Skip Nav
How to Stop an Anxiety Attack
Healthy Living
The 1 Mindfulness Trick That Helps Me Control My Anxiety in Just a Few Minutes
Healthy Recipes
These Holiday Recipes Are So Sinfully Delicious, You'll Never Believe They're Low-Carb
Fitness Gear
15 Gifts For Your Friend Who Would Rather Be at the Gym Than the Office
Healthy Eating Tips
Stuck in a Healthy Breakfast Rut? Get Inspired by These Pretty (Tasty!) Overnight Oats
Healthy Eating Tips
These Are the Tastiest, Healthiest Meals at Disneyland (Because Hi, So Many Churros)

Keto Diet Side Effects

A Doctor Explains What Negative Side Effects to Expect From the Keto Diet

Photographer: Ericka McConnell

The keto diet, the high-fat, moderate-protein, super-low-carb diet that puts your body into a state of ketosis, has helped countless people lose weight and fight inflammation. And while there are plenty of other positive health benefits, such as helping treat diabetes and transforming your life, there are some negative physical side effects of the diet, too.

When your body goes into a state of ketosis, it starts to burn fat for fuel instead of glucose. By burning through its fat stores, your body produces ketones in the liver. These ketones end up in your urine and your breath, giving you the dreaded "keto breath." The culprit is acetone, a ketone that enters into your breath that can smell metallic or like rotten fruit.

Going into ketosis can also give you dry mouth or a cottonmouth side effect. But these aren't the only unpleasant physical symptoms of the keto diet. In fact, when your body goes into ketosis, it can give you symptoms of dehydration.

ADVERTISEMENT

"Due to the fact that nutritional ketosis increases sodium (salt) excretion by the kidneys, if a person severely restricts salt intake in combination with this diet, dehydration symptoms like headache, fatigue, exercise intolerance, dry mouth, and constipation can occur," Steve Phinney, MD, PhD, chief medical officer at Virta Health, told POPSUGAR.

These dehydration symptoms aren't super common, but when they occur, they can be unpleasant. As a relief, Dr. Phinney suggests drinking one to two cups of salt-containing broth to replenish the sodium.

Ultimately, you shouldn't make any major dietary changes without consulting with your doctor first. With these side effects in mind, along with the other dangers of the keto diet, it's up to you and your healthcare provider to decide if keto is right for you.

Image Source: POPSUGAR Photography / Ericka McConnell
From Our Partners
Keto at Ruby Tuesday
Being Kind to Yourself While Losing Weight
Fitness Tips For Weight Loss From Autumn Calabrese
Meal Prep Weight Loss Hacks and Recipes
Does Counting Calories Help You With Weight Loss?
Can You Lose Weight Climbing Stairs?
90-Pound Weight-Loss Story Before and After
Reasons You've Hit a Weight-Loss Plateau
Biggest Diets of 2018
WW Pizza Dough Recipe
Best Fruits For Weight Loss
How to Get Rid of Belly Cellulite
From Our Partners
Latest Fitness
All the Latest From Ryan Reynolds