absorption? Of B12? Read here that is there is %100 absorption rate? Probably the reason.
Irreversible? brain damage/impairment seems to be clearing up.
Im out of fish oils too, and I seem to be doing good.
Im taking extra things still, and need less, but they seem to be working better?
Also, I took some cinnamon before bed, and believe it really helps my brain. To a very beneficial degree.
Brain seems to be coming back, after years.