The liver stores B12, and these stores can last a significant time (up to several years for non-deficient individuals), but when they are depleted, it takes consistent input to rebuild and maintain them
However, for those with more severe deficiencies, it might take a bit longer or require a series of injections to fully replenish their stores and experience the full benefits
Acta Orthop Scand 71:316321 Ethics declarations Conflict of interest The authors declare that they have no conflict of interest
This has nothing to do with b12 status and everything to do with excessive caloric deficit and insufficient protein intake relative to the rate of weight change
A gray-market vial offers none of those protections, and with peptides whose evidence is still developing, that oversight is the difference between a considered plan and an experiment on yourself
Avoiding these six common mistakes puts you miles ahead of the average person starting out