Are you still taking no other B vitamins?
Dog Person had me take B1 with the B2 (I literally mix them in the same capsule) from the beginning. She also said to get 400 mcg/day of folate from food.
She told me to start taking B12 as soon as I noticed a deficiency, which was, as she expected, in a few days. She said to take enough to keep my urine dark yellow because it takes a lot of B12 to put iron in hemoglobin.
She said I would add B6 later, but we never got that for (together, I am taking B6). She said no more than 300% of the daily requirement of B6.
I realize that you are not me, but the conventional wisdom is that it is not good to supplement just one B vitamin.
We are not taking other b vitamins at present.
In the beginning we were taking some adb12 and some methylb12. However, this made us more manic, did not feel right at all after an initial high so we stopped. A couple of months ago, we introduced briefly some b1, but it made us feel tense and aggressive, but did not provide more energy.
We eat very well though and I am sure we are getting enough Bs in general, as much certainly as healthy people who are not supplementing get in their food. We eat home made kefir half of the year and take one month of royal jelly twice a year. Loads of Bs supposed to be in both.
One of the reasons we stuck to the b2 alone is that it seems to have a good effect on us, the other is that at one point we were taking Neurobion, a supplement including B1-B6-B12, and this was not helpful at all.
If B2 is necessary for the absorption of other B vitamins, even not taking extra other b vitamins, I suppose you could increase them by just taking b2, as long as you ate properly.
B1 is supposed to help with myopia and the sympathetic system, but I see better from far just on B2 . I don't understand why. When I tried taking B1 to help with my myopia it did not seem to help.
As to folate, since we do not, absolutely not, take any fake folates, there is no point in supplementing any, they are everywhere, even in meat. They supply the B9.
I have posted on this thread many times exactly what we did in the hope that it can help someone one day.
As soon as something catastrophic happens, I promise I shall post.
For the moment, it seems alright for us both.
Good luck and best wishes!
Asklipia