While B12 is important for overall health and energy, it's not typically the go-to for intentional weight gain
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It can lead to neuropathy, megaloblastic anemia, and pernicious anemia, [2] [13] causing symptoms including fatigue, paresthesia, depression, cognitive decline, ataxia, and even irreversible nerve damage
Only if your healthcare provider prescribes it and provides proper training
No serious adverse events have been reported across extensive research use
This may be at room temperature [20-25C (68-77F)], refrigerated [2-8 C (36 -46 F)], or frozen [-15 to -25C (5 to -13F)]