What is Kombucha?
Kombucha is a fermented beverage made from tea, sugar, bacteria, and yeast, called a SCOBY (Symbiotic Culture of Bacteria and Yeast). During the fermentation process, the SCOBY consumes most of the sugar, creating beneficial bacteria, enzymes, and organic acids. These ingredients not only help improve the digestive system but also provide many other health benefits.
Nutritional Value of Kombucha
The nutritional composition of kombucha varies depending on the ingredients and production method. According to data from USDA FoodData Central, one serving of kombucha (8 ounces) contains:
Calories: 40
Carbohydrates: 10g
Total sugar: 10g
Protein, fat, fiber: Negligible
Sodium: 5mg
Flavored kombuchas often contain more sugar than homemade or unflavored kombucha.
Health Benefits of Kombucha
1. Promote gut health
Kombucha is a source of beneficial bacteria and probiotics, which help balance the gut microbiota. Bacteria such as Lactobacillus nagelii and Gluconacetobacter help improve digestion, nutrient absorption, and promote digestive health.
“Kombucha from green and black teas has been shown to promote the growth of beneficial gut bacteria in animal studies, which may be related to the phenolic compounds in kombucha,” says Brittany Lubeck, a registered dietitian.

2. Antibacterial properties
During fermentation, kombucha produces organic acids such as acetic acid and lactic acid, which have natural antibacterial effects, helping to inhibit the growth of harmful bacteria and fungi.
However, studies have been mainly focused at the laboratory level and there is not much human data to confirm these effects.
3. Supports liver health
Kombucha contains antioxidants such as polyphenols, which help protect the liver from oxidative stress and inflammation.
Does Kombucha Really Aid Weight Loss?
Although kombucha is not a "miracle drug" for rapid weight loss, it can contribute indirectly to weight loss in the following ways:
Replace high calorie drinks
Kombucha is typically lower in calories than sugary soft drinks or juices, making it a healthy alternative for those looking to cut back on calories.
Supports gut health
The probiotics in kombucha help improve digestion, nutrient absorption, and balance the gut microbiome. This plays an important role in maintaining a healthy weight.
Support the detoxification process
Kombucha contains polyphenols – compounds that can protect cells from oxidative damage and support the liver, the body’s natural detoxification organ. A healthy liver can help the body eliminate toxins more effectively, thereby supporting weight loss.