No idea - if I leave it outside the fridge and it works, then it takes 10 days to 2 weeks or so, for me to get the main benefit re energy/concentration, instead of 3 weeks for fridge high-meat. For some reason, half of my experiments with high-meat left outside fail completely(they just dry up instead of blossoming into a fungoid, putrid mass), and onl c.10% of the high-meat I leave in the fridge fails. I think this has something to do with lack of humidity? No idea, really.