Meanwhile, intermittently fasting to put the body in ketosis — or relying on ketones instead of glucose for energy — is associated with some benefits.
One way to fast safely is with the help of liquids low in calories and carbs that won’t break that metabolic switch.
In one study, drinking tea while fasting instead of with a meal improved markers for cardiovascular health.
When taken in small doses, vinegar should not interrupt ketosis because it has less than 1 g of carbs per tablespoon.
Water is the liquid that needs no introduction. It’s key to stay hydrated, even on a strict fast.