Role of Vitamin B in Healthy Ageing and Disease.

B vitamin complex consist of vitamins B1, B2, B5, B6, B9, B12 and is pivotal for overall health, influencing vital functions such as, energy metabolism, DNA maintenance, and healthy immune system. Inadequate B vitamin levels are associated with various health issues, including neurocognitive problems, immune imbalances, and inflammation. In ageing individuals, deficiencies in B vitamins increase the risk of cardiovascular ailments, stroke, cognitive disorders, neurodegeneration, mental health issues, and methylation-related disorders. These result primarily due to changes in glycation, mitochondria, and oxidative stress. Thus, ensuring optimal vitamin B levels in the ageing population may be beneficial in preventing such age-related diseases. In this chapter we discuss the extensive role of B vitamins in the ageing process.