In the video above, it gets interesting at about 7:40.

Dr. Bikman (professor) explains:

The insulinogenic effect of protein is heavily influenced by underlying glycemic status. He shows that the body will make an adjustment, as in, if in a fasted state, then ingesting protein, the insulin does not respond, glycogen does. This is because in the study (dogs, which digestive tracts are most similar to humans), the dogs would faint if there were a substantial insulin response. The body does not do this because we can't afford to inhibit gluconeogenesis.

So, moving on to humans, around 11:37.

In a low carb environment, there is a **smaller** insulin effect of protein, where there isn't a steady stream of carbohydrates spilling into the system. (On the side, he covers how a low carb diet gives you several benefits of fasting without having to fast).

Don't miss 20:07 where he shows when a person on a low carb diet eats protein, the insulin to glucagon ratio does not change! If you are eating the standard american diet, though, the protein compounds teh effect of eating carbohydrates.

We can't afford to have protein give us a big insulin effect when we are eating low carb. The body controls this, otherwise, we would become hypoglycemic.

Gluconeogensis is basically the liver creating glucose, which is necessary on a low carb diet.

Then he goes on to explain why he does not think eating fat in lieu of eating protein for the sake of ketogenesis is the best course of action.