Khamid, Mohammad Abdul (2025) EFFECTIVENESS OF VITAMIN B12 SUPPLEMENTATION ON REDUCING FATIGUE LEVELS IN WORKERS OF PONDOK MODERN DARUSSALAM GONTOR BUSINESS UNIT: A CASE STUDY ON THE LA-TANSA CONVECTION INDUSTRY. D4 Diploma thesis, Universitas Darussalam Gontor.

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Abstract

Work fatigue in the garment industry affects productivity and safety and is influenced by excessive workloads, piecework systems, and a lack of attention to workers' health. Prevention can be achieved through vitamin B12 intake, which enhances energy and concentration. This study examines the effectiveness of vitamin B12 in reducing work fatigue as a recommendation for occupational health policies. This study is a quasi-experimental research involving 57 out of 68 employees of La-Tansa Konveksi who met the inclusion criteria. The work fatigue levels of all participants were measured before and after the intervention, which consisted of administering vitamin B12 supplement tablets for six days. The study was conducted from October 2024 to January 2025. Fatigue measurement was performed using a reaction timer instrument, and statistical analysis was conducted to compare the average values before and after the intervention. The reaction time before supplementation was 278, whereas after supplementation, it decreased to 266. A significant reduction in the average reaction time was observed after the intervention (P-Value 0.000 or 0.05), indicating a statistically significant difference. This study proves that six-day vitamin B12 supplementation effectively reduces work fatigue among La-Tansa Konveksi employees, as indicated by the decrease in reaction time scores from 278 to 266 (P-Value 0.000). Future research is recommended to include workers with heavier workloads, explore the optimal dosage, and incorporate a control group for more accurate validation.

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