It is hard to say based on the limited info he posted, but you only enter ketosis if you consume under 20-50 g of carbs per day. A single slice of bread, one yo

It is hard to say based on the limited info he posted, but you only enter ketosis if you consume under 20-50 g of carbs per day. A single slice of bread, one yogurt, a bowl of cereal, or even a few carrots can take you out of it. You can't really accidentally get into ketosis without very deliberately avoiding carbs.