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Thank for taking the time to read and respond :) between 2.5 and 10 micrograms daily.

The b12 tablets I bought in the US are 1000mcg is this way too much or are they using a different measure

Some b12 supplements are designed to be taken weekly or even monthly.

Yeh seems to be a bit of a grey area .

u might want to check this article out, im going to write more about b12 very soon, its a big topic with a lot of grey areas, i dont have all the answers but im big on researching about it, also be sure to check the comments very interesting...
https://steemit.com/vegan/@celestialcow/uncovering-the-vitamin-b12-myths-part-1-mushrooms-the-flesh-of-the-gods

Your blog piece was a great read, thanks for sharing :)