Short answer: Brew Dr. Kombucha, often searched as Dr. Brew, can have less sugar than many sodas, and it is raw, meaning unpasteurized, so it contains live cultures. But there’s no good evidence that drinking it improves health in specific ways, the amount of live bacteria in each bottle is debated, and some people, including those who are pregnant, should check with a doctor first.
What is in a bottle
The brand’s own pages describe organic tea, with organic fruit juices and botanicals added after fermentation. Each flavor has its own label, and the sugar, calories and caffeine differ between flavors, so read the label on the bottle you’re buying. The label is the most reliable place to check those numbers.
What “raw” means
“Raw” kombucha is not pasteurized, so the live yeasts and bacteria from fermentation survive in the bottle. Pasteurization uses heat, and heat kills them. The brand says it removes alcohol from its brew with a spinning cone column, a method it describes as avoiding high heat, and that it bottles the drink through a chilled process. These are the brand’s own descriptions. They explain how a drink can be both raw and non-alcoholic.
What might count in its favor
- Less sugar than many sodas. Kombucha generally has much less sugar than a typical soft drink, but it still contains sugar, and the amount varies by flavor.
- Some caffeine, usually far less than coffee. Tea-based kombucha contains some caffeine. The amount varies by brand and flavor.
- A fizzy alternative to soda. For many people, that’s the main appeal.
- Organic ingredients. The brand says it uses organic tea and fruit. That’s a preference, not a health claim.
What the evidence does and does not show
Kombucha contains live yeasts and bacteria, along with acids and small amounts of compounds from the tea. The research on kombucha is limited, so there isn’t good evidence that drinking Brew Dr. Kombucha, or kombucha in general, improves digestion, immunity or any other specific health outcome.
Probiotic claims
Raw kombucha contains live cultures, which some people call probiotics. How many live organisms a bottle contains, which strains they are, and whether they survive the stomach and reach the gut alive are all uncertain. Brew Dr. has faced consumer lawsuits questioning whether its probiotic claims matched the live cultures in its bottles. Those are the claims to look at closely before you buy for a probiotic effect.
Acidity and digestion
Kombucha is acidic. Some people find it upsets their stomach or makes acid reflux worse, and that’s worth noticing if it happens to you. If you have reflux or a digestive condition, talk with your doctor before making kombucha a daily habit. Timing and food can matter too, as covered in should you drink kombucha at night or in the morning?
Caffeine and alcohol
- Caffeine. Check the label. Some people are sensitive to caffeine, and it adds up across the day.
- Alcohol. Drinks labeled non-alcoholic must stay below 0.5% alcohol by volume in the US. Homebrewed kombucha isn’t made to a set alcohol level and can exceed that limit, which is one reason homebrew needs care.
Who should check with a doctor first
Health guidance generally advises checking with a doctor before drinking unpasteurized kombucha if you:
- are pregnant or breastfeeding
- are giving it to young children
- have a weakened immune system
- have a health condition that caffeine or acidity could affect
How to decide for yourself
- Read the label. Compare sugar, calories, caffeine and ingredients between flavors and brands.
- Start small. Have a small glass and see how your stomach feels.
- Be clear about your goal. If you want a lower-sugar alternative to soda, it may suit you. If you’re buying it for a specific health effect, the evidence doesn’t support that.
- Keep it cold. Raw kombucha is usually sold chilled, and it should be kept refrigerated after opening.
Homemade and store-bought
Homemade kombucha varies from batch to batch in sugar, acidity, alcohol and live culture content. You control the ingredients, but you can’t promise consistency, and you take on the hygiene and safety steps yourself. Store-bought bottles come labeled with ingredients and nutrition information, but they still vary by brand and flavor. Either way, the health questions above apply.
For the basics of brewing your own, see what is a kombucha starter?. For a wider look at store-bought kombucha, see what people say about Costco’s kombucha.