Update: - Advertising Disclosure

Keyto Review - 10 Things You Need to Know

One of the hardest parts of maintaining a ketogenic diet is knowing when you are in a state of ketosis. A new product, called Keyto, promises to take the guesswork out of low-carb diets. It analyzes chemical markers in your breath to determine how much fat you are burning.

Our research team was intrigued. Are there clinical trials to back up the claims made by the makers, or is it a scam? We took a look at the evidence to determine the pros and cons and uncovered everything you need to know about Keyto and weight loss.

Keyto Readers: Click here to find out why Noom is our top choice.

What is Keyto?

Keyto is a smart breathalyzer that measures the acetone in your breath. According to Examine.com, your body produces ketone bodies when it enters a state of ketosis. Acetone is one of those ketone bodies. Bad breath is common on low-carb diets. It’s because of the acetone.

The breathalyzer, which resembles an electronic cigarette, connects to a smartphone app that tells you how far into ketosis you are. Your breath will give off a higher score when you have more acetone present in your breath.

Keyto Levels

  • Level 1 – Not in ketosis
  • Level 2 – Starting Ketosis
  • Level 3-5 – Increased fat burning potential
  • Level 6 – High fat burning potential
  • Levels 7-9 – Extreme fat burning potential
  • Level 10 – Deepest level of ketosis

The Keyto app does more than track ketosis. If you want to eat an avocado, the app will tell you how many carbs it contains. The app has tools to track your progress and help with meal planning. There is also a supportive online community to keep you motivated.

How Did Keyto Start?

Keyto was incorporated in 2014 by Dr. Ethan Weiss, Dr. Ray Wu, Liane Nakamura, and Gareth Everard. An Indiegogo campaign has raised $1,128,467 to date. A minimal number of pre-orders were shipped in January 2019. More orders are expected to ship in May 2019.


Keyto Claims

The makers of Keyto make multiple claims regarding this ketogenic lifestyle product.

  • Lose weight the natural way
  • Backed by science
  • Easy to use
  • Accurate
  • Intuitive
  • Reliable

Keyto Ingredients

The system consists of a lightweight breathalyzer and an app that tracks your progress.

Does Keyto Work?

The makers claim this product is backed by more than a decade of science. Our research team was hoping they would make their studies public. Unfortunately, they didn’t.

We did find one study that shows it could work. The study, published in the American Journal of Nutrition concluded that measuring breath acetone is an effective way to determine if a person is in a state of ketosis.

Keyto Benefits and Results

A limited number of breathalyzers were released to the public in early 2019. Our research team couldn’t find any reviews online, but there was plenty of buzz about Keyto in keto-focused diet groups. Some dieters were excited. They liked the idea of knowing exactly when they entered a state of ketosis. Others were turned off by the price, especially considering ketone urine strips are just as effective and cost a fraction of the amount of Keyto.

Details on Keyto and Weight Loss

Will Keyto help you lose weight? It can. While Harvard medical researchers admit the research available on the keto diet is limited, there is a potential for weight loss.

One long-term study, published in the Journal of Clinical Cardiology, found a ketogenic diet can reduce body weight, decrease triglyceride levels, lower LDL cholesterol and reduce blood glucose levels.

The keto diet is difficult to maintain. If Keyto simplifies the process, more people might turn to the low-carb trend.

It’s worth mentioning that Examine.com researchers found that a low-fat diet and low-carb diet produce the same results in weight loss and other health markers.

How to Use Keyto

The system is easy to use. Just breathe into your breathalyzer, and check your score on your smartphone.

Side Effects

Potential Keyto Side Effects

There are no side effects associated with Keyto. There are, however, side effects associated with a keto diet.

The most commonly reported keto side effect is carb flu. The symptoms of carb flu include:

  • Sugar cravings
  • Muscle soreness
  • Insomnia
  • Diarrhea
  • Nausea
  • Constipation
  • Vomiting
  • Cramps
  • Weakness
  • Mood swings
  • Trouble concentrating
  • Headaches

A low-carb diet can also result in increased cholesterol in some followers. Kidneys must process the extra protein, so men and women with kidney problems must talk with their physician before cutting out carbs.

Dr. Anthony Dugarte reminds dieters to seek advice before starting any low-carb diet. “Discuss desires to make any large changes to a meal plan with a physician.”

Bottom Line

Bottom Line on Keyto

Keyto is a great way to track your progress on a ketogenic diet, but do you want to commit to a ketogenic lifestyle? You’ll have to say goodbye to the foods you love and eat a high-fat diet that could have adverse effects on your health.

We are in full support of living a healthier life, and we also know that means being at your healthy weight. Sometimes, the changes that are needed are difficult, but they don’t have to be with a clinically-proven system made just for you.

One of the best weight-loss apps we have seen is one called Noom. With personalized meal plans, coaching, and customized health information, Noom makes it easy to make healthier choices and lose weight without restrictive dieting.

For a limited time, Dietspotlight readers can get a 14-day free trial of Noom with 100% access.

Learn More About Noom »
Keyto Review
Keyto Customers Also Bought:
Explanation of Chart
Garcinia Cambogia
Caralluma Fimbriata
Raspberry Ketones


What is Keyto?

Keyto is a ketosis measuring system. You blow into the mouthpiece and the machine measures the ketones in your breath.

What makes up Keyto?

Keyto is a breathalyzer.

What are the side effects of Keyto?

There are no known side effects of Keyto, other than the small possibility of an incorrect reading.

Does Keyto work?

Yes, Keyto measures the ketones in your breathe giving a highly accurate representation of how deep in ketosis your body is at any given time.

Is Keyto for men or women?

Keyto is ideal for both men and women.

Where can I buy Keyto?

You can purchase the Keyto device on the official website. It started on Indiegogo with massive support.

Is there a Keyto free trial or sample?

We were unable to find a free trial or sample mentioned on the official website.

What is the most common Keyto complaint?

The only complaints we found were from users who claimed the results were inaccurate, but those reports are extremely rare.

What are some similar products to Keyto?

Two similar products are Perfect Keto and Keto Mojo.

3 Keyto Reviews

  • does not work
    chad buccini (Verified Purchase)

    I got my Keyto device yesterday and it kept saying the battery voltage was to high. I guess that was my fault for using the battery that they provided. After emailing them, they told me the products they shipped were defective and then they told me to buy different batteries. It is a triple A battery…. so I tried 5 different ones…..none worked….. I am in the process of returning it now.

    • San

      Dont give up. I have been using it for 2 weeks and it works flawlessly. Probably your device is lemon and need replacement.

  • James (Verified Purchase)

    I’ve had mine for 2 months now and use it a LOT. I need a positive feedback loop to keep me going and this really provides it.