does vitamin b12 injections have side effects do Too Much B12: Is It Bad for Your Health? – Benefits of Vitamin B12 Shots

recommends that you take a daily B12 supplement providing at least 50 micrograms per day, or one weekly supplement providing 2,000 micrograms

This makes injections especially helpful for people who have trouble absorbing vitamins or need results quickly

Adequate levels support memory and focus, which is especially helpful for people juggling busy schedules or mentally demanding work

Depending on which nerves are affected, it can cause numbness, tingling, burning pain, weakness, or problems with automatic body functions like blood pressure, digestion, or bladder control

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Summary: Vitamin B12 is an essential, water-soluble vitamin that helps produce DNA, energy and RBCs