Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Black tea has been investigated for its potential role in supporting weight loss, largely due to its content of polyphenols, such as theaflavins and thearubigins, as well as caffeine. Scientific evidence for black tea’s effectiveness in weight loss is moderate and mainly comes from animal studies, with some supportive human trials. These compounds are thought to impact weight by influencing gut microbiota, increasing energy expenditure, and reducing fat absorption.

Some human studies have shown that regular black tea consumption may lead to modest reductions in body weight and waist circumference, likely due to its ability to boost metabolism and promote fat oxidation. For example, a randomized controlled trial published in the European Journal of Nutrition (2016) showed that participants who consumed black tea experienced changes in gut bacteria associated with weight loss and a small but significant loss of body weight compared to controls.

However, the effects are generally modest, and not all studies find significant benefits. The evidence is not as strong or consistent as that for green tea, which has higher concentrations of catechins. Overall, black tea may offer some support for weight management, particularly as a low-calorie beverage alternative and for its mild metabolic effects, but it should not be considered a primary intervention for weight loss.

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