Purwanto DA, Agustin BD, Ekowati J. A study of the stability of antioxidant activity of green tea extract powder with vitamin C. Pharm Educ [Internet]. 2023 Oct. 10 [cited 2026 May 1];23(4):p. 159-163. Available from: https://pharmacyeducation.fip.org/pharmacyeducation/article/view/2259