Answer: Bacon is famously keto-friendly.
Each slice of bacon is about 3 g protein, 3 g fat, and 0 g carbs, making it very popular in the keto community.
Uncured bacon is generally a safer choice, as some brands cure their bacon using sugar. When in doubt, simply check the ingredients and choose brands that don't use sugar or other sweeteners. That said, even bacon cured with sugar is pretty keto-friendly, as the sugars don't add much to the total carb count.