In fact, breath acetone is actually a good predictor of ketosis. When we are in ketosis, a portion of the ketones get converted into the ketone acetone, which is excreted via our breath. What this looks like is no more than 50 g of total carbohydrates, roughly 1 to One Shot Keto of protein per kg of lean body mass, and fat to make up the remaining calories . The truth is, there's a lot to unpack when it comes to keto—but rest assured, you're in the right place. But a number of nutritionists and doctors caution against the diet, encouraging people instead to regulate their meals and consumption in a more sustainable way.