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What happens when ketones are high?

Author

Penelope Carter

Updated on February 21, 2026

What happens when ketones are high?

If your cells don't get enough glucose, your body burns fat for energy instead. This produces a substance called ketones, which can show up in your blood and urine. High ketone levels in urine may indicate diabetic ketoacidosis (DKA), a complication of diabetes that can lead to a coma or even death.

Considering this, what is a dangerous level of ketones?

1.6 to 3.0 mmol/L – a high level of ketones and could present a risk of ketoacidosis. It is advisable to contact your healthcare team for advice. Above 3.0 mmol/L – a dangerous level of ketones which will require immediate medical care.

Secondly, how do you treat high ketones? If you detect ketones in your blood or urine, general treatment guidelines include drinking plenty of water or other calorie-free fluids to help flush ketones out of the body, taking insulin to bring your blood glucose level down, and rechecking both your blood glucose level and ketone level every three to four hours.

Then, what causes high ketones?

Ketones are chemicals that build up when your body starts to burn fat for energy. The most common cause of ketones in diabetics is insulin deficiency. Without enough insulin, glucose builds up in the blood stream and can't enter cells. This results in ketones forming in the blood and eventually spilling into urine.

What should I do if your ketones are high?

Also try these steps to bring down your ketone levels:

Drink extra water to flush them out of your body.
Test your blood sugar every 3 to 4 hours.
Don't exercise if you have high blood sugar and high ketones.

What happens when your ketones are too high?

When ketones build up in the blood, they make it more acidic. They are a warning sign that your diabetes is out of control or that you are getting sick. High levels of ketones can poison the body. When levels get too high, you can develop DKA.

Does drinking water reduce ketones?

Drinking water alleviates the stress on your kidneys.

Since ketones are acidic and can get flushed out as opposed to being used as fuel, drinking water helps to keep your kidneys functioning as they should.

What organs are affected by ketoacidosis?

DKA can cause complications such as:

Low levels of potassium (hypokalemia)
Swelling inside the brain (cerebral edema)
Fluid inside your lungs (pulmonary edema)
Damage to your kidney or other organs from your fluid loss.

What is a good ketone level?

The acceptable range for blood ketones is less than 0.6 mmol/L. If the range is between 0.6 and 1.5 mmol/L, you should recheck your blood glucose and ketones in two to four hours. If the range is between 1.5 and 3.0 mmol/L, you may be at risk for developing ketoacidosis.

What are the warning signs of diabetic ketoacidosis?

What are the symptoms of diabetic ketoacidosis?

frequent urination.
extreme thirst.
high blood sugar levels.
high levels of ketones in the urine.
nausea or vomiting.
abdominal pain.
confusion.
fruity-smelling breath.

What are the signs of ketosis?

Here are 10 common signs and symptoms of ketosis, both positive and negative.

Bad Breath. Share on Pinterest.
Weight Loss.
Increased Ketones in the Blood.
Increased Ketones in the Breath or Urine.
Appetite Suppression.
Increased Focus and Energy.
Short-Term Fatigue.
Short-Term Decreases in Performance.

Can ketosis kill you?

"There's a ton of research on ketogenic diets."

diet. It's killing people perfectly well." — Brett R. You're right that there is some research on the ketogenic diet, but not much looks at the long-term effects on overall health and weight maintenance.

What should I do if my ketones are high?

Also try these steps to bring down your ketone levels:

Drink extra water to flush them out of your body.
Test your blood sugar every 3 to 4 hours.
Don't exercise if you have high blood sugar and high ketones.

Can you have ketones without having diabetes?

People without diabetes can also have ketones in the urine if their body is using fat for fuel instead of glucose. This can happen with chronic vomiting, extreme exercise, low-carbohydrate diets, or eating disorders. Checking your ketones is especially important if you have diabetes and: You've been vomiting.

Can stress cause ketones?

Ketones typically accompany high blood sugar. Most often if your body needs more insulin, it means you probably have a high blood sugar. Also, when an illness is present, your body releases hormones in response to the stress. These hormones lead to elevated blood glucose.

How can I lower my ketones quickly?

You can also try these steps to bring down your ketone levels:

Drink extra water to flush them out of your body.
Test your blood sugar every 3 to 4 hours.
Don't exercise if you have high blood sugar and high ketones.

How can I lower my urine ketones?

If you detect ketones in your blood or urine, general treatment guidelines include drinking plenty of water or other calorie-free fluids to help flush ketones out of the body, taking insulin to bring your blood glucose level down, and rechecking both your blood glucose level and ketone level every three to four hours.

What foods are high in ketones?

Here are 16 healthy foods to eat on a ketogenic diet.

Seafood. Fish and shellfish are very keto-friendly foods.
Low-Carb Vegetables.
Cheese.
Avocados.
Meat and Poultry.
Eggs.
Coconut Oil.
Plain Greek Yogurt and Cottage Cheese.

Can you smell ketones in urine?

When the body excretes these in urine, they can make the urine smell like popcorn. A high level of ketones in the urine or blood is called ketosis. The body will produce ketones when it does not have enough sugar or glucose for fuel. In most cases, people with ketoacidosis have sweet, strong-smelling urine.

Are high ketones bad?

If you have uncontrolled diabetes, ketosis can become dangerous when ketones build up. High levels lead to dehydration and change the chemical balance of your blood. It becomes acidic and can cause a coma or death. Some people without diabetes can get ketoacidosis, too.

Does dehydration cause ketones in urine?

A patient presenting symptoms such as disorientation, low blood pressure, rapid heartbeat, fever, lack of sweat, and inelastic skin will usually be considered dehydrated. In a dehydrated person, urine will be darker in color and more concentrated – containing a certain level of compounds called ketones.

What causes high ketones in blood?

Ketones are chemicals that build up when your body starts to burn fat for energy. The most common cause of ketones in diabetics is insulin deficiency. Without enough insulin, glucose builds up in the blood stream and can't enter cells. This results in ketones forming in the blood and eventually spilling into urine.

What do ketones in urine look like?

People with diabetes may have a very high level of ketones in their bloodstream. When the body excretes these in urine, they can make the urine smell like popcorn. A high level of ketones in the urine or blood is called ketosis. In most cases, people with ketoacidosis have sweet, strong-smelling urine.

When should you go to the hospital for ketones?

High levels of ketones cause the blood to become more acidic, a condition known as diabetic ketoacidosis (DKA). Ketoacidosis can make you very sick if you don't get help. Go to the ER or call 911 right away if you have symptoms of ketoacidosis like: nausea and vomiting.

Why are my ketones high in the morning?

Having too many ketones in the blood is called ketosis, and it's common to be in a low-level state of ketosis when waking up in the morning, as the body was “fasting” during the night. The risk with ketones, however, is that too many in the blood makes it acidic, leading to DKA.

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What happens when ketones are high?