Soda Isn’t Allowed on Keto, but Unsweetened Sparkling Water Is a Great Choice For many people, the keto diet involves a drastic shift in eating — and drinking — habits. If you are a soda drinker, in particular, you’ll want to avoid it while you’re on the keto diet, or potentially switch to a diet version, says Herrmann. It may be tough to do at first, but soda contains a lot of sugar, and ingesting less of the sweet stuff will benefit your hea…