This really depends on you! In general, we recommend having one serving of protein powder per day.
However, depending on your goals, more than one serving may be appropriate. For example, people who are looking to bulk up may benefit from more than one serving per day. If you'd like to discuss your specific protein powder needs, get in touch with your Registered Dietitian by logging into Gainful.com and navigating to the "My Dietitian" tab.