I looked into the MTHFR mutation and while it seems there are different variations, what I got was that they can't convert cyanocobalimin to be used. Methylcobalimin is the more bioavailable form, and cyano is synthetic. Cyano is more stable, so the amount listed is what you get, but needs to be converted to be absorbed.,This mutation lacks the ability to use synthetic forms of B12 as well as Folic acid
Ah, i got your point. I also had done a small "research" before i started taking methylcobalamin. I HAD to find the way, because cyanocobalamin wasn't helping me at all, my general B12 blood levels used to drop drastically and i used to end up in hospital. But then i learned about 3 forms of B12, and decided: "What if i don't have this ferment that converts cyanocobalamin into something more suitable? Maybe that's why cyanocobalamin isn't helping me?" So i read a bunch of articles explaining the difference, listened to Michael Klaper's recital about it, found methylcobalamin in that "Muscle" sports nutrition shop, and boom! It helped! My bloodwork showed the best result that i've ever had (later, it showed even better, maximal level, but not too high). Now i'm taking methylcobalamin 1500 mcg in capsules, though it's better to consume it in tablets, because it penetrates right into bloodstream while you're dissolving it in the mouth, but i didn't find any in tablets (i was lucky to buy the jars with capsules, as it was the last day before the quarantine,- and i haven't been to the city since then). I couldn't buy Calcium Citrate there though, and i regret (somedays i'll have to order a delivery).
I'm worried about of my levels of everything either.
Sometimes i get really paranoid. 
As soon as i didn't buy Calcium Citrate, i have to take "Calcium Carbonate +D3" vitamins. I get paranoid because i've been deficient of different nutrients in my life and it sucked. The only thing i'm afraid to supplement my blocky carcass with, is Biotine (though i have a tendency of leak of Biotine). I devour red beans in enormous quantities, and that's the only thing that helps. I wanted to buy a Biotine supplement once (i found a very good one, from California), but then i found a research which said that cancer cells accumulate biotine from surrounding tissues and eat it! So it appears to be that excessive biotine is kind of food for cancer cells! It looks like the rule "Everything in moderation" works in this case. I'd better struggle to get my daily intake of biotine than get tumors because of my greed...
I take milk thistle too! (as sometimes, my liver can misbehave a little). I have capsules consisting of artichoke and milk thistle, but i'm trying to be frugal, so i take milk thistle grist periodically (granted, once i bought a few foxes for mom). I noticed that these capsules help, and even grist helps me.
I didn't understand all the differences when I read about it, but did you see the link I used for Jarrow methyl b12 &methyl folate tabs? I bought them once to see if it mattered to my son, then found he wasn't taking them.
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"island" is a very bad sign. So, while some natural resources are resurrecting,- our town may get back to the state of oozy swamp, because that's what it used to be before big civilization came to its banks. The river was bigger, and the land was very uncomfortable to live on (only a few Finn-Ugric tribes lived here). During soviet era, people have buried many Izhora arms, having damaged the eco-system, and now nature will take the revenge. And oozy swamp means malaria. Humanoids will extinct for their disrespect to nature and destroying the delta (the latest act of violence towards nature is the construction of Defence bridge, which has destroyed an entire unique eco-system on/around "Big Izhorsky pond").
Our state is going to start opening up on Wednesday. I'm not ready for it, so I think I will continue on with only going out for essential grocery shopping. The rate of new cases hasn't really dropped, though hospitalizations have. Our public transportation has been running on a reduced schedule but only because people stopped taking it. When I see a bus on my walk there may be two or three people on it, probably those who have no other way to get anywhere.
