While B12 can be obtained through diet or oral supplements, injections offer several advantages that make them a popular choice for those seeking to optimize their health
Side effects [edit] The literature data on the acute toxicity profile of hydroxocobalamin show it is generally regarded as safe with local and systemic exposure
There are many ways to gain B12
Still, side effects from B12 supplements are possible, especially at higher doses, and include: Headache Nausea Vomiting Fatigue Weakness Diarrhea Tingling in the hands and feet Nasal spray Vitamin B12 is also available in a nasal spray
[1] Other manifestations of B12 deficiency include glossitis (sore, red tongue), mouth ulcers, visual disturbances, and in severe cases, psychiatric symptoms such as depression, psychosis, or dementia-like presentations