Use morning and night
Seek immediate medical attention for severe abdominal pain (especially if radiating to the back, which may indicate pancreatitis), persistent vomiting, signs of dehydration, or symptoms of gallbladder problems (pain in the right upper abdomen, especially after meals)
The standard vitamin B12 injection dosage for adults is 6 mcg (micrograms) per day
The FDA has a special program called "expanded access" (sometimes called compassionate use) for people who are seriously ill and have run out of options
Khaw KT, Sharp SJ, Finikarides L, Afzal I, Lentjes M, Luben R, Forouhi NG
This is unsurprising considering its importance to our overall health and wellbeing