This research examined essential food security determinants in dry regions of Kenya, utilising Turkana as the case study. The study's objectives were to ascertain (i) the role of agriculture in food security within arid regions, (ii) the impact of agrinutrition programs on the wellbeing of populations in these areas, and (iii) a revitalisation plan for agriculture in dryland regions through agribusiness, industry, and marketing. Survey methods was utilised to examine the study variables, with a semi-structured questionnaire serving as the data collection instrument. N=100 farmers were randomly chosen from five prominent irrigation projects in Turkana: Turkwell, Katilu, Morulem, Nadoto, and Kainuk, with N=20 farmers selected from each scheme. In total, N=65 were women farmers, and N=23 were young farmers (<35 years). N=18 pertinent government and civil society agriculture specialists were purposefully chosen to partake in the study. The research results indicate systemic obstacles in food security and market advancement in arid regions. The significant challenges in agriculture include insufficient research, crop pests and diseases, substandard seed technology, inadequate extension services, and inferior taste of crop products. In agrinutrition, dietary diversity remains limited at both the household and market levels. In agribusiness, farmers and entrepreneurs possess insufficient knowledge, agro-processing has yet to be initiated, and markets in Turkana are predominantly controlled by products from other counties that have maintained a significant market share for an extended period. The study advocates for research on drought-resistant crops, efficient dryland farming and irrigation technologies, early warning systems, agricultural literacy initiatives for local farmers, crop pest and disease management strategies, enhancing market orientation in agriculture, improving nutrition, diversifying and making food products in local markets affordable, and educating households and broader consumers on food diversity and optimal recipes through Behaviour Change Communication (BCC) programs. The study advocates for the enhancement of extension services through the augmentation of agricultural coaches and mentors, the realisation of economies of scale in production and processing, and the institutionalisation of climate change information. Furthermore, it is essential to revolutionise agriculture in arid regions via agribusiness, optimal aggregation models, cost-effective and dependable transportation from farms to markets, agro-processing advancement, mechanisation, and the digitisation of agricultural practices to enhance operational efficiency.