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B12 is not considered toxic if you get too much, Scott said: "The body has the ability to excrete excess." The recommended daily allowance for a regular (non-pregnant, non-lactating) adult is 2.4 micrograms per day
We screen for all four primary contaminants on every batch
doi: 10.1038/s41392-020-00349-7
Studies show a connection between insomnia and levels of B12, while other studies show that high levels of B12 can lead to increased sleep disruptions and a shorter sleep duration 6, 7
The Dietary Guidelines for Americans suggest no more than one daily drink for women and two for men
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