Science says so.
Meanwhile, intermittently fasting to put the body in ketosis — or relying on ketones instead of glucose for energy — is associated with some benefits.
Broths (bone or vegetable) can help replenish nutrients and minerals during a fasting period.
In one study, drinking tea while fasting instead of with a meal improved markers for cardiovascular health.
Caffeine can also increase fat oxidation, along with a host of other health benefits.
When taken in small doses, vinegar should not interrupt ketosis because it has less than 1 g of carbs per tablespoon.