One thing we found in going from the B12 sublingual to the B12 oil was that it FELT like the sublinguals gave more energy, but really it was just that wonderful spike. Something like the hit of that first coffee in the morning.reporting back for a final conclusion on my oil trial.
I have tried the methyl/adeno mix and did not see any more improvement than what I was getting with sublingual. Maybe like a 10% improvement over the sublingual, if even. Then again, if you are doing the Fred protocol, and don't want to rot your teeth, this is a good option.
Also, overall the Fredd protocol gave me about 15% more energy, which is OK but really not much when you are bed riddent.
The B12 oils gave a smoother and longer-lasting experience.
That said, we did both for a while: as much as two slurps of adenosyl/menthl B12 oil in the morning plus any number of adenosylB12 sublinguals later in the day. We did this for months.
We're now on one slurp of adenosyl/methyl B12 oil and two slurps of straight methylB12 oil - both applied in the morning - and no more sublinguals.