How dehydration can increase your blood sugar levels (2024)

WRITTEN BY: Ginger Vieira

28-10-2021

This content was created as part of a paid partnership withUltima supplement, an active partner of Beyond Type 1 at the time of publication.

Water stands for50 to 60 percent of your body weight-and almost 75 percent for newborn babies! For the average adult, 50 kg of your body weight is water.

Clearly, keeping up with your daily hydration, especially during exercise, is a crucial part of your body's ability to function. It is an important part of diabetes management.

But almost75 percent of Americansis regularly dried out.

Here we discuss dehydration and its impact on your blood sugar levels as a person with diabetes.

Why your body needs water

When your body's water weight begins to drop below 50 percent for any reason, symptoms of dehydration can develop and even affect your blood sugar levels.

Water helps your body function in a number of different ways, including:

  • Transport of oxygen and nutrients (including glucose) through the bloodstream to the cells
  • Hormone production
  • Neurotransmitterfunctie
  • Regulation of your body temperature
  • Keeps the membranes moist
  • Keep your eyes clean and moist
  • Smells, tastes and swallows food
  • Bowel movements
  • Passes toxins and waste through urine and sweat
  • Metabolizing the food you eat for energy
  • Dissolves minerals and vitamins in your food
  • Produces saliva
  • Lubricate your joints
  • Isolation of your brain, spinal cord, organs and fetus (during pregnancy)
  • Protects your joints/organs/bones through shock absorption

Symptoms of dehydration include:

  • Headache, dizziness, lightheadedness
  • Fatigue
  • Dry mouth or dry cough
  • Increased heart rate
  • Low bloodpressure
  • Lack of appetite
  • Sugar cravings
  • Swelling in your feet/hands
  • Muscle cramps
  • Constipation
  • Dark colored urine
  • And for people with diabetes: a sudden increase in blood sugar levels

How dehydration can increase your blood sugar levels

When you become dehydrated, it means that the amount of water in your bloodstream decreases, making the existing glucose (sugar) in your bloodstream more concentrated.

Although the amount of sugar in your bloodstream has not technically increased, it can lead to high blood sugar levels because the ratio of sugar to water has changed.

Think of it this way: when you make maple syrup, you collect sap from trees. Juice is actually 95 percent water and only 5 percent sugar! Boiling the juice, which reduces the amount of water through evaporation, makes the sugar in the juice more concentrated. This creates a thick, sweet syrup that tastes delicious on pancakes. Less water = more concentrated sugar.

Your bloodstream needs sufficient water to maintain the ideal ratio between water and glucose.

  • Mild to moderate dehydration – especially during hot weather, intense exercise, or illness (diarrhea or vomiting) – can easily raise your blood sugar levels by 50 to 100 mg/dl or higher.
  • Severe dehydration can be life-threatening due to many factors, including concentrated blood sugar levels and too few electrolytes, sodium and potassium.
  • If you experience an illness that causes severe dehydration or vomiting and you are unable to drink properly, go to the emergency room or emergency room to receive intravenous fluids immediately.

Simply rehydrating through intravenous fluids or drinking water and other hydration drinks can make a big difference in getting your blood sugar levels back to safe levels.

Keep in mind that hydration fluids like Gatorade and Pedialyte may contain sugar. Read nutrition labels carefully and talk to your doctor about possible dosing of insulin with the hydration drink.or by choosing "no sugar" or "low sugar"..

Untreated, severe dehydration can lead to diabetic ketoacidosis and other life-threatening conditions.

How much water should you drink every day?

According to most people, drinking water when you are thirsty is enoughrecent research. (Yes, other water-based drinks count too, but beware of high sugar amounts or consuming too much caffeine, which is a diuretic and can lead to dehydration.)

You may need more than six to eight glasses of water per day if:

  • You are taking a medicine that increases your body's urine production
  • You train intensively, especially for those involved in endurance training
  • You are in extremely hot weather
  • You have recently suffered from diarrhea or vomiting and need to refill
  • You are pregnant or breastfeeding

You may need to limit your water intake if:

  • You have certain health problems, including kidney, liver or heart failure
  • You are experiencing symptoms ofoverhydration
  • You are taking medications that cause fluid retention
  • You are taking other medications, including certain antidepressants and opiates
  • Your doctor has asked you to reduce your water intake for some reason

Talk to your doctor about your personal goals and concerns about water consumption!

WRITTEN BY Ginger Vieira, POSTED 10/28/21, UPDATED 7/22/22 Ginger Vieira is a writer and author who suffers from type 1 diabetes, celiac disease, fibromyalgia, and hypothyroidism. She has written a number of books, including “When I Go Low” (for children), “Pregnancy with Type 1 Diabetes” and “Coping with Diabetes Burnout.” Before joining Beyond Type 1 as digital content manager, Ginger wrote for Diabetes Mine, Healthline, T1D Exchange, Diabetes Strong and more! In her spare time she jumps rope, rides a scooter with her daughters or goes for walks with her handsome boyfriend and their dog.

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How dehydration can increase your blood sugar levels (2024)

FAQs

How dehydration can increase your blood sugar levels? ›

Dehydration occurs when the water losses from the body are greater than the water someone takes in from drinking. It can cause a person's blood sugar levels to rise. This occurs when the amount of water in the bloodstream decreases, increasing the concentration of blood sugar in the blood.

Can being dehydrated make your blood sugar high? ›

Your bloodstream needs adequate levels of water in it to maintain that ideal ratio of water vs. glucose. Mild to moderate levels of dehydration—especially during hot weather, intense exercise, or illness (diarrhea or vomiting)—can easily spike your blood sugar 50 to 100 mg/dL or higher.

Can dehydration cause you to fail a glucose test? ›

He found that reduced water consumption resulted in increased glucose concentration before and during the OGTT.

Does drinking water help raise low blood sugar? ›

Water will not raise blood glucose levels, which is why it is so beneficial to drink when people with diabetes have high blood sugar, as it enables more glucose to be flushed out of the blood.

Why is my blood sugar high when I have not eaten anything? ›

But sometimes, your blood sugar goes up even when you fast. It could be because your body isn't making enough insulin, a hormone that allows your cells to absorb the sugar. Or it could be because your body has become insulin resistant. It could also be because your body is making too much sugar .

What to drink to lower blood sugar immediately? ›

Editor's summary. Drinking water is an excellent way to stay hydrated without consuming sugar. Green tea, cow's milk, and fermented milk (kefir) could also help you manage your blood sugar responses. Coffee also contains compounds that may help regulate blood sugar, but confirming this requires more research.

How do you feel when your blood sugar is too high? ›

increased thirst and a dry mouth. needing to pee frequently. tiredness. blurred vision.

What can cause falsely high A1c? ›

Several medications and substances have also been reported to falsely elevate A1c including lead poisoning2, chronic ingestion of alcohol, salicylates, and opioids. Ingestion of vitamin C may increase A1c when measured by electrophoresis, but may decrease levels when measured by chromatography.

What labs are abnormal with dehydration? ›

Biochemical changes
  • Raised serum urea.
  • Raised creatinine.
  • Reduced estimated glomerular filtration rate (eGFR)
  • Increased urea:creatinine ratio.
  • Hypernatraemia (loss of water greater than salt loss)
  • Raised serum or urine osmolality.
  • Raised urine specific gravity.
Jun 15, 2017

Does drinking water flush sugar out of your body? ›

Drinking plenty of water helps your kidneys flush out excess sugar. One study found that people who drink more water lower their risk for developing high blood sugar levels. And remember, water is the best.

What is the best thing to eat when your blood sugar is low? ›

Foods that contain protein or fat, such as peanut butter, ice cream, and chocolate, may be helpful if your blood sugar level has dropped but isn't below 70 mg/dL. These higher-fat foods, as well as whole-grain bread and other high-fiber foods, take longer to absorb into your bloodstream.

How can I flush my blood sugar fast? ›

Drink water: Water helps flush out excess sugar from your kidneys. Manage stress: Stress can affect your blood sugar levels. Yoga, meditation, and other relaxation techniques can help. Get enough sleep: Sleep deprivation can increase your appetite and cortisol levels, promoting weight gain.

Is 135 blood sugar high in the morning? ›

What should your blood sugar be when you wake up? Whenever possible, aim to keep your glucose levels in range between 70 and 130 mg/dL in the morning before you eat breakfast, and between 70 and 180 mg/dL at other times.

Why do diabetics wake up at 3am? ›

The cause of the dawn phenomenon isn't clear. Some researchers believe the overnight release of certain hormones that happens naturally increases insulin resistance. That causes blood sugar to rise. The hormones are called counter-regulatory hormones because they have an effect that opposes the effect of insulin.

Does squeezing the finger affect blood sugar reading? ›

If your hands are clean and dry, you can use the first drop of blood that comes from the finger prick. If for some reason you can't wash them, just wipe away the first drop and use the second. But don't put too much pressure on the site or squeeze it – that may throw off your reading.

How can I lower my blood sugar quickly? ›

The fastest way to lower blood sugar is to take fast-acting insulin medication. Exercise can also help to bring down blood sugar levels quickly. Diet and lifestyle changes can help manage overall blood sugar levels, but for immediate action, prescription medication or medical assistance may be necessary.

Does being dehydrated make you want sugar? ›

Dehydration is the most common cause of sugar cravings. When your body is dehydrated, you will likely experience a strong urge to eat something sweet, but all your body needs is water. Dehydration makes it difficult for your body to metabolize glycogen for energy.

Is it normal for your blood sugar to go up and down? ›

It is completely normal for your blood sugar levels to go up and down every day in response to the food you eat. Between around 60 and 140 milligrams of sugar per deciliter of blood (mg/dl) is considered to be normal in people who don't have diabetes.

How much can stress raise blood sugar? ›

Stress hyperglycemia is when a person without diabetes has high blood sugar levels of over 180mg/dl due to stress. Hormones and inflammation cause blood sugars to rise to similar levels that doctors see in diabetes.

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