👉 Thiamine is a vitamin B1 family group member that belongs to the class of nicotinamide adenine dinucleotide (NAD+) and has been shown to play a role in various cellular processes, including energy metabolism. It is essential for normal function of certain tissues and cells, such as nerve and muscle cells, but it can also be toxic if not used properly. In terms of the structure of thiamine, it consists of two amino acids: threonine (R