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Mild side effects can include short-term injection-site redness and very rarely transient mild headache in the first week
The information provided is for scientific and educational purposes only
What changes is accumulated risk and your ability to justify the vial
This is particularly beneficial for those who have hit a plateau in their weight loss
A 2021 systematic review of 16 randomized controlled trials and 6,276 participants (Markun and colleagues, Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue, Nutrients, 2021) found that B12 supplementation does not reliably reduce fatigue in people who are not deficient
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