Why green tea extract appears in weight-management products
Green tea contains catechins such as EGCG and often caffeine. These compounds have been studied for energy expenditure, fat oxidation and body-weight outcomes.
What NIH says about effectiveness
The NIH Office of Dietary Supplements describes the average weight effect of green tea preparations as small and not clearly clinically meaningful. Some analyses suggest a modest effect when catechins are combined with caffeine, while other trials show little or no meaningful change.
Extracts are not the same as tea
Concentrated green tea extract can deliver catechins in amounts very different from a brewed beverage. NIH notes reported adverse effects including nausea, constipation, abdominal discomfort, increased blood pressure and liver injury in some users.
Caffeine can be hidden in the category
Tea extracts can contain caffeine even when a front label does not emphasize it. Total daily caffeine from coffee, tea, energy drinks and supplements matters more than looking at one product in isolation.
Sources
- NIH Office of Dietary Supplements, Dietary Supplements for Weight Loss: Consumer and Health Professional Fact Sheets.
- SeroBurn official FAQ and ingredient pages, reviewed September 2026.