"Explore the intricate world of thiamine deficiency with 'Thiamine Deficiency: From Pathways to Innovations - A Comprehensive Exploration.' Delve into the depths of cellular metabolism, neurological functions, and the biochemistry of thiamine, unraveling its crucial role in energy production and nervous system health. This treatise navigates through the complex pathways of thiamine absorption, exploring sources, biochemical functions, and the critical role played by thiamine pyrophosphate (TPP) in enzymatic reactions.