Irritable fasting and the one line you shouldn’t cross
In my first post on intermittent fasting I focused on one of the major benefits of this hunter-gatherer regimen: mental focus. Over the last three years, though, I’ve noticed some detrimental effects from IF for me personally that often counter the benefits.
I find that this “diet,” if I can call it that, gives me clarity and drive in the morning in addition to the body-composition benefits that are both anecdotal (pour moi) and to large extent backed by science. Put simply: to those who are looking to simply lose weight, there is more than enough evidence to at least try IF. 
Although keto gets the lion’s share of all diet-related claims of greater focus and clarity, the whole point of my original article was that I personally experience an effect similar to keto when I fast through the morning.  Science, logic, and personal experience lead me to hypothesize that this focus is created by a mix of metabolism, avoidance of “puppy belly,” and hunger. The last one, the actual ‘starvation,’ isn’t really as bad as most people think.
So, what kinds of ill effects can come from intermittent fasting? And how? For God’s sake, man, tell me why?!
The Vantasner Danger Meridian.
The Vantasner Danger Meridian
According to at least one high-level CIA official who also spent significant time on a remote island occupied by Others, the VDM is defined as follows:
the point or line after which danger to your mission and/or sense of self increases exponentially. Often used to demarcate conditions of grave and approaching danger.
The Vantasner Danger Meridian can be regarded as a kind of tipping point. A Rubicon in daily life. Unlike Julius Caesar, though, you might cross this point-of-no-return without knowing it.