Traditionally, nutrition research has relied on population averages
However, its important to understand that not all fatigue is caused by B12 deficiency
Direct Dosage: A single B12 injection often delivers a much higher dose directly into the system than a typical daily oral tablet, particularly when considering the limited absorption rate of the latter, contributing to their perceived and actual strength. However, for individuals with mild dietary deficiencies and no underlying absorption problems, high-dose oral B12 supplements (e.g., 1000-2000mcg daily) can sometimes overcome the need for intrinsic factor by allowing for a small amount of passive absorption, eventually raising levels, though this method is less predictable and slower than direct injection
Research suggests it works by strengthening extracellular matrix proteins around hair follicles
In a study, it was found that the MDA level increased in epilepsy patients compared to the healthy control group 21
A more extensive list of potential side effect risks (which are very rare), can be read on the Botox for chronic migraine AbbVie website