It is perfectly safe for the majority of people to drink 4-5 cups of coffee a day. It is recommended that women who are pregnant or trying to conceive stick to 200mg caffeine per day (1-2 cups coffee), Advice about moderate consumption is based on the average amount of caffeine in a normal cup of coffee. Caffeine content can change depending on the size of your drink and how strong you like it. Remember that caffeine is also found in other products such as tea, cola and chocolate. For more information on caffeine, please see: www.coffeeandhealth.org/topic-overview/sources-of-caffeine/