<s>[INST] Hi doctor, I am 24 years old male. My body weight is not proportionate to my age and height. Please let me know the proportion that has to be noticed while selecting the best protein powder to gain weight? [/INST] Hi. I would suggest you the following proportion to keep in mind while selecting a protein powder: Typically, it is good to include this in between the meals. Wishing you good health. For further guidance feel free to ask a nutritionist online --> </s>