Nafa Andini 2026. The Effectiveness Of Celery And Rosella Flower Decoctions In Reducing High Blood Pressure At The Elderly Integrated Health Post (Posyandu) In Rw 01, Kebon Baru Village, South Jakarta In 2025. International Journal of Health Engineering and Technology. 5, 1 (May 2026). DOI:https://doi.org/10.55227/ijhet.v5i1.749.