Yes, you can mix hemp protein powder with water. The benefits of mixing hemp protein powder with water include convenience and a lower calorie option compared to mixing with milk. Additionally, water provides a neutral base that does not alter the taste of the hemp protein powder, making it a good option for people who want to avoid the taste of milk or who have lactose intolerance. Mixing hemp protein powder with water is also a good option for people who are looking for a more portable option to take on the go, as it does not require refrigeration.