Background and objectives: Diabetes has emerged as a major healthcare problem in India and Puducherry. It is estimated that every fifth person with diabetes will be an Indian, which is due to adopting a negative lifestyle. The study aimed to assess the effectiveness of fenugreek (seeds) powder administration in reduction of blood glucose level among type-II diabetes mellitus (DM) patients. Materials and methods: A quantitative research approach was adopted with the pre-experimental (one group pretest–posttest only) research design, and the purposive sampling technique was used to select the sample and the structured questionnaire was used to collect the data from 40 samples with type-II DM at Pillaiyarkuppam, Puducherry. The pretest glucose analysis was conducted by using a glucometer. The posttest was conducted after 2 weeks of intervention. Results: The result proves that there is an effectiveness in fenugreek seed powder administration between the pretest and posttest, the p value was highly significant at p < 0.001 level. Conclusion: It was implied that the fenugreek seeds that are easily available, cheap of cost, and used in treatment of type-II DM, help in cost-effective management of this chronic disease.