Science says so.
Technically, fasting is going without any food for a period of time.
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Meanwhile, intermittently fasting to put the body in ketosis — or relying on ketones instead of glucose for energy — is associated with some benefits.
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One way to fast safely is with the help of liquids low in calories and carbs that won’t break that metabolic switch.
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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.
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If a jump-start to your metabolism is what you’re after, coffee can add an extra boost (though some scientists debate this). It can, however, provide some small amounts of protein.
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Caffeine can also increase fat oxidation, along with a host of other health benefits.
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When taken in small doses, vinegar should not interrupt ketosis because it has less than 1 g of carbs per tablespoon.
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Vinegar increases a feeling of fullness during a fast and may have other health benefits.
Sparkling water counts.
Water is the liquid that needs no introduction. It’s key to stay hydrated, even on a strict fast.
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