The study investigated qualitatively and quantitatively the present knowledge, perception and practices towards dietary supplements among 139 adults between the ages of 18-64 who were randomly selected in Westlands Constituency, Kenya. Data collection was conducted using a semi-structured questionnaire during the harvest season (November 2019). Whereby, the data collection was done using Open Data Kit (ODK) and analyses were conducted using Statistical Package for Social Sciences (SPSS0 version 20. The results indicated that this study consisted of largely a youthful population between the ages 18-34 years of age. Only 14.4% (n=20) of the total study population indicated to have used dietary supplements within 12 months from when the study was conducted. Females covered the largest proportions (64.3%) in the entire study compared to the proportions (33.4%) of males (X2 (2) = 2.383, p=0.304). There was a greater level of use among females between the ages of 18-34 residing in Loresho and Parklands respectively. Whereby, multivitamins were the common and widely dietary supplements by 70% of the supplement users. The main reason why a majority of the females used dietary supplements was largely due to anaemia and Osteomalacia respectively. Contrary, the males who used supplements in this study wanted to alter the structure of the body (muscle hypertrophy) as a result used creatine and whey protein supplements. The proportion (64.3%) of females was significantly higher to the proportions (33.4%) of males who got prescription from a medical practitioner for the supplements used (X2/Likelihood ratio (1) = 14.004, p=0.009). However, the largest proportion (50%) of females and male proportion (50%) sourced the supplements by purchasing the supplements over the counter from pharmacies. There were so many misconceptions with regards to the definition of dietary supplements since the results indicated that a majority of the adults in Westlands constituency perceived ..........