Understanding the true role of this vitamin within the broader context of metabolic health is essential for making informed decisions about supplementation
Gwyer 2019
2016 FDA
This may result in sense loss, difficulty in proprioception, neuropathic pain, difficulty walking, poor balance, loss of sensation in the feet, muscle weakness, blurred vision (either due to retinopathy [27] or optic neuropathy [28] ), impaired urination, fertility problems, decreased sense of taste and smell, decreased level of consciousness, changes in reflexes, memory loss, mood swings, depression, irritability, cognitive impairment, confusion, anxiety, clumsiness, dementia, and, in more severe cases, psychosis
Facts and Myths No , it has not been scientifically proven that Vitamin B12 directly causes weight gain