Postprandial Lipemia

This study is a single-center, prospective, open-label, randomized 2×2 crossover controlled trial in healthy adults aged 18 to 45 years. The study aims to evaluate the acute effect of a standardized large yellow tea extract on triglyceride responses after a standardized high-fat meal. Participants will be randomly assigned to one of two intervention sequences. In one study period, participants will consume 3 g of standardized large yellow tea extract dissolved in 250 mL of warm water after a standardized high-fat meal. In the other period, they will consume 250 mL of warm water as the control. The two study periods will be separated by a washout period of at least 7 days. Blood samples will be collected before the meal and at 0.5, 1, 1.5, 2, 4, and 6 hours after the meal. The primary outcome is the incremental area under the curve for plasma triglycerides from 0 to 6 hours. Secondary and exploratory outcomes include other postprandial lipid and metabolic measures, safety and tolerability, and plasma and urine metabolomic profiles.