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Reply to Letter to the Editor – Therapeutic effect of high-dose green tea extract on weight reduction: A randomized, double-blind, placebo-controlled clinical trial
Clinical Nutrition 35 (2016) 239
Contents lists available at ScienceDirect
Clinical Nutrition journal homepage: http://www.elsevier.com/locate/clnu
Letter to the Editor
Reply to Letter to the Editor e Therapeutic effect of high-dose green tea extract on weight reduction: A randomized, double-blind, placebo-controlled clinical trial
Dear editors, Thank you for your comment! In Table 3, the standard deviation of the weight in both group is higher, which means that some subject had higher body weight change in placebo group, but it didn't reach clinical significance in whole group using paired ttest. In Table 4, we can also observe the reduction percentage in palcebo group had higher standard deviation, but in average, the reduction percentage is smaller in placebo group compared to EGCG group. In our 3rd paragraph of our discussion, we also stated that even the placebo group showed significant body composition change with decreased waist and hip circumference. Thus, we think that a possible reason for the lack of distinct differences in our between-group anthropometric measurement analysis could be that cellulose might also have beneficial effects on weight regulation with increased dosages and longer duration. So we also stated that a large-scale study with a longer follow-up should be conducted in the future to decrease the standard deviation. Our study demonstrated that high-dose EGCG has the potential for weight reduction within toxic range of daily catachins without abnormal liver function noted during treatment for 3 months compared to our previous trial of lower dose EGCG treatment on obese women. But we still pointed out that mild elevated liver function was noted in treatment group
although within normal range and careful monitoring the liver enzymes during high-dosage of green tea extract may be warranted. About the subjects number enrolled in our study, we have already stated in our result that among 102 subjects that are eligible for the study, 10 subjects refused to participate. Five subjects in group A and seven subjects in group B discontinued the study due to personal reasons without discomfort reported. There were two subjects in group A and one subject in group B who took less than 95% of the capsules and were thus deemed non-adherent to the protocol requirements. So finally there are 77 subjects completed the 12 weeks of treatment. Conflict of interest None declared. Chung-Hua Hsu, Professor Institute of Traditional Medicine, National Yang-Ming University, Taipei, Taiwan E-mail address: [email protected].
DOI of original article: http://dx.doi.org/10.1016/j.clnu.2015.09.013. http://dx.doi.org/10.1016/j.clnu.2015.09.014 0261-5614/© 2015 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
16 September 2015
Contents lists available at ScienceDirect
Clinical Nutrition journal homepage: http://www.elsevier.com/locate/clnu
Letter to the Editor
Reply to Letter to the Editor e Therapeutic effect of high-dose green tea extract on weight reduction: A randomized, double-blind, placebo-controlled clinical trial
Dear editors, Thank you for your comment! In Table 3, the standard deviation of the weight in both group is higher, which means that some subject had higher body weight change in placebo group, but it didn't reach clinical significance in whole group using paired ttest. In Table 4, we can also observe the reduction percentage in palcebo group had higher standard deviation, but in average, the reduction percentage is smaller in placebo group compared to EGCG group. In our 3rd paragraph of our discussion, we also stated that even the placebo group showed significant body composition change with decreased waist and hip circumference. Thus, we think that a possible reason for the lack of distinct differences in our between-group anthropometric measurement analysis could be that cellulose might also have beneficial effects on weight regulation with increased dosages and longer duration. So we also stated that a large-scale study with a longer follow-up should be conducted in the future to decrease the standard deviation. Our study demonstrated that high-dose EGCG has the potential for weight reduction within toxic range of daily catachins without abnormal liver function noted during treatment for 3 months compared to our previous trial of lower dose EGCG treatment on obese women. But we still pointed out that mild elevated liver function was noted in treatment group
although within normal range and careful monitoring the liver enzymes during high-dosage of green tea extract may be warranted. About the subjects number enrolled in our study, we have already stated in our result that among 102 subjects that are eligible for the study, 10 subjects refused to participate. Five subjects in group A and seven subjects in group B discontinued the study due to personal reasons without discomfort reported. There were two subjects in group A and one subject in group B who took less than 95% of the capsules and were thus deemed non-adherent to the protocol requirements. So finally there are 77 subjects completed the 12 weeks of treatment. Conflict of interest None declared. Chung-Hua Hsu, Professor Institute of Traditional Medicine, National Yang-Ming University, Taipei, Taiwan E-mail address: [email protected].
DOI of original article: http://dx.doi.org/10.1016/j.clnu.2015.09.013. http://dx.doi.org/10.1016/j.clnu.2015.09.014 0261-5614/© 2015 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
16 September 2015