M.
Gaining 2 lbs in 6 months is normal according to my daughter's pediatrician. When my daughter was 2, she was about 22 lbs too. My daughter will be 3 in a few months and weighs just 26 lbs. You probably just have a petite child. My daughter lost interest in food around that age too. Your daughter is probably just more interested in playing at this point. I wouldn't worry about it, but if you want to try supplements, I buy Nutripal bars for my daughter and she will eat about half of one at one time. They are a little expensive though, but you don't have to give it to her everyday - just when you notice she isn't eating well that day. My daughter's pediatrician said if they are eating at least one good meal a day, they should be fine. You can just carry nutritious snacks around with you in your purse and let her snack. Offer things like cheerios, fruit, yogurt, and cheese often. Don't give her too much juice. It may fill her up and has lots of empty calories. As long as you're offering her foods and she is snacking, she will be alright.