Glutathione causes massive "CATESTROPHIC" B12 DEFICIENCY in a day or two. It is dangerous. As I have decent B12 system now after 7 years of lithium making TCR-Li I have a very well working B12 system with a 24 hour half-life estimated. instead of the 20-50 minutes after an injection without a working lithium-B12 system. I can't tell the difference between MeCbl brands any more and haven't been able to for many year now. And some of the things may be specific to certain people by chance of what is the cause.
I like injections from a compound pharmacy. I don't know about the amount absorbed but I can clearly feel a very positive improvement from injecting 1 mg daily. I'm also trying several brands that include dibencozide from iherb and Amazon -- one day per week. I have only tried a quarter pill so far and that gave me a strong flushing type feeling (weird bc no niacin was involved). Maybe that's the wrong word. But the somewhat intense reaction only lasted for a few minutes. Otherwise, I didn't notice much of any effect. Obviously the dosing may be the issue there
NOW has a 10,000 mcg (10mg) sublingual. I have used that and it has been effective for me. The other brand is Nature’s Way B12 Infusion Methylcobalamin. I have only found that at iherb. It is 1,000 mcg or 1 mg sublingual.
Do you guys also take methylfolate together with the B12? Vimergy B12 is by far the most effective B12 I've taken, but it also contains Adenosylcobalamin together with methylcobalamin, is that a good thing or should I take them separately instead? I ask because when I took Vimergy B12 I got startup side effects like red dots on the skin of my hand, and a yellow mark on my thigh. These went away after I stopped the Vimergy B12, I'm just wondering if starting both methyl and adenosyl B12 at once is too much for me?