Hi There,
I am getting sleeved in a few weeks and have done a lot of research as far as protein, etc. goes. One thing to be aware of is SOY is a goitrogen (sp?), meaning it represses your THYROID, so if you have a history of THYROID problems, do not eat soy! I see where there are a lot of liquid shakes that have soy as the main ingredient, so I need to be wary and try whey or rice or egg white protein instead. Good Luck!!