14-hours is about when your body runs out of food in digestion mode and switches over to starvation mode. Once in starvation mode, the body recycles itself to keep going (meaning breaking down bad tissues to reuse). The reason they recommend 16-hours is because it gives you 2-hours a day of turbo breaking down of bad tissue. The 14-hour hump is what is hard to overcome, but once you overcome it, it gets easier and easier.
14-hours is about when your body runs out of food in digestion mode and switches over to starvation mode. Once in starvation mode, the body recycles itself to keep going (meaning breaking down bad tissues to reuse). The reason they recommend 16-hours is because it gives you 2-hours a day of turbo breaking down of bad tissue. The 14-hour hump is what is hard to overcome, but once you overcome it, it gets easier and easier.