Here is a study that confirms green tea (including matcha) causes significant reduction in LDL-cholesterol (aka bad cholesterol) concentration. I read that in this article which contains first-hand matcha information from renowned tea farmers and teamasters.
The PubMed abstract:
Green tea intake lowers fasting serum total and LDL cholesterol in
adults: a meta-analysis of 14 randomized controlled trials.
Xu YL, Li SH, Liu XX, Hui R, Huang XH. Author information
The effect of green tea beverage and green tea extract on lipid
changes is controversial.
We aimed to identify and quantify the effect of green tea and its
extract on total cholesterol (TC), LDL cholesterol, and HDL
We performed a comprehensive literature search to identify relevant
trials of green tea beverages and extracts on lipid profiles in
adults. Weighted mean differences were calculated for net changes in
lipid concentrations by using fixed-effects or random-effects models.
Study quality was assessed by using the Jadad score, and a
meta-analysis was conducted.
Fourteen eligible randomized controlled trials with 1136 subjects were
enrolled in our current meta-analysis. Green tea consumption
significantly lowered the TC concentration by 7.20 mg/dL (95% CI:
-8.19, -6.21 mg/dL; P < 0.001) and significantly lowered the LDL-cholesterol concentration by 2.19 mg/dL (95% CI: -3.16, -1.21
mg/dL; P < 0.001). The mean change in blood HDL-cholesterol
concentration was not significant. Subgroup and sensitivity analyses
showed that these changes were not influenced by the type of
intervention, treatment dose of green tea catechins, study duration,
individual health status, or quality of the study. Overall, no
significant heterogeneity was detected for TC, LDL cholesterol, and
HDL cholesterol; and results were reported on the basis of
The analysis of eligible studies showed that the administration of
green tea beverages or extracts resulted in significant reductions in
serum TC and LDL-cholesterol concentrations, but no effect on HDL
cholesterol was observed.