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How To Tell If Your Body is in Ketosis

If you're following a keto diet, you might be wondering how to tell if your body has entered a state of ketosis. Here are some of the most common symptoms and signs your keto diet is working and your body is in ketosis.
Updated on Mar 13, 2024

If you’re following the keto diet, you might be wondering how to tell if your body is in ketosis. From physical signs and symptoms to ketosis testing devices, here’s how you can tell your keto diet is actually working and helping you achieve your health goals.

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Ketosis is a state your body enters when it doesn’t have enough carbohydrates to burn for energy. Instead, it burns fat and makes things called ketones, which it can use for fuel. This usually happens when you’re following a very low-carb diet, like keto. When your body is in ketosis, it’s using fat as its main energy source, which can lead to weight loss and other health benefits.

6 Signs You’re in Ketosis

1. Bad Breath

Have you noticed your breath is a little more odorous than normal? When your body is in a state of ketosis, elevated ketone levels can cause not only your pee to smell, but cause your breath to smell too due to higher levels of acetone. While not the best for your social life, bad breath is often a positive sign your keto diet is working. And bad breath is an easy fix – just keep some sugar-free gum on-hand at all times.

2. Increased Tiredness

Increased tiredness and fatigue are common yet short-term side effects when your body first starts transitioning into a state of ketosis. When you start drastically reducing your carb intake, your body produces less insulin and starts using up its glycogen stores. When this happens, your body excretes more water with the glycogen, so oftentimes your tiredness is actually caused by dehydration. That’s why when on the keto diet you need to be making sure you’re always hydrated. You can add some Himalayan salt to your water to make the most out of your H20 consumption because it’ll help balance your electrolytes.

You might also fight if you have decreased energy and can’t train at your usual capacity. Decreased performance is another common but also short-term side effect when you first start a keto diet. Due to the lack of carb consumption, your body is trying to figure out where to get its energy from to power through workouts (which is usually glucose). Eventually, once your body realises there is no glucose to use as energy it’ll search for energy elsewhere, which is when it will reach for ketones as its fuel source. Once this happens, you might find you have more energy than ever before.

3. You’re Not as Hungry

Finding yourself not as hungry as usual? Ketosis could be the cause. There are two hormones that influence our hunger and appetite – ghrelin and cholecystokinin (CCK). When your keto levels are elevated, both these hormones are reduced, which means you often end up feeling less hungry and more satisfied between meals.

4. Digestive Problems

On the flip side, you might also find you have increased digestive issues. This is because a keto diet focuses on high fat, protein and low carbs, This change in diet can cause either diarrhea or constipation in some people. That’s why during the first stage of starting a keto diet it might be a good idea to take digestive enzymes with your meals to aid in the digestion of fat, which can also help with diarrhea issues. If you’re on the opposite end of the spectrum and find you’re constipated, make sure you’re getting enough veggies and fibre in your diet. Again, these symptoms should clear up once your body gets used to the new way of eating.

5. Muscle Cramps & Spasms

Another uncomfortable ketosis symptom is muscle cramps and spasms. When you restrict carbs, your body produces less insulin. And, with less insulin in your body, your kidneys release more sodium, which can throw your other essential electrolytes out of balance. The outcome? Increased muscle cramping. This is another reason to add some Himalayan salt to your water to help balance your electrolytes and reduce any muscle cramps and spasms.

6. More Ketones in Your Blood

Finally, a really simple and scientific way to test if your body is in a state of ketosis is by testing your ketones using a blood ketone meter. You’re in ketosis when your blood ketone levels are at 0.5mmol/L or more. There are a range of keto testing kits on Amazon for you to choose from:

Keto TesterTypeCostLink
Abbot Freestyle Optimum NeoBlood$Amazon
Just Fitter Ketone Test StripsBlood$Amazon
Ketoscan MiniBreath$$$Amazon
KetonixBreath$$$Amazon
EZ KetoUrinalysis$$Amazon

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Recommended Keto Meal Providers

Are you considering starting a keto diet but not sure where to begin? Look no further! Check out our list of the best keto-friendly meal providers in Australia to help you get started.

These providers offer a range of delicious and nutritious options specifically designed to support your keto goals while satisfying your taste buds.

Say goodbye to meal prep stress and hello to convenient, wholesome eating with our recommended keto meal providers.

Ketosis FAQs

Is it good for my body to be in ketosis?

How long do you stay in ketosis?

The length of time you can stay in ketosis varies from person to person. Some people follow a ketogenic diet long-term (months or even years), while others may use it for shorter periods to achieve specific health or weight loss goals. Staying in ketosis depends on consistently eating a very low-carb diet. If you increase your carb intake, your body will likely exit ketosis.

How much weight can you lose in a month on keto?

Weight loss on a keto diet can vary based on factors like your starting weight, how strictly you follow the diet, and your level of physical activity. On average, people might lose anywhere from 1-5kg in the first month. Remember, much of this initial weight loss can be water weight. Actual fat loss may vary and typically becomes more gradual after the initial period.

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Ally Burnie
Ally Burnie
Health & fitness journalist and presenter based in Melbourne/Naarm with a passion for – you guessed it - health and fitness, cooking, outdoor adventures, hiking, and travel.

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