On one of the Paleo Solution podcasts Mat LaLonde revealed that he does a protein fast in the mornings. Rather than fasting all together he has a can of coconut milk upon waking. He says that if you eat a little fat but refrain from eating protein you still get some of the benefits of intermittent fasting, still get the autophagies (our self cleaning system) to turn on but not necessarily stress the system. Chris Kresser also agrees that fasting can be stressful in people with poor insulin control, since fasting can elevate cortisol levels resulting in elevated blood sugar levels. He notes that many people switching over to the Paleo diet come from a background of high insulin and are at a higher risk for fasting’s potential negative effects. Waiting for the benefits of IF to kick in can cause a cycle of high insulin and cortisol.
I know many questions have been raised on here about IF with regards to the cortisol issues discussed above or people with Leptin resistance. Equally, there have been some who don't necessarily respond positively to IF even if they are metabolically sound and relatively healthy. I've done some 2-3 day bone broth fasts with good results to my digestive system, however, I have also attempted IF (16/8) with no positive results and some negative results. So I do think some type of fasting is appropriate and beneficial, but of course the benefits are individual. Therefore, taking the thought process that everyone would benefit with some sort of fasting, here are my questions:
Do any of you approach IF in this manner (protein fasting) and if so have you seen any benefits? Also, for the ones that have done both IF (16/8) and protein fasting can you provide a negative or positive comparison?