Here's a (confusing)hypothesis. The acid in the Jarrows when used over time might change the mucous membranes in a way that allows for better absorption. So when first changing to the other brand without the acid, the benefits from the previously used acidic Jarrows tablet initially allowed for good absorption of the new, non acidic but better quality mb12 tablet. After some time the absorption rate might fall again because the acidic tablet is no longer being used.
Maybe.
Hi Adster,
There was a hypothesis I put forth 9 years ago about the more acid tablet playing a role. I have tested that with pure MeCbl crystal sublingually for some duration, one series using bread as a bland carrier and using an apple slice as an acidic carrier. I was never able to find any difference, at least with large enough doses for colorimetry. I tried to increase absorbtion via more acid. Somebody reports success with DMSO and described how he did it, just in the past week. We batted that acid thing around for near a year as far as absorbtion goes. The only catch is that NOTHING but the Jarrow surpassed the ENZY and nothing but the ENZY surpassed the Jarrow. None of the others have been good enough to stay on for months while making gains and not backsliding.
Source Naturals 5mg MeCbl which was right in the ball park on acid was so bad it was indistinguisable from CyCbl, at the time I ran the tests and by report from many people since then.
I would love to see somebody organize a set of testers just starting MeCbl and sensing onset of each MeCbl dose. With a little practice a person can rate them with reasonable accuracy from that onset effectiveness compared to others. Then do the first dose test and longer tests. I have not seen any that only pass 1 but not the other.
The questionaire with 1 dose 120 minutes onset didn't work with other brands, certainly no where near the 75% of the two 5 star brands. The only AdoCbl tested in that manner was the Country Life. It's only now that I know why so much more AdoCbl came out in the urine. That was becasue of the folic acid. Good luck.