Thiamine hydrochloride is a form of vitamin B1. Use: nutritional supplement. Vitamin B1 is involved in the intermediate metabolism of sugars in the body. Vitamin B1 is insufficient in the body, the activity of cocarboxylase is decreased, and glucose metabolism is blocked, which affects the whole metabolic process of the body. Acetone decarboxylation was blocked, and it could not enter the cycle of tricarboxylic acid, and did not continue to oxidize, and accumulated in the tissue. At this time, the nervous tissue energy supply is insufficient, so corresponding neuromuscular symptoms can appear, such as multiple neuritis, muscle atrophy and edema, and in severe cases, it can also affect the function of myocardial and brain tissue. Vitamin B1 deficiency can also cause indigestion, loss of appetite and constipation.