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Thus, it is difficult to examine the deficiency of vitamin B12, and it takes several years to have its symptoms, such as tiredness, weakness, or fatigue

Combine with other wellness practices : Regular exercise, good sleep, and stress management enhance your energy levels

B12 is safe on its own, but a few conditions call for extra care, which is why a provider reviews your history before treatment: Leber's hereditary optic neuropathy, a rare inherited eye condition, where certain forms of B12 may be a concern for the optic nerve

A sterile gauze pad (usually 2 x 2 inches) A sterile adhesive bandage (note - make sure the patient is not allergic to the adhesive, as can lead to irritation near the wound) A clean towel Most subcutaneously-injected medications are clear and come in similarly-sized containers

Only for qualified personnel in a controlled research environment