Mild, short-lived reactions can include soreness at the injection site, a brief flushing sensation, mild bruising, or, very rarely, mild nausea
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
This eliminates any issues that may be associated with patients whose bodies are unable or less able to absorb B12 into their bloodstreams through pills or vitamins
I could tell absolutely no difference