Sun Protection Factor Activity of Jamblang Leaves Serum Extract (Syzygium cumini), Hidayah, Himyatul, Amal Surya, Yuniarsih Nia,, Kusumawati Anggun Hari, Gunarti Neni Sri, Abriyani Ermi, Mursal Iin Lidia Puta, Sundara Adinda Khansa, and Alkandahri Maulana Yusuf , Pharmacognosy Journal, March 2023, Volume 15, Issue 1, p.134-140, (2023)