Thanks a lot for the invitation to answer this question Robert Sharp As you haven't stated what size latte you drink I'm going to base my response on a regular 8 ounce size which has one shot of espresso topped with steamed milk. read more
One shot of espresso provides around 80mg of caffeine so the total in 3 lattes is 240 mg. If you drink large cups then the caffeine goes up to almost 500mg. A healthy level of caffeine is up to 300mg so based on you drinking from an 8 oz cup your intake of caffeine is perfectly safe. read more