Block-chain technology has gained significant attention in various industries, including healthcare. Initially developed for cryptocurrency transactions, block-chain technology is now being explored for its potential applications in healthcare. This scientific research paper aims to explore the use of block-chain technology in identifying nutrition deficiencies in humans. In recent years, there has been a growing interest in using block-chain technology to address key challenges in healthcare. The paper reviews recent work in the field of block-chain technology in healthcare and identifies its limitations and challenges. The authors conduct an analysis of state-of-the-art block-chain research in healthcare and explore its applications, particularly in nutrition deficiency analysis. The authors also highlight the potential benefits of using block-chain technology in this context, such as improved data integrity and security, enhanced traceability of nutritional information and increased patient empowerment.