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The peptide itself is not the weak linkthe supply chain is
Causes of high vitamin B12 The causes fall into two broad categories: exogenous (something youre taking in) and endogenous (something happening inside your body)
When youre vitamin B12 deficient, it can lead to various symptoms including fatigue, weakness, shortness of breath, heart palpitations, and more
A typical beginner protocol might look like this
For each eligible study, two authors (MM and AN) independently extracted data, which was then reviewed by a third author (JV) using a piloted spreadsheet, in accordance with Cochrane Collaboration guidelines ( Where relevant data were missing, attempts were made to contact corresponding authors
Within the first day or two, the vitamin is absorbed into your bloodstream, and your cells finally get the supply they were missing
