I am on the Optifast program through Kaiser. I have plenty of weight to lose and this is a pretty sure way to do that.

There are different versions of the diet, but I am on the lowest calorie version.

The diet consists of 5 shakes a day. There are three flavors available; vanilla, chocolate and orange. It comes in pre-measured packets of powder which can be mixed with any non-caloric beverage. It does not taste or smell vitamin-ish, even though it is primarily just a source of your needed nutrients.

The five shakes provide 400 calories per day.