Yes, children as young as 2 years old can use protein powders when incorporated into a healthy diet. In fact, for many kids with several allergies, it can be very beneficial to use protein powders to ensure kids are meeting their daily recommended nutrition.  Additionally, you want to make sure that you don’t overfeed protein to children. A good rule of thumb to determine how many grams of protein your kid needs every day, is to take their weight and divide by 2. Then, aim for that many grams of protein per day.  For example, if your toddler weighs 25 pounds, divide this by 2 to get 12.5. So 12 to 13 grams of protein per day is a good number.