If you don’t want to increase calories but increase protein intake. Try Amino Acids no added flavor very little calories. . Just a suggestion. I took them for years and still do. Best wishesYou notice the one I take is not listed. It has to be recommended by a doctor to get it. The reason the doctor put me on this one is it is supposed to be the easiest absorbing protein. Maybe because he owns much of the company also who knows. It's not for building muscle or losing weight but I am starting to wonder if the one from Costco which on your list is #3. I used to use it all the time but this particular doctor who was considering doing surgery on my bypass and redo it so I would absorb food told me I either needed to get on this or a feeding tube 24hrs a day for 1 month before he would consider it. He is a great doc and I kind of owe my life to him as he was the only doc that knew what was going on when I was in a coma and gave me the proper things to bring me back from near death, the others had pretty well given up on me. He is also the doc that amputated my legs. I know it is recommended for people like me who have had surgery that causes malabsorbtion but it is really expensive. I have a half of a bag of it left. Possibly it would work.. When he first had me start the Metagenics. I could use $150 extra a month to pay my taxes thanks to the tax cut.