The worm alters the chemistry of the tequila’s chemistry. Another important fact to remember about the worm in the tequila bottle is that it contributes to the alteration of the liquor’s chemistry. This is due to the fact that the worm has a high concentration of unsaturated alcohols as well as other chemicals.
So, what is the significance of the worm in mezcal? It wasn’t until the 1950s that larvae began appearing in mezcal bottles, when a mezcal manufacturer discovered a moth larva in a batch of his whiskey and decided that having the stowaway in his bottle increased the flavor of the booze. As part of his marketing approach, he began including ″worms″ in all of his bottles.