What does thiamine or vitamin b1 do?

Question

my friend gave me a hangover patch...thats the main ingredient does it just hydrate you or what [oh and its also good for repelling buggies]

Answer 1

Thiamine is essential for neural function and carbohydrate metabolism. A severe thiamine deficiency results in Beriberi which is a nerve and heart disease. In less severe deficiency, nonspecific signs include malaise, weight loss, irritability and confusion.