Now 3 weeks out, energy has returned
Common signs include: Fatigue and weakness Numbness or tingling in the hands and feet Difficulty walking or balance problems Mood changes, such as depression or anxiety Cognitive difficulties, including memory loss or confusion If not treated, a B12 deficiency can cause serious problems
Injectable B-12 improves circulation, metabolism, and brain function, helping to boost energy levels and reduce fatigue
Figures S4 and S5 show networks of routes of administration for secondary outcomes
Pernicious anemia Pernicious anemia has been estimated to affect approximately 2% to 3% of individuals over 65 years of age (5)
Compounding of unknown risks: Combining two compounds with incomplete human safety data multiplies the uncertainty considerably