. It also plays a role in your skin’s health. How much sleep you need depends on your age. Adults over 18 should aim for seven to eight hoursTrusted Source of sleep every night. Getting enough sleep has been proven to : lower the risk of heart disease and strokereduce stress and depressionlower the risk of obesityreduce inflammationimprove focus and concentration

Finding new and meaningful hobbies can help you maintain a sense of purpose and keep you engaged throughout the course of your life. Evidence shows that people who engage in hobbies and leisure and social activities are happier, experience less depression, and real longer.

Mindfulness is about acceptance and living in the moment by focusing on the present. Practicing mindfulness has many proven health benefits that can help you age better, including : improved focusbetter memorylower stressimproved emotional reactionrelationship satisfactionincreased immune functioningTo practice mindfulness, try : meditationyogatai chicoloring

Drinking enough water helps keep you regular and improves your energy levels and brain function. Coincidentally, it’s also been provenTrusted Source to help keep skin healthier and reduce signs of aging. How much water you should drink depends on : your thirstyour activity levelhow often you urinate and move your bowelshow much you sweatyour genderSpeak to a doctor if you have questions or concerns about your water intake.

Not taking care of your teeth not only ages your smile, but also puts you at risk for gum disease, which has been linked to heart disease, stroke, and bacterial pneumonia. Along with proper oral care, it’s important to see a dentist regularly. According to the American Dental Association, a dentist can spot signs of nutritional deficiencies, contamination, cancer, and other illnesses, such as diabetes. They recommend brushing twice a day, flossing once a day, and using a mouth rinse.

Seeing a doctor regularly can help the doctor find problems early or even before they start. How often you see a doctor depends on your age, lifestyle, family history, and existing conditions. Ask your doctor how often you should go in for checkups and screening contrôles as you age. Also, see a doctor anytime you experience concerning symptoms.

Though aging is inevitable, some people find it difficult to deal with the changes that come with getting older. If you’re worried about your health, are having trouble feeling positive about aging, or worry that you’re not aging well it’s important to reach out for help. Talk to someone you trust, such as a family member or close friend. Professional help is also available through a doctor or a counselor.

Aging gracefully is more about being saine and happy than keeping wrinkles at bay. Maintain a saine lifestyle, surround yourself with people you love, and do things that bring you joy. It’s natural to worry about the challenges that aging can bring, so don’t hesitate to speak to someone about your concerns.

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