Pratiwi, Y. and Bintang Ramadhani 2026. Effectiveness Of Red Ginger Herbal Beverage As A Biomarker-Based Occupational Health Intervention On Blood Lactic Acid Levels Among Trans Metro Pekanbaru Bus Drivers With Low Back Pain. International Journal of Health Engineering and Technology. 5, 2 (Jul. 2026). DOI:https://doi.org/10.55227/ijhet.v5i2.1023.