Functional vitamin C production within the cells produces steady, constant levels of vitamin C endogenously as compared to consuming it once in food and may be metabolised differently.
Vitamin C is important to many cellular metabolism pathways related to energy levels in humans and functional vitamin C production can have various other profound effects.
Interestingly, most mammals generate vitamin C within their bodies but humans do not.
I’ve noticed increased energy levels, faster healing, more clarity of mind and other effects from the audio.
Edit: Good point about The Super Human Mutant. I had forgotten about that.