We can't think of a more depressing way to drop a hundred bucks.
keyto carb breathalyzer tool

Photo: Courtesy Keyto

We've discovered some pretty crazy diet gadgets on the market lately-like this shock bracelet that punishes you for bad eating habits-and the latest gizmo we've seen is geared towards the ever-popular keto diet. Keyto is a new breathalyzer tool that determines if you have eaten "too many" carbs, as well as what "level" of ketosis your body is (or isn't) experiencing.

Using Keyto seems pretty simple. All you have to do is exhale onto the Keyto breath-measuring stick for 10 seconds and the battery-powered gadget will determine your level of ketosis, based on how much acetone vapor is detected your breath. Then it'll display the level on a 1-8 scale via the Keyto App.

Acetone-yep, the ingredient used in nail polish remover-is a type of ketone, the family of acids produced when your body starts utilizing fat instead of carbohydrates as fuel. Ketones are a natural byproduct of ketosis, but acetone specifically gives low-carb dieters the common side effect of "keto breath."

The Keyto app will track user progress over time and link one's keto level measurements to their weight. Users can also pay an additional $96 each year to get advice on how to improve their ketosis levels with different meals and foods.

While this could be a beneficial tool for hard-core keto dieters, touting accuracy and reliability, one experimenter at INSIDER found Keyto couldn't always detect high-carb foods shortly after consumption and the device must be connected to the internet to work, although he did like receiving "quick-fire feedback" on his diet. Additionally, this device could certainly trigger disordered eating behaviors, as one could easily grow obsessed with attaining a certain ketosis level reading at all times.

"This seems like a very unnecessary tool for tracking," says Lisa Valente, M.S., R.D., Nutrition Editor at EatingWell.

While adherents of the popular diet are singing keto praises all over our social media accounts, Valente says she is not joining in on the ultra low-carb "fun."

"I'm not pro-keto diet by any means. If you're eating an extremely low amount of carbohydrates, your body will go into ketosis to keep you alive-your brain needs fuel! Once you eat carbs again, you'll come out of a ketogenic state and use glucose for energy. You probably don't need a breath test to tell you that you ate a bagel."