The CDC offers numbers: 4 ounces of kombucha can be safely consumed 1-3 times a day. So, in total, no more than 12 ounces per day. However, most kombucha brands bottle their product in 16-20 fluid-ounce bottles, so you've already surpassed the suggested limit if you finish a single bottle. Sticking to one full bottle every other day is a safe way to ensure your probiotics are up, your acid levels are even, and your sugar intake is right on track for a healthy day.