HMR is a hospital based program that uses 5 shakes a day for a total of 500 calories. You may have one in your area. They have a home version but it includes 2 prepackaged meals. Now you could buy the shakes and do it on your own but this is not advised as there needs to be medical supervision. My ownopinion is that you could utilize your own doctor to provide the medical supervision. The hospital program also includes educational meetings but I do not know how valuable they are.
The website for Health management resources (HMR) if yourbetterhealth.com
or at least it used to be. You cam purchase the products online or directly from the centers if you have one nearby.
I will tell you that the products are $$$ but taste good.