Regarding the vectors of green tea supplements used in the intervention, 12 studies used green tea extract, (Reference Rondanelli, Gasparri and Perna32,Reference Kondori, Ghaleh and Hosseini35,Reference Shin, Lee and Seo42,Reference Hussain, Habib Ur and Akhtar48,Reference Hadi, Pourmasoumi, Kafeshani, Karimian, Maracy and Entezari49,Reference Kuo, Lin, Bernard and Liao52,Reference Spadiene, Savickiene and Ivanauskas53,Reference Liu, Huang, Huang, Chen, Chiu and Hsu55,Reference Lasaite, Spadiene, Savickiene, Skesters and Silova56,Reference Bogdanski, Suliburska, Szulinska, Stepien, Pupek-Musialik and Jablecka60,Reference Mohammadi, Hosseinzadeh Attar and Karimi63,Reference Li, Chen and Aldini64) 9 studies used epigallocatechin-3-gallate (EGCG), (Reference Bazyar, Hosseini and Saradar36Reference Benlloch, Cuerda Ballester and Drehmer38,Reference Maeda-Yamamoto, Nishimura and Kitaichi43,Reference Borges, Papadimitriou, Duarte, Lopes de Faria and Lopes de Faria51,Reference Mielgo-Ayuso, Barrenechea, Alcorta, Larrarte, Margareto and Labayen54,Reference Basu, Betts, Mulugeta, Tong, Newman and Lyons58,Reference Suliburska, Bogdanski, Szulinska, Stepien, Pupek-Musialik and Jablecka59,Reference Basu, Du and Sanchez62) 5 studies used green tea catechins, (Reference Ahmad Merza Mohammad31,Reference Venkatakrishnan, Chiu and Cheng41,Reference Sone, Kuriyama and Nakaya61,Reference Fukino, Ikeda, Maruyama, Aoki, Okubo and Iso65,Reference Erba, Riso, Bordoni, Foti, Biagi and Testolin66) and other studies used green tea leaves
Continuous low-dose use appears tolerated by some users but lacks long-term data
Its main role is to neutralise free radicals and protect cells from oxidative damage and stress
The key difference lies in how the body processes them
The support of human genetic evidence for approved drug indications
