A diet that consists mostly of bacon, cheese, steak, and avocados sounds like a dream. A big, greasy dream filled with all the cheddar omelets and ribeye you could want. Deliciously fatty foods usually don't scream "healthy," but many people swear by these staples to lose weight. By eliminating all sugar and most carbs, and eating foods high in fat and protein, your body becomes a fat-burning machine, or so the theory goes. Win-win, right?
Not quite. A big downside, other than missing sugar and everything in the bread family (RIP, bagels), is what these extremely low-carb diets do to your breath. By getting your energy from fat and protein rather than carbs, one of the common byproducts is intolerable stank breath, and it’s not because of the bacon grease.
What’s causing that garbage mouth?
Atkins, the ketogenic diet, and most other low-carb eating plans all rely on getting your daily calories mostly from fat and protein, and very little from carbohydrates. If you keep your carb intake to less than 30 grams per day, your body eventually enters a metabolic state of ketosis. Instead of breaking down carbohydrates to create glucose for energy, your body instead breaks down stored fat, which release ketones in the body. They are also released in your breath, creating a distinct odor that some keto enthusiasts describe as rotten fruit, or even metallic.