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Common signs of B12 deficiency include fatigue, weakness, constipation, loss of appetite, and weight loss (NIH, 2020)
Never freeze a mixed solution, and discard it if it ever looks cloudy or discoloured
It usually only takes a few minutes to perform these tests
"It's really important that scientific discoveries are translated from the bench cells, animals into humans through a series of clinical trials that prove at every step, with increasing numbers of subjects, that this product is effective, that it's safe, and that you know how much of it to administer." With files from Ariel Tozman
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