Longitudinal changes in physical capacity from adolescence to middle age in men and women
NAD+ helps improve energy at the cellular level, and B12 helps with fatigue from deficiencies
When symptoms do occur, they usually reflect underlying conditionssuch as liver disease, haematological disorders, or renal impairmentrather than the elevated vitamin itself
Vegans and vegetarians are at particular risk, since B12 is found almost entirely in animal products
If low, ask your doctor whether a shot or supplement is right
If your deficiency is more serious and you have symptoms of ill-health, a stronger dose of Vitamin B12 may be prescribed to be taken orally, in an IV drip or an intramuscular shot