Signs and symptoms of vitamin B12 deficiency can include fatigue, pale skin, headaches, shortness of breath, fast heartbeat, gastrointestinal issues, mouth inflammation, paresthesias (abnormal sensations), decreased cognitive ability, depression, muscle weakness, imbalance and incoordination, vision problems, and erectile dysfunction
During the titration phase, keep monitoring your blood sugar levels, weight changes, and side effects
Sources Food sources Only certain bacteria and archaea can synthesize vitamin B 12 (123, 124)
(Those over 65 years of age, however, should take at least 1,000 mcg cyanocobalamin every day.) If you get a B12 injection, the likelihood of it triggering acne may only be about one in ten
Eggs and dairy products, such as milk, cheese, and yogurt, offer moderate levels of B12