Here is how to identify and address the most common issues
My patient is refusing a drug studied in 170,000 people because of side effects that a 124,000-person analysis just confirmed do not exist while injecting a compound studied in 14 humans, from unregulated sources, based on the recommendation of someone who profits from selling it
Plant foods do not naturally contain active B12 some fortified foods (plant milks, nutritional yeast) and supplements can help, but injections bypass any absorption issues entirely
He also participated in medical education of Pfizer which was conducing trial on PCC, but nothing directly related to the current manuscript or that could impact our interpretation of data
When the product is not stored properly for example, in a cold area the formula can crystalize
This can lead to reduced absorption, even if you have an otherwise normal diet