Low fasting insulin suggests insulin sensitivity, and a rise in postprandial insulin, triggered by protein or carbohydrates, is beneficial for humans.

“you want your fasting insulin to be low which suggests that you are insulin sensitive but a rise in postprandial insulin triggered by either protein or carbohydrates or both yes protein will trigger a rise and post-brandial Insulin but usually not to levels high enough to allow people to maintain their electrolyte status this is why people on ketogenic diets run into so many problems they post brand new rise in insulin is a beneficial thing for humans because of this”