A shot of tequila (about 44ml) without admixtures contains an average of 97 calories when made from 100% agave. However, if the tequila is made with a mix of other sugars, the calorie content may vary. It is important to note, however, that when tequila is mixed with other ingredients to make a cocktail, such as lemon juice, agave nectar or lime juice, the calorie content increases. The actual calories in a tequila cocktail will depend on the specific ingredients and the amount mixed into the cocktail. It should be noted that due to its high alcohol content, tequila slows rather than speeds up the metabolism, and consuming larger amounts can ultimately lead to weight gain.