Hi, Avoid protein shakes, or any commercially available milk drinks nothing is worth your money. Most commercially available protein shakes are high in carbohydrates and artificial flavours which is not at all healthy.
Next Steps
Eat to maintain not to gain or reduce weight. If you eat healthy you will attain the weight which is natural to your body.
Health Tips
Kindly consult a nutritionist for guidance, this is the best thing you can do for yourself.